Unit Converter
Convert 77 metric, imperial and technical units across 12 categories, from centimeters and pounds to psi, kilowatt-hours, horsepower and radians. Calculations stay on your device, update instantly and show every unit in the selected category.
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Your value in every unit
How to use the Unit Converter
- 1 Pick one of 12 categories: length, weight, temperature, speed, area, volume, data, time, pressure, energy, power or angle.
- 2 Type a value and choose the units to convert from and to — the result updates live.
- 3 Use the table below to see your value in every unit of that category at once.
Frequently asked questions
Which unit categories are included?
Length, weight, temperature, speed, area, volume, digital storage, time, pressure, energy, power and angle — 77 units for everyday and technical conversions.
How accurate are the conversions?
Standard international definitions are used (1 inch = 2.54 cm exactly, 1 lb = 0.45359237 kg exactly, and so on). Results are computed at full float precision — no rounding until display.
How does temperature conversion work?
Temperature uses offset formulas rather than simple factors: °F = °C × 9/5 + 32, and K = °C + 273.15. The converter applies these exactly, including negative temperatures.