Free online unit converter for length, weight and temperature. Enter a value and convert between common units instantly — simple and handy for everyday life and work.
Recipes use grams, ovens use Fahrenheit, parcels use pounds, screens use inches, heights abroad use feet — daily life constantly switches systems. Memorise a few (°C×9/5+32=°F, kg×2.2≈lb, inch×2.54=cm) for mental maths, and use a tool when precision matters.
Most conversion factors aren't whole numbers (1 inch = 2.54 cm is exact, but 1 lb ≈ 453.592 g is usually rounded), so different sources round to different decimals and results vary slightly. Fine for cooking; for engineering or dosing, keep more decimals and use a precise converter.
This tool covers length, weight, temperature, area and volume so you don't look each up separately. For time, see our Unix timestamp tool; for ratios and percentage change, use the percentage calculator.
Length (cm, m, inch, ft…), weight (g, kg, lb, oz) and temperature (°C, °F).
Results are rounded sensibly for readability, with enough precision for everyday use.