Unit Converter
Convert between different units of measurement. Length, weight, temperature, volume, and more. Free online unit converter.
1 m = 0.001 km
m
Meters
km
Kilometers
cm
Centimeters
mm
Millimeters
mi
Miles
yd
Yards
ft
Feet
in
Inches
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Last updated: January 2026
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Frequently Asked Questions
How do I convert between metric and imperial units?
Use these key conversion factors: 1 inch = 2.54 cm, 1 mile = 1.609 km, 1 pound = 0.4536 kg, 1 gallon (US) = 3.785 liters. Multiply to convert from imperial to metric, divide to go the other way. This converter handles all common conversions automatically for length, weight, volume, and more.
What is the difference between US and UK gallons?
A US gallon equals 3.785 liters, while a UK (imperial) gallon equals 4.546 liters. The UK gallon is about 20% larger. This difference also affects pints and fluid ounces. Always check which system is being used, especially for fuel economy figures (MPG) and recipes.
How do I convert Celsius to Fahrenheit?
Use the formula: °F = (°C × 9/5) + 32. For example, 20°C = (20 × 9/5) + 32 = 68°F. To convert Fahrenheit to Celsius: °C = (°F - 32) × 5/9. Quick reference: 0°C = 32°F (freezing), 100°C = 212°F (boiling), 37°C = 98.6°F (body temperature).
What are the common data storage unit conversions?
1 kilobyte (KB) = 1,024 bytes, 1 megabyte (MB) = 1,024 KB, 1 gigabyte (GB) = 1,024 MB, 1 terabyte (TB) = 1,024 GB. Note: Storage manufacturers often use 1,000 instead of 1,024, so a '1 TB' drive might show as 931 GB in your system. Network speeds use bits (8 bits = 1 byte).
How do I convert speed units between mph and km/h?
Multiply mph by 1.609 to get km/h, or divide km/h by 1.609 to get mph. Quick conversions: 30 mph ≈ 48 km/h, 60 mph ≈ 97 km/h, 100 km/h ≈ 62 mph. For approximate mental math, multiply mph by 1.6 or divide km/h by 1.6.