Finance Calculators
Free, private calculators for the money decisions that matter: loans and mortgages, compound interest and savings goals, ROI, margins, and break-even. Each one runs in your browser and pairs with a plain-language explainer.
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Compound Interest Calculator
See how an initial balance and regular contributions grow over time with compounding.
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Loan Payment Calculator
Estimate the monthly payment and total interest on a fixed-rate loan.
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Mortgage Calculator
Estimate your monthly mortgage payment with taxes and insurance, plus an amortization chart.
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Sales Tax Calculator
Add sales tax to a price and see the total and tax amount.
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Salary Calculator
Convert an hourly wage into weekly, monthly, and annual pay.
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Auto Loan Calculator
Estimate a car loan payment including sales tax, down payment, and trade-in.
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Savings Goal Calculator
Find the monthly amount to save to reach a target by a chosen date.
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ROI Calculator
Calculate return on investment, net gain, and annualized return.
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Markup & Margin Calculator
Turn cost and price into profit, margin, and markup percentages.
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Break-Even Calculator
Find the number of units you need to sell to cover fixed and variable costs.