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Instant, accurate conversions across 10 categories. No signup, no paywalls, no nonsense.
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Length
72 conversions
⚖️
Weight & Mass
56 conversions
🌡️
Temperature
6 conversions
🧪
Volume
110 conversions
📐
Area
56 conversions
🚀
Speed
20 conversions
💾
Data Storage
42 conversions
⏱️
Time
56 conversions
🔬
Pressure
30 conversions
⚡
Energy
56 conversions
Popular conversions
Meters → Feet Kilometers → Miles Inches → Centimeters Feet → Meters Kilograms → Pounds Pounds → Kilograms Grams → Ounces Stones → Kilograms Celsius → Fahrenheit Fahrenheit → Celsius Liters → US Gallons Milliliters → Cups Square Meters → Square Feet Acres → Hectares km/h → mph mph → km/h Gigabytes → Megabytes Megabytes → Gigabytes Hours → Minutes Days → Hours
About ClearUnits
ClearUnits is a free online unit converter covering 504+ conversions across 10 measurement categories: length, weight & mass, temperature, volume, area, speed, data storage, time, pressure, and energy.
Every conversion is calculated instantly in your browser — no server round-trips, no loading screens. Results update as you type. All conversion factors follow international standards from NIST and the International Bureau of Weights and Measures.