Single-page converter · 150 common conversions

150 common unit conversions in one place

A larger grouped version of the converter, now covering 150 of the most-used conversions across distance, area, weight, volume, cooking, temperature, speed, pressure, time, energy, power, data, and fuel economy.

150 conversion pairs 14 grouped categories Type in either field

🚗 Speed

Kilometers per hour ↔ Miles per hour

Convert between km/h and mph for driving, shipping, weather, and navigation.

Selected: km/h → mph

Value A Kilometers per hour

km/h

Enter a value to convert.

Value B Miles per hour

mph

You can also type on this side.

Formula mph = km/h × 0.621371

Instant reference 1 km/h = 0.621371 mph

Browse all 150 conversions

The full list stays grouped by category, so you can skim or search for aliases like kmph, litres, lbs, sq ft, psi, and mpg UK.

150 conversions across 14 groups

Notes: cooking and liquid measures use US customary cup, quart, gallon, teaspoon, tablespoon, and fluid ounce values. Digital storage and data transfer use decimal SI multiples. The page still runs in a single index.html file with no external libraries.