Personal Finance calculators help you understand your money day to day — salary and take-home pay, tips and discounts, savings goals, and early-retirement targets. Popular tools include the Gross Salary Calculator, 401(k) Employer Match Calculator, Tip Calculator, Coast FIRE Calculator, and Double Discount Calculator.
Enter your numbers for an instant estimate, or open the Trending tab to see what others are planning this week. Every calculator is free and works on any device.
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Percentage of Income Spent on Rent CalculatorFind out what percentage of your monthly income goes to rent. Enter your rent and income to check affordability against the 30% rule.
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Percent of Budget Spent CalculatorFind what percentage of your budget you have spent. Enter your total budget and amount spent to see percent used, percent remaining, and money left.
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401(k) Contribution Percentage CalculatorUS 401(k) calculator: enter your salary and deferral percentage to see your annual and per-paycheck retirement contribution amounts.
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Affordable Rent from Income Percentage CalculatorFind your maximum affordable monthly rent based on your income and a chosen percentage (commonly the 30% rule). Free, instant rent budget calculator.
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Average Speed from Time and Distance CalculatorCalculate average speed from distance and time. Enter distance in km, miles, or meters plus hours, minutes, and seconds to get km/h, mph, and m/s.
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Monthly Savings Needed for Goal CalculatorFind the monthly deposit needed to reach a savings goal by a target date, accounting for compound investment growth at your expected annual return.
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Debt-Free Date CalculatorFind out when you'll be debt-free. Enter your balance, interest rate, and monthly payment to see months to payoff, your payoff date, and total interest.
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Mortgage Closing Cost CalculatorEstimate mortgage closing costs and total cash needed at closing from home price, down payment, and a 2-5% closing cost rate (US).
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Time From Speed and Distance CalculatorCalculate how long a trip takes from distance and speed. Enter distance and speed (km/h or mph) to get travel time in hours, minutes, and seconds.
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How Much Monthly to Retire CalculatorFind out how much to save each month to hit your retirement goal. Enter target, current savings, years and return for a monthly contribution figure (USD).
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401(k) vs Roth 401(k) CalculatorUS retirement tool: compare a traditional 401(k) and a Roth 401(k) after taxes, accounting for upfront tax savings invested and your retirement tax rate.
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Net Worth Projection CalculatorProject your future net worth from current assets, annual savings, growth rate, and years. See compound growth and total investment gains over time.
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Nest Egg Needed After Pension & Social SecurityFind the retirement nest egg you need after pension and Social Security. Enter your target income and safe withdrawal rate to size your savings goal.
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Flight Arrival Local Time CalculatorCalculate your flight's local arrival time across time zones. Enter departure time, flight duration, and origin/destination UTC offsets to get arrival time.
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Savings Rate to Retirement CalculatorCalculate your savings rate — the percentage of take-home income you save each period. Enter amount saved and income to see your savings rate instantly.
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Cost of Raising a Child CalculatorEstimate the total cost of raising a child to age 18 plus annual and monthly costs. Enter the annual cost, your child's age and number of kids.
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Speed Calculator (Distance ÷ Time)Calculate speed from distance and time using v = d/t. Enter distance and time in any unit and get speed in km/h, mph, m/s and ft/s instantly.
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Spending as Percent of Income CalculatorCalculate what percentage of your income goes to a spending category. Enter category spending and total income to see the percent and remaining amount.
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Distance Calculator (Speed × Time)Calculate distance traveled from speed and time using d = v × t. Supports km/h, mph and m/s. Fast, free, and accurate distance calculator.
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Income Needed for a Purchase CalculatorFind out how much to set aside from each paycheck to reach your savings goal. Enter your target amount and number of paychecks for an instant answer.
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Army TSP Contribution Calculator (US)Estimate your US Army Thrift Savings Plan (TSP) contributions and BRS agency match — automatic 1% plus tiered matching up to 5% of base pay.
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Student Loan Payoff CalculatorCalculate your student loan monthly payment, total interest, and payoff cost from balance, interest rate, and repayment term. Free amortization tool.
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Compound Savings CalculatorCalculate the future value of your savings with compound interest and regular deposits. See total contributions and interest earned over time.
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Freight Density CalculatorCalculate LTL freight density in lb/ft³ from weight and dimensions, plus an estimated NMFC freight class. Free shipping density tool for US carriers.
Frequently asked questions
What can I work out with these personal finance tools?
Everyday money questions: gross vs take-home pay, hourly-to-salary conversions, tips and split bills, stacked discounts, employer retirement matches, and savings or FIRE targets.
Are the results financial advice?
No. They're estimates to help you plan and compare options. For decisions about your specific situation, speak with a qualified financial professional.
Are these calculators free?
Yes — free, no sign-up, and they work on desktop and mobile.
How accurate are the numbers?
They use standard formulas, but real outcomes depend on tax rules, fees, and terms that vary by country and provider — treat results as a starting point and confirm the specifics.
Do you store the amounts I enter?
No. Everything is calculated in your browser; your inputs are not logged or shared.
