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Free Financial Calculators & Guides

Make smarter money decisions with our suite of precision-built financial calculators. From mortgage payments to retirement projections, get the numbers you need—instantly.

8Calculators
7In-Depth Guides
10+FAQ Answers

Financial Calculator Suite

Eight powerful calculators to help you plan, budget, and grow your wealth. Select a calculator to get started.

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Mortgage Calculator

Estimate your monthly mortgage payment based on loan amount, interest rate, and loan term. Our free mortgage calculator shows you the full cost of homeownership including total interest paid.

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Compound Interest Calculator

Watch your money grow exponentially. Enter your starting amount, interest rate, time horizon, and compounding frequency to see the future value of your investment.

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Retirement Savings Calculator

Are you saving enough for retirement? Enter your age, savings, and monthly contributions to project your retirement fund and see if you're on track for financial independence.

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Debt Payoff Calculator

Enter your debt balance, APR, and monthly payment to find out exactly when you'll be debt-free and how much interest you'll pay along the way.

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Car Loan Calculator

Planning to buy a car? Estimate your monthly auto loan payment based on the vehicle price, down payment, interest rate, and loan term.

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Budget Planner

Enter your monthly income and expenses to instantly see your remaining balance and personal savings rate. A clear budget is the foundation of every sound financial plan.

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Monthly Expenses

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Net Worth Calculator

Your net worth is the single most important number in personal finance. Add up what you own, subtract what you owe, and get a clear snapshot of your financial health.

Assets (What You Own)

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Liabilities (What You Owe)

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Emergency Fund Calculator

How much do you need in your emergency fund? Enter your monthly essential expenses and desired coverage period to find your target savings amount.

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Financial Guides & Articles

Build financial literacy with our in-depth guides covering saving, investing, budgeting, and debt management strategies for 2026.

How to Build an Emergency Fund in 2026

An emergency fund is the cornerstone of financial security. It's a dedicated pool of money set aside to cover unexpected expenses—job loss, medical emergencies, car repairs, or home maintenance—without derailing your financial plans or forcing you into high-interest debt. In 2026, with economic uncertainty and rising costs of living, building a robust emergency fund is more important than ever.

Financial experts recommend saving three to six months of essential living expenses. If your monthly essentials (rent or mortgage, utilities, food, insurance, transportation, and minimum debt payments) total $4,000, your target emergency fund should be between $12,000 and $24,000. Those with variable income, dependents, or limited job mobility should aim for the higher end—six to twelve months of coverage.

Start by opening a separate high-yield savings account (HYSA). In 2026, many online banks offer annual percentage yields between 4% and 5%, meaning your emergency fund earns meaningful interest while remaining fully liquid. Do not invest your emergency fund in stocks, crypto, or other volatile assets—the whole point is guaranteed availability when you need it.

If saving thousands feels overwhelming, begin with a "starter" emergency fund of $1,000 to $2,000. Automate a transfer from each paycheck—even $50 or $100 per pay period adds up. Once your starter fund is established, gradually increase contributions. Redirect windfalls like tax refunds, bonuses, or rebates directly into the fund. Track your progress monthly and celebrate milestones.

Common mistakes to avoid include raiding the fund for non-emergencies, keeping it in a checking account where it's too easy to spend, or setting an unrealistic savings timeline that leads to burnout. Your emergency fund should be boring and untouchable—that's exactly what makes it powerful. With consistent effort, most people can build a fully funded emergency reserve within 12 to 24 months.

Understanding Compound Interest: Your Money's Best Friend

Albert Einstein allegedly called compound interest "the eighth wonder of the world," and whether or not the attribution is accurate, the math certainly lives up to the hype. Compound interest is the process by which interest is calculated not only on your initial principal but also on the accumulated interest from previous periods. This creates an exponential growth curve that accelerates over time.

Here's a simple example: if you invest $10,000 at 7% annual return compounded monthly, after 10 years you'll have approximately $20,097—more than double your original investment. After 20 years, that same $10,000 grows to roughly $40,387. After 30 years, it becomes about $81,165. The key insight is that the growth isn't linear—it accelerates. Your money earned $10,097 in the first decade but gained over $40,000 in the third decade alone.

The three variables that matter most are rate of return, time, and consistency. You can't control market returns, but you can control when you start and how consistently you contribute. A 25-year-old who invests $300 per month at 7% until age 65 will accumulate approximately $791,000. If they wait until age 35 to start, the same monthly contribution grows to only about $366,000—less than half—despite contributing for only 10 fewer years.

Compounding frequency also plays a role, though a smaller one. Monthly compounding produces slightly more than annual compounding, and daily compounding edges out monthly. The differences become more pronounced at higher interest rates and longer time horizons. For most practical purposes, the difference between monthly and daily compounding is negligible—what matters far more is starting early and staying consistent.

Compound interest works against you with debt. Credit cards charging 20% APR compound your balance daily, meaning unpaid balances grow rapidly. A $5,000 credit card balance at 20% APR with minimum payments can take over 20 years to pay off and cost more than $8,000 in interest. Understanding compounding motivates both aggressive investing and aggressive debt payoff—make this force work for you, not against you.

Mortgage vs. Renting: The Real Math

The "rent vs. buy" debate is one of the most heated in personal finance, and the honest answer is: it depends on your specific situation. Buying a home builds equity over time, but renting offers flexibility and avoids many hidden costs of homeownership. Let's break down the real math behind both options.

When you buy a home with a mortgage, your monthly payment includes principal (which builds equity), interest (which goes to the bank), property taxes, homeowner's insurance, and potentially PMI and HOA fees. On a $350,000 home with 20% down and a 6.5% rate on a 30-year mortgage, your principal-and-interest payment is about $1,770. Add taxes ($350/month), insurance ($150/month), and maintenance (typically 1-2% of home value annually, or $290-$580/month), and your true monthly cost is $2,560 to $2,850.

Renting that same home might cost $2,000-$2,200/month with no maintenance responsibilities, no property tax risk, and no large down payment locked up. The renter could invest the $70,000 down payment in a diversified portfolio averaging 7-10% annually. Over 10 years at 8%, that $70,000 could grow to $151,000. Add monthly investment of the cost difference ($400-$800/month), and the renter's portfolio may rival or exceed the homeowner's equity.

However, homeownership offers advantages the math alone doesn't capture. Mortgage payments are partially forced savings through principal paydown. Home values historically appreciate 3-4% annually (though this varies significantly by market). Homeowners enjoy tax deductions on mortgage interest (if itemizing), and a fixed-rate mortgage locks in your housing cost while rents typically increase 3-5% annually. There's also the intangible value of stability, customization, and community roots.

The break-even timeline is typically 5-7 years—meaning you should plan to stay in a purchased home at least that long to recoup transaction costs (closing costs, agent commissions). If you might move within 3-5 years, renting is almost always financially superior. Use our mortgage calculator to run the numbers for your specific situation and compare the total cost of each path over your expected time horizon.

The 50/30/20 Budget Rule Explained

The 50/30/20 budget rule, popularized by Senator Elizabeth Warren and her daughter Amelia Warren Tyagi in their book "All Your Worth," is one of the simplest and most effective budgeting frameworks available. It divides your after-tax income into three clear categories: 50% for needs, 30% for wants, and 20% for savings and debt repayment.

The "needs" category (50%) covers everything essential for basic living: housing (rent or mortgage), utilities, groceries, health insurance, car payment, minimum debt payments, and childcare. These are expenses you cannot avoid without significant consequences. If your needs exceed 50% of your income—common in high-cost-of-living areas—you may need to find ways to reduce housing costs, increase income, or adjust the ratios temporarily.

The "wants" category (30%) covers everything that enhances your life but isn't strictly necessary: dining out, entertainment, streaming services, gym memberships, vacations, hobbies, shopping for non-essentials, and upgraded versions of needs (choosing a luxury apartment over a basic one, for example). This category provides the lifestyle flexibility that prevents budget burnout. Many strict budgets fail because they eliminate all enjoyment—the 50/30/20 rule builds in permission to spend.

The "savings and debt" category (20%) is where wealth building happens. This includes contributions to your emergency fund, retirement accounts (401k, IRA), taxable investment accounts, and extra payments above minimums on debt. If you have high-interest debt (credit cards, personal loans), allocate most of this 20% toward aggressive payoff. Once debt-free, redirect those payments to investments. Automating this 20% through direct deposit splits or automatic transfers removes willpower from the equation.

To implement the rule, start by calculating your monthly after-tax income. If you earn $5,000/month after taxes, your targets are $2,500 for needs, $1,500 for wants, and $1,000 for savings/debt. Track your spending for one month to see where you actually fall. Most people discover their needs category is too high and their savings too low. The 50/30/20 framework gives you clear targets to work toward gradually rather than demanding overnight perfection. Even getting close to these ratios puts you ahead of most households.

How Much Do You Need to Retire? A Complete Guide

The most common retirement question is also the most anxiety-inducing: "How much is enough?" While there's no universal answer, financial planners have developed several reliable frameworks to help you estimate your target number. The key factors are your desired lifestyle, expected retirement age, anticipated expenses, and withdrawal strategy.

The most widely cited guideline is the "25x Rule," which states you need 25 times your expected annual retirement expenses saved before you retire. If you expect to spend $60,000 per year in retirement, your target is $1.5 million. This rule is based on the "4% Rule"—the finding that withdrawing 4% of your portfolio in the first year of retirement (adjusting for inflation each subsequent year) provides a very high probability of your money lasting 30+ years. Some conservative advisors now recommend a 3.5% withdrawal rate given longer life expectancies and market uncertainty.

Estimating retirement expenses requires honesty. Many costs decrease in retirement (commuting, work clothes, payroll taxes, retirement contributions themselves), but others increase (healthcare, travel, hobbies). A common estimate is that you'll need 70-80% of your pre-retirement income, though retirees with paid-off mortgages and no debt may need less. Healthcare is the wildcard—a 65-year-old couple retiring in 2026 can expect to spend $315,000 or more on healthcare throughout retirement, according to Fidelity's annual estimate.

Social Security provides a foundation but shouldn't be your entire plan. The average monthly benefit in 2026 is approximately $1,900, or about $22,800 per year. For higher earners, the maximum benefit at full retirement age is around $4,000/month. Factor in Social Security as a supplement, not a primary income source. Pensions, if you're fortunate enough to have one, can significantly reduce your savings target.

The most powerful variable is time. Starting retirement savings at 25 versus 35 can mean the difference between retiring comfortably and working years longer than planned. Maximize employer 401(k) matching (it's free money), contribute to a Roth IRA if eligible for tax-free growth, and increase contributions by 1% each year. Use our retirement calculator to run your specific numbers and see exactly where you stand on the path to financial independence.

Credit Score 101: Everything You Need to Know

Your credit score is a three-digit number that lenders use to assess your creditworthiness—essentially, how likely you are to repay borrowed money. The most commonly used scoring model is FICO, which ranges from 300 to 850. A score of 740 or above is generally considered "very good" and qualifies you for the best interest rates, while 800+ is "exceptional." Scores below 670 may result in higher rates or difficulty getting approved for credit.

FICO scores are calculated using five weighted factors. Payment history (35%) is the most important—even one late payment can drop your score 50-100 points and stay on your report for seven years. Amounts owed, or credit utilization (30%), measures how much of your available credit you're using. Keeping utilization below 30% is standard advice, but below 10% produces the best scores. Length of credit history (15%) rewards longevity—keep your oldest accounts open even if you rarely use them.

New credit inquiries (10%) track how often you've applied for credit recently. Each hard inquiry can temporarily lower your score by 5-10 points, though rate shopping for a mortgage or auto loan within a 14-45 day window counts as a single inquiry. Credit mix (10%) considers the variety of your accounts—having both revolving credit (credit cards) and installment loans (auto, mortgage, student) is beneficial, but never take on unnecessary debt just to diversify your mix.

Building or improving credit takes patience but follows predictable rules. Set up autopay on all accounts to ensure 100% on-time payment history. Request credit limit increases (without spending more) to lower your utilization ratio. Avoid opening too many new accounts in a short period. If you're building from scratch, consider a secured credit card or becoming an authorized user on a family member's well-managed card. Monitor your credit report at AnnualCreditReport.com for free—dispute any errors immediately, as mistakes are surprisingly common.

Your credit score affects far more than loan approvals. It influences mortgage and auto loan interest rates (a 100-point difference can mean tens of thousands in extra interest over a loan's life), insurance premiums in many states, apartment rental applications, and even job offers in certain industries. Investing time in building strong credit pays dividends across nearly every area of your financial life.

Debt Snowball vs. Avalanche: Which Strategy Wins?

When you have multiple debts—credit cards, student loans, car payments, medical bills—choosing the right payoff strategy can save you thousands of dollars and years of payments. The two most popular approaches are the debt snowball method and the debt avalanche method. Both work, but they optimize for different things: psychology versus pure math.

The debt avalanche method is mathematically optimal. You list all debts from highest interest rate to lowest, make minimum payments on everything, and direct all extra money toward the highest-rate debt first. Once that's paid off, you roll its payment into the next highest-rate debt, and so on. This approach minimizes total interest paid over time. For example, if you have a 22% APR credit card, a 6% auto loan, and a 4.5% student loan, the avalanche method attacks the credit card first regardless of balance size.

The debt snowball method, popularized by Dave Ramsey, takes a different approach. You list debts from smallest balance to largest, regardless of interest rate, and pay off the smallest balance first. The psychological advantage is real: paying off a $500 medical bill in two months creates a tangible win that motivates you to tackle the next debt. Research from Harvard Business Review found that people using the snowball method were more likely to stick with their payoff plan and eliminate all debt, even though they paid more in total interest.

In practice, the interest cost difference between the two methods is often smaller than people assume—typically 5-15% more total interest with the snowball method, depending on your specific debts. If your highest-rate debt also has the largest balance, the difference narrows even further. If you're disciplined and motivated purely by numbers, the avalanche method saves more money. If you struggle with consistency and need early wins to stay committed, the snowball method's psychological benefits may outweigh its mathematical cost.

A hybrid approach can offer the best of both worlds: start with the snowball to build momentum by knocking out one or two small debts quickly, then switch to the avalanche to minimize interest on larger balances. Regardless of which method you choose, the most important step is making a plan and sticking to it. Use our debt payoff calculator to model both scenarios with your actual numbers and see exactly how each strategy affects your timeline and total cost.

Frequently Asked Questions

Answers to the most common personal finance questions, written by financial planning professionals.

How much house can I afford?

A general rule of thumb is that your monthly mortgage payment (including taxes and insurance) should not exceed 28% of your gross monthly income. This is known as the "front-end ratio." For example, if your household earns $8,000/month gross, your maximum housing payment should be about $2,240. Additionally, your total debt payments (housing plus car, student loans, credit cards) should not exceed 36% of gross income—the "back-end ratio." Lenders may approve you for more, but staying within these limits protects your budget and reduces financial stress. Use our mortgage calculator to estimate payments for homes in your target price range and see what fits comfortably.

How much should I save for retirement?

Financial advisors typically recommend saving 10-15% of your gross income for retirement, starting as early as possible. Fidelity's age-based milestones suggest having 1x your annual salary saved by 30, 3x by 40, 6x by 50, and 8x by 60. If you're starting late, you may need to save a higher percentage. Always contribute at least enough to get your full employer 401(k) match—that's an immediate 50-100% return on your money. Use our retirement savings calculator to see whether your current savings rate puts you on track for your target retirement age.

What is compound interest and why does it matter?

Compound interest is interest earned on both your original deposit (principal) and the interest that has already accumulated. It differs from simple interest, which only applies to the principal. For example, $10,000 at 7% simple interest earns $700/year consistently. With compound interest, you earn $700 the first year, then $749 the second year (7% of $10,700), and the growth accelerates from there. Over decades, compounding transforms modest, consistent investments into significant wealth. It's also why starting early matters so much—each year of delay means losing the most powerful years of exponential growth. Try our compound interest calculator to visualize the effect.

How much emergency fund do I need?

Most financial experts recommend keeping 3-6 months of essential living expenses in a readily accessible savings account. "Essential expenses" means rent/mortgage, utilities, food, insurance, transportation, and minimum debt payments—not your full spending including entertainment and dining. If you're self-employed, have irregular income, work in a volatile industry, or are a single-income household with dependents, aim for 6-12 months. Keep the fund in a high-yield savings account, not invested in stocks. Our emergency fund calculator can help you determine your specific target based on your expenses and current savings.

Should I pay off debt or invest?

The answer depends on interest rates. If your debt's interest rate is higher than the expected return on your investments (historically ~7-10% for diversified stock portfolios), paying off debt is the guaranteed, risk-free "return." Credit card debt at 18-25% APR should almost always be paid off before investing beyond your employer match. However, always: (1) make minimum payments on all debts, (2) contribute enough to your 401(k) to capture the full employer match, and (3) build a small emergency fund first. Low-interest debt (mortgages at 3-4%, federal student loans at 4-5%) can reasonably coexist with investing, since long-term market returns typically exceed these rates.

What is the 50/30/20 budget rule?

The 50/30/20 rule divides your after-tax income into three categories: 50% for needs (housing, food, utilities, insurance, minimum debt payments, transportation), 30% for wants (entertainment, dining out, shopping, hobbies, vacations), and 20% for savings and extra debt payments (emergency fund, retirement contributions, extra debt payments, investments). It's a guideline, not a rigid requirement—adjust the percentages based on your situation. In high-cost-of-living areas, needs might consume 55-60%, requiring you to trim wants accordingly. The key insight is that saving 20% or more of your income is the threshold for building meaningful wealth over time.

How is my credit score calculated?

FICO scores (the most commonly used) range from 300-850 and are calculated using five factors: payment history (35%)—whether you pay on time; amounts owed/credit utilization (30%)—how much of your available credit you use; length of credit history (15%)—the age of your accounts; new credit (10%)—recent credit applications; and credit mix (10%)—variety of account types. The two biggest levers you can pull are paying every bill on time (set up autopay) and keeping credit card balances below 30% of your limit (below 10% is ideal). Improvements typically take 3-6 months to appear but build over time.

What is the difference between APR and interest rate?

The interest rate is the basic cost of borrowing expressed as a percentage of the principal. The APR (Annual Percentage Rate) includes the interest rate plus additional costs such as origination fees, closing costs, mortgage insurance, and broker fees, spread over the life of the loan. APR is always equal to or higher than the interest rate and gives you a more accurate picture of the true annual cost of borrowing. When comparing loan offers, use APR rather than the interest rate alone, since lenders can advertise a low interest rate while charging high fees that raise the effective cost significantly.

How do I calculate my net worth?

Net worth is calculated by subtracting your total liabilities from your total assets. Assets include cash and savings, checking accounts, investments (stocks, bonds, mutual funds), retirement accounts (401k, IRA), real estate (current market value), vehicles, and other valuable property. Liabilities include mortgages, student loans, auto loans, credit card balances, personal loans, and any other debts. A positive net worth means you own more than you owe; a negative net worth (common for recent graduates with student debt) means the opposite. Track net worth quarterly to measure overall financial progress rather than focusing on individual accounts.

Is it better to get a 15-year or 30-year mortgage?

A 15-year mortgage offers a lower interest rate (typically 0.5-0.75% less than a 30-year) and saves a massive amount on total interest. On a $280,000 loan, a 15-year at 5.75% costs about $116,000 in total interest versus approximately $317,000 for a 30-year at 6.5%—a savings of over $200,000. However, the 15-year monthly payment is significantly higher ($2,327 vs. $1,770), reducing monthly cash flow. Choose the 15-year if you can comfortably afford the payment without sacrificing retirement contributions or emergency savings. Choose the 30-year if you need lower payments for flexibility—you can always make extra principal payments when able. Use our mortgage calculator to compare both scenarios.

What's the best way to start investing with little money?

You don't need thousands to start investing. First, if your employer offers a 401(k) match, contribute enough to get the full match—that's an immediate 50-100% return. Next, open a Roth IRA (you can start with as little as $1 at most brokerages) and invest in low-cost index funds that track the total stock market or S&P 500. Target-date retirement funds are excellent all-in-one options that automatically adjust your allocation as you age. Many brokerages offer fractional shares, letting you buy pieces of expensive stocks with as little as $1. The most important thing isn't the amount—it's starting early and being consistent. Even $50/month invested at 7% annual returns becomes over $120,000 in 30 years.

How do taxes affect my investment returns?

Taxes can significantly reduce your investment returns if you're not strategic. In taxable brokerage accounts, you'll pay capital gains tax when you sell investments at a profit—15% for long-term gains (held over one year) or your ordinary income tax rate for short-term gains. Dividends are also taxable annually. Tax-advantaged accounts offer protection: Traditional 401(k) and IRA contributions are tax-deductible now but taxed upon withdrawal in retirement. Roth 401(k) and Roth IRA contributions are made with after-tax dollars but grow and are withdrawn completely tax-free. For most people, maximizing tax-advantaged accounts before using taxable brokerage accounts is the optimal strategy. Consult a tax professional for advice specific to your situation.