FREE ONLINE TOOLS

Calculators & converters

Quick, free tools for everyday calculations and conversions. No signup, no downloads, and everything runs in your browser.

Calculate percentages, values, and percentage changes.

Find sale prices, discounts, and how much you save.

Calculate BMI from your height and weight.

Calculate your exact age from your date of birth.

Convert between pixels, inches, feet, meters, and more.

Convert kilograms, grams, pounds, ounces, and more.

Convert height between centimeters, meters, feet, and inches.

Calculate percentage increase or decrease between two values.

Need to resize a photo for a form? Try the SizeKit photo resizer or read our photo guides.