Math & Date Calculators
Twelve free calculators and converters for the maths and dates you need every day: a full scientific calculator, fractions, averages with standard deviation, your exact age, the days between two dates, converting time between zones, and length, weight, temperature and data converters. Everything runs in your browser — no sign-up, no uploads.
The scientific calculator handles roots, powers, trigonometry and logarithms with correct order of operations. The age and date tools use your browser's real calendar, including leap years, so the day counts are exact. The time zone converter uses the browser's built-in time-zone database, so daylight saving time is handled for the date you choose.
Scientific Calculator
Roots, powers, trigonometry, logs and parentheses — with keyboard support.
Calculate →Fraction Calculator
Add, subtract, multiply and divide fractions, simplified with decimals.
Calculate →Average Calculator
Mean, median, mode, range and standard deviation for any list of numbers.
Calculate →Age Calculator
Your exact age in years, months and days — plus days to your next birthday.
Calculate →Date Difference Calculator
Days, weeks and business days between any two dates.
Calculate →Time Zone Converter
Convert a time between New York, London, Tokyo and more, with DST handled.
Convert →Length Converter
Convert cm to inches, mm, feet, yards, miles and more.
Convert →Weight Converter
Convert kg to lbs, grams, ounces and stone.
Convert →Temperature Converter
Convert Celsius, Fahrenheit and Kelvin.
Convert →Data Converter
Convert bytes, KB, MB, GB and TB (1024-based).
Convert →Unit Converter
Length, weight, temperature, area, volume, speed, time, data and more in one place.
Convert →GPA Calculator
Semester and cumulative GPA on 4.0 and 5.0 scales, weighted.
Calculate →Browse Other Categories
- Finance Calculators — mortgage, salary, loans, retirement and more.
- Health Calculators — BMI, calories, body fat, due date and tips.
- Text Tools — word counter, case converter, readability and more.
- Developer Tools — JSON, Base64, regex, UUID, hashes and JWT.
- Generators — passwords, QR codes, barcodes and SEO generators.
- File Tools — merge PDFs, convert images, compress files — all in your browser.