# TidyCalcs

> Free, instant, no-sign-up online calculators for everyday money, health, and time questions.

TidyCalcs provides six free calculators built for speed and accuracy. Every tool runs entirely in the browser — no accounts, no data collection, no clutter. Results are based on standard published formulas used by lenders, scientists, and health professionals.

## Calculators

- [Mortgage Calculator](https://www.tidycalcs.com/mortgage-calculator/): Monthly payment, total interest, and full year-by-year amortization schedule. Includes property tax and home insurance. Uses the standard fixed-rate amortization formula.
- [Currency Converter](https://www.tidycalcs.com/currency-converter/): Convert between 150+ world currencies using mid-market exchange rates updated daily.
- [Calorie Calculator](https://www.tidycalcs.com/calorie-calculator/): Daily calorie needs (TDEE) based on age, height, weight, sex, and activity level. Uses the Mifflin-St Jeor equation.
- [BMI Calculator](https://www.tidycalcs.com/bmi-calculator/): Body mass index in metric or imperial units, with healthy-range context.
- [Age Calculator](https://www.tidycalcs.com/age-calculator/): Exact age in years, months, and days between any two dates.
- [Date Calculator](https://www.tidycalcs.com/date-calculator/): Number of days between two dates, or a new date after adding or subtracting time.

## About

- [About TidyCalcs](https://www.tidycalcs.com/about/): How the calculators work, the formulas used, and what the results mean.
- [Privacy Policy](https://www.tidycalcs.com/privacy-policy/): No personal data is stored. All calculations happen locally in the user's browser.
- [Contact](https://www.tidycalcs.com/contact/)