Metric ↔ imperial without the mental math
Pick a category, choose your units, and type a value — the conversion is instant and exact. Covers the everyday needs: recipe volumes, luggage weights, road-trip distances, oven temperatures, floor areas, and speed limits.
Frequently asked questions
How accurate are the conversions?
Factors use the exact international definitions (an inch is exactly 25.4 mm, a pound exactly 453.59237 g), with results shown to sensible precision.
How does temperature conversion work?
Temperature isn't a simple multiplication — Celsius, Fahrenheit, and Kelvin have different zero points. The converter applies the proper formulas (°F = °C × 1.8 + 32, K = °C + 273.15).
Are these US or UK units?
Volume uses US definitions (a US gallon is 3.785 L; an imperial gallon is 4.546 L). Length and weight units are identical in both systems.