Bidirectional, instant
Type into either side; the other updates as you type. No "convert" button to chase.
Unit Converter Studio
Nine categories. Hundreds of units. One clean interface — with the formulas, history, and gotchas spelled out for the conversions that everyone gets wrong.
Pick a category
Length
Meters, feet, inches, miles, kilometers and more.
Convert →Weight & Mass
Kilograms, pounds, ounces, stones, tons.
Convert →Temperature
Celsius, Fahrenheit, Kelvin.
Convert →Volume
Liters, gallons, cups, fluid ounces, milliliters.
Convert →Area
Square meters, acres, hectares, square feet.
Convert →Speed
m/s, km/h, mph, knots.
Convert →Time
Seconds, minutes, hours, days, weeks.
Convert →Data Size
Bytes, KB, MB, GB, TB (decimal and binary).
Convert →Energy
Joules, calories, kWh, BTU.
Convert →Formula on every page
The exact relation (and a worked example) sits below the converter — no scavenger hunt for the math.
Private by design
Your numbers stay in your browser. There is no API call, no telemetry on your inputs.
Mobile-first
Designed for the phone you grabbed mid-recipe, mid-shipping-form, or mid-DIY project.