Measurement Converter
Convert between metric and imperial units instantly: length, weight, volume, temperature, area, speed, and data. Exact factors, no rounding surprises, works offline.
Recipes in grams, lumber in inches, fuel in liters, Wi-Fi in megabits — a measurement converter earns its keep dozens of times a week. The trap in unit conversion is not the arithmetic but the factors: which gallon, which ton, whether the converter rounds before it multiplies.
Pick a category, enter the value, and get the conversion with exact factors and sensible precision — 1 US gallon is 3.785 liters, not "about 3.8" unless you ask. It runs entirely client-side, so it answers instantly even with no connection.
100% in-browser · no upload · no signup · nothing you paste or drop here leaves your device
Unit Converter
Convert between 12 categories — length, weight, temperature, volume, area, time, speed, data, pressure, energy, angle, and frequency. Batch convert to all units at once.
Converting 1 km to mi (length) works by routing both units through the meter base unit.
- Input:1 km
- Result:0.62137119 mi
This tool runs 100% in your browser. All computation happens locally on your device — your input is never uploaded to any server. Results are for reference only.
About this measurement converter
This page covers unit conversion calculator, metric to imperial converter, convert inches to cm, kg to lbs converter — all the same underlying task as measurement converter. The tool above is FreeToolHub's unit convert embedded in full: every feature works right here, and nothing you process is uploaded to any server.
Frequently asked questions
How do I convert inches to centimeters?
Multiply inches by 2.54 exactly — the inch is defined as 2.54 cm, so the conversion is exact with no rounding. 10 inches is 25.4 cm. Going the other way, divide centimeters by 2.54.
Why do some converters give slightly different answers?
Rounding order and unit definitions vary: US customary gallons differ from imperial gallons (3.785 vs 4.546 liters), and some tools round intermediate steps. This converter uses exact internationally-defined factors and rounds only the final display value.