Free Unit Converter

How to use the unit converter

1. Pick what you are converting: length, weight, or temperature.
2. Enter the value and choose the "from" and "to" units.
3. The result updates instantly as you type or switch units.

Conversion tips

Length and weight convert with simple multiplication because they share a true zero — a meter is always 100 centimeters, a pound always 16 ounces. The exact factors used here are the international definitions: one inch is exactly 2.54 centimeters, one pound exactly 0.45359237 kilograms. Temperature is the odd one out because Celsius and Fahrenheit start at different zeros, so it needs an offset as well as a multiplier: °F = °C × 9/5 + 32. A handy anchor set: 0°C is 32°F (freezing), 20°C is 68°F (room temperature), 37°C is 98.6°F (body temperature), and 100°C is 212°F (boiling). For cooking, remember that US cups are volume while grams are weight — converting between them depends on the ingredient's density, so a dedicated cooking converter beats a generic one there. Results here are shown to six decimal places, which is more precision than any tape measure or kitchen scale will ever need.

Frequently asked questions