Unit Converter

Convert any unit across 12 categories with conversion tables and precision control

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Result

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Conversion Formula

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How to Use Unit Converter

Choose category

Select the type of unit (length, weight, volume, temperature, etc.).

Enter value

Type the value and select the source and target units.

View result

See the converted value instantly.

Why Choose AllTools Unit Converter?

  • ✓ 100% free, no account needed
  • ✓ No data stored or transmitted
  • ✓ Length, weight, volume, temperature
  • ✓ Speed, area, time, data units
  • ✓ Instant conversion
  • ✓ 12 categories including Pressure, Energy, Power, Fuel Economy
  • ✓ Decimal precision control (0-10)
  • ✓ Full conversion table for all units
  • ✓ Copy result to clipboard
  • ✓ Popular conversion quick-links

Frequently Asked Questions

What types of units can I convert? ▼
Length, weight, volume, temperature, speed, area, time, digital storage, pressure, energy, power, and fuel economy.
Is this unit converter accurate? ▼
Yes. All conversion factors are based on international standards.
Can I convert metric to imperial? ▼
Yes, the converter supports both metric and imperial systems.
Does it support temperature conversion? ▼
Yes, convert between Celsius, Fahrenheit, and Kelvin.
Is there a limit on conversions? ▼
No. Convert as many times as you want, completely free.
Does this work on mobile? ▼
Yes, all AllTools tools are mobile-optimized and work on iOS and Android browsers.
What pressure units are supported? ▼
PSI, bar, atm, Pascal, kPa, mmHg, torr, and more. Great for tire pressure, weather, and engineering calculations.
Can I convert energy and power units? ▼
Yes, convert between joules, calories, kWh, BTU, watt-hours for energy, and watts, horsepower, BTU/h for power.
What is fuel economy conversion? ▼
Convert between MPG (US), MPG (UK), L/100km, and km/L to compare fuel efficiency across different measurement systems.
Can I control decimal precision? ▼
Yes, use the precision slider to set anywhere from 0 to 10 decimal places for your conversion results.

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