# Calculator.com

> Free online calculators and converters for mathematics, finance, science, health, time, measurement, and everyday problem solving.

Generated: 2026-09-17T07:47:01Z
Build ID: 65bae647-2c9a-4b57-9c21-245aa9fbaf0b

## Primary resources

- [Calculator.com](https://calculator.com/): Calculate, convert, and explore free online calculators.
- [Calculator Directory](https://calculator.com/directory/): Browse calculators by subject.
- [Scientific Calculator](https://calculator.com/calculate/scientific/): Full scientific calculator.
- [Standard Calculator](https://calculator.com/calculate/standard/): Standard arithmetic calculator.
- [Fractions Calculator](https://calculator.com/calculate/fractions/): Calculate with fractions.
- [Complete LLM reference](https://calculator.com/llms-full.txt): Complete public page and calculator inventory.

## Calculator categories

- [Automotive Calculators](https://calculator.com/directory/automotive/): Calculators for fuel economy, speed, horsepower, vehicles, boats, and other automotive-related estimates.
- [Computing Calculators](https://calculator.com/directory/computing/): Calculators for data, downloads, computer storage, and other computing tasks.
- [Conversion Calculators](https://calculator.com/directory/converters/): Convert currencies, temperatures, measurements, data sizes, and other units.
- [Date & Time Calculators](https://calculator.com/directory/date-time/): Calculators for calendar dates, elapsed days, countdowns, age, business days, and time durations.
- [Financial Calculators](https://calculator.com/directory/financial/): Calculators for mortgages, loans, leases, savings, investments, retirement, and other financial decisions.
- [Fun Calculators](https://calculator.com/directory/fun/): Lighthearted calculators for dates, compatibility, signs, and other fun uses.
- [Health & Fitness Calculators](https://calculator.com/directory/health-fitness/): Calculators for body measurements, calories, pregnancy dates, and other health-related estimates.
- [Math Calculators](https://calculator.com/directory/math/): Calculators for percentages, equations, geometry, trigonometry, prime numbers, and other math problems.
- [Other Calculators](https://calculator.com/directory/other/): Useful calculators that do not fit neatly into the main categories.
- [Sports & Hobbies Calculators](https://calculator.com/directory/sports-hobbies/): Calculators for vehicles, sports, hobbies, speed, power, and related activities.
- [Weather Calculators](https://calculator.com/directory/weather/): Calculators for weather, atmosphere, wind chill, and related atmospheric estimates.