Calculators

Calculate exact age in years, months, and days from a birth date, plus total days lived.

Run AND, OR, XOR, NOT, and bit-shift operations, with results in decimal, binary, and hex.

Calculate Body Mass Index from height and weight, with standard WHO category ranges.

Calculate the difference between two dates in days, weeks, months, years, and business days.

Calculate your overall GPA from course names, credit hours, and letter grades on the standard 4.0 scale.

Calculate network address, broadcast address, subnet mask, and usable host range from CIDR notation.

Estimate monthly payment, total interest, and total cost for a fixed-rate loan.

Calculate percentages three common ways: X% of Y, what percent X is of Y, and percent change.

Calculate a tip and split the total between any number of people, with common percentage presets.

Convert length, weight, and temperature between common units, live as you type.