Accurate, Fast & Free Online Calculators
Over 150+ verified tools for finance, real estate, construction, health, and everyday calculations. Instant results, 100% private in your browser.
Flagship Calculation Suites
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Finance & Real Estate
Mortgages, amortizations, loans and investment returns.
Salary & Taxes
Take-home pay, self-employment tax, and deductions.
Construction & DIY
Concrete volume, tiling, paint, and material estimators.
Health & Everyday
BMI index, calorie deficit, percentages and unit conversions.
Built for Accuracy. Free of Unnecessary Noise.
Unlike bloated web apps that harvest your personal financial or health data, OmniCalcs executes all formulas directly inside your local web browser. Your inputs are never stored, transmitted to remote servers, or sold to third parties.
100% Free Forever
Zero paywalls, trial expirations, or gated spreadsheet exports.
Statutory Formulations
Calculations benchmarked against CFPB, IRS, and IEEE standards.
Instant Export
Download CSV schedules or print contractor order sheets in 1 click.