Unit Converter
Convert length, weight and temperature between metric and imperial.
About this calculator
Switching between metric and imperial units is a daily friction point — recipes, travel, fitness, DIY and international shipping all mix systems. This converter handles the three most common categories, length, weight and temperature, with instant two-way conversion.
Length covers everyday pairs like centimeters to inches and meters to feet; weight covers kilograms to pounds and grams to ounces; temperature converts between Celsius and Fahrenheit. Temperature is the special case, because unlike length and weight it needs both a scale factor and an offset — 0°C is 32°F, not 0°F — which this tool applies correctly.
Each conversion is reversible: enter a value on either side and the other updates immediately. As with every tool here, the math runs entirely in your browser, so nothing you type leaves your device.
Frequently asked questions
How do I convert cm to inches?
Divide the number of centimeters by 2.54. For example, 30 cm ÷ 2.54 ≈ 11.81 inches.
How do I convert Celsius to Fahrenheit?
Multiply the Celsius value by 9/5 and add 32. So 20°C × 9/5 + 32 = 68°F.
How do I convert kg to lbs?
Multiply kilograms by 2.20462. For example, 70 kg × 2.20462 ≈ 154.3 lbs.