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Free Online Calculators

Instant calculations for everyday math — percentage, age, and more. Results update as you type.

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Mortgage Calculator

Estimate monthly mortgage payments with taxes, insurance, HOA, PMI, affordability ratios, rate stress testing, extra payments, and amortization CSV export.

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Loan Calculator

Calculate monthly loan payments, total interest, payoff time, origination fees, extra payment impact, and amortization CSV for fixed-rate loans.

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Auto Loan Calculator

Estimate car payments with vehicle price, down payment, trade-in, sales tax or VAT, fees, APR, loan term, extra payments, and amortization CSV.

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Compound Interest Calculator

Project savings and investment growth with starting balance, regular contributions, return rate, compounding frequency, yearly breakdown, and CSV export.

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Salary Calculator

Convert annual salary to hourly, daily, weekly, biweekly, monthly, PTO-adjusted hourly, and simple after-tax estimates.

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Age Calculator

Calculate your exact age in years, months, weeks, days, hours, and minutes. Discover your zodiac sign, generation label, birth day of the week, and countdown to your next birthday — all instantly.

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Percentage Calculator

Three instant percentage calculators in one: find X% of a number, calculate what percent X is of Y, and compute percentage change between two values — with formula display, quick presets, and copy-to-clipboard.

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Why Use ToolsMint Calculators?

100% Free Forever

All tools are completely free with no daily limits, no watermarks, and no premium tiers. Use as much as you want.

Complete Privacy

Everything runs in your browser using client-side JavaScript. Your data never leaves your device — no uploads, no server processing.

No Signup Required

Start using any tool instantly. No accounts, no email verification, no passwords to remember.

Works on Any Device

Responsive design works perfectly on desktop, tablet, and mobile. All you need is a modern web browser.

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