Everyday Calculators
Health screening numbers, dates, U.S. customary and metric units, meeting times, and a 4.0 GPA. Fast answers with the method written out.
Everyday
BMI Calculator
Calculate body mass index from height and weight in metric or imperial units. See the WHO category and the BMI formula.
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Everyday
Age Calculator
Calculate age from a birth date, or the exact difference between two dates in years, months, and days. Leap years included.
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Everyday
Unit Converter
Convert length, weight, and temperature between metric and U.S. customary units. cm to inches, kg to lbs, Celsius to Fahrenheit.
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Everyday
Time Zone Converter
Convert a date and time between world time zones, including U.S. zones and daylight saving. Schedule meetings without the offset guess.
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Everyday
GPA Calculator
Calculate a weighted GPA on a 4.0 U.S. scale. Add courses, letter grades, and credit hours to see your average.
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Frequently asked questions
- What everyday calculators are included?
- BMI (metric or imperial), age and date difference, length/weight/temperature conversion, world time zones with U.S. daylight saving, and a weighted 4.0 GPA calculator.
- Is the BMI calculator a diagnosis?
- No. It uses the standard BMI formula and WHO categories as a screening number, not medical advice.
- Do date or GPA inputs leave my device?
- No. Age, units, time zones, and GPA all run locally in the browser.