Unit Converter

Convert between different units of measurement. Support for length, weight, temperature, volume, area, speed, and time conversions.

Result

1,000

1 km=1,000 m

All Length Conversions

Millimeter1,000,000 mm
Centimeter100,000 cm
Inch39,370.07874 in
Foot3,280.839895 ft
Yard1,093.613298 yd
Meter1,000 m
Mile0.621371 mi
Nautical Mile0.539957 nmi

Quick Reference

Length

1 inch = 2.54 cm

1 foot = 30.48 cm

1 mile = 1.609 km

Weight

1 oz = 28.35 g

1 lb = 453.6 g

1 kg = 2.205 lb

Volume

1 cup = 236.6 mL

1 pint = 473.2 mL

1 gallon = 3.785 L

About Unit Conversion

Unit conversion is the process of converting a measurement from one unit to another within the same measurement system or between different systems. This tool supports both the metric (SI) and imperial measurement systems.

Supported Categories

  • Length: Kilometers, meters, miles, feet, inches, and more
  • Weight/Mass: Kilograms, grams, pounds, ounces, stones
  • Temperature: Celsius, Fahrenheit, and Kelvin
  • Volume: Liters, gallons, cups, tablespoons
  • Area: Square meters, acres, hectares, square feet
  • Speed: m/s, km/h, mph, knots
  • Time: Years, days, hours, minutes, seconds

Common Conversions

FromToFormula
1 mile1.60934 kmmi × 1.60934
1 kg2.20462 lbskg × 2.20462
°C to °F°F(°C × 9/5) + 32
1 gallon3.78541 Lgal × 3.78541

Tips for Accurate Conversions

  • Double-check which unit system you're working with
  • US and UK gallons are different (1 UK gallon ≈ 1.2 US gallons)
  • Temperature conversions are not linear—use the correct formula
  • For scientific work, be mindful of significant figures

Frequently Asked Questions

How many unit categories does this converter support?
The converter supports 7 categories: length, weight, temperature, volume, area, speed, and time. Each category includes multiple units spanning both metric and imperial systems. Switch between categories using the buttons at the top of the tool.
Are the conversion factors accurate?
Yes. All conversion factors are based on official SI (International System of Units) definitions. Length uses the meter definition, weight uses the kilogram definition, and temperature uses the Kelvin scale. Results are shown to 6 decimal places for precision.
Can I convert between US and UK gallons?
Yes. The volume category includes both US gallons (3.78541 L) and UK imperial gallons (4.54609 L). They are listed as separate units to avoid confusion. This is important for cooking, fuel economy, and shipping calculations.

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