Calculators
Quick, accurate calculators for everyday use. Calculate percentages, BMI, age, pace, GPA, unit conversions, and more — all in your browser.
Percentage Calculator
Calculate percentages, percentage changes, and what percent one number is of another.
Ratio Calculator
Simplify ratios and solve proportions. Find the missing value in A:B = C:X.
Age Calculator
Calculate your exact age in years, months, and days from your date of birth.
Days Until Date Calculator
Find out how many days, weeks, and months until any future date.
Time Duration Calculator
Add or subtract time durations. Convert hours, minutes, and seconds instantly.
BMI Calculator
Calculate your Body Mass Index using metric or imperial units and see your weight category.
Calorie Needs Calculator
Estimate your daily calorie needs based on age, height, weight, gender, and activity level.
GPA Calculator
Calculate your GPA from course grades and credit hours. Supports letter grades and 4.0 scale.
Pace Calculator
Calculate running pace, speed, or finish time given any two of distance, time, or pace.
Unit Converter
Convert between units of length, weight, and temperature instantly.