Free Online Unit Converter
Instantly convert between metric and imperial units. Convert miles to kilometers, pounds to kilograms, Celsius to Fahrenheit, and 50+ other unit conversions - all free, no signup required.
1 m=0 km
Common Conversions
Instant Conversion
Results update as you type - no buttons to click
8 Categories
Length, weight, temperature, area, volume, speed, time, data
Accurate Results
Precise conversions with proper decimal handling
How to Use This Unit Converter
Converting units has never been easier. Whether you need to convert miles to kilometers for a road trip, pounds to kilograms for a recipe, or Celsius to Fahrenheit for weather, our free online unit converter handles it all instantly.
Simply select your category (length, weight, temperature, etc.), choose your units, enter a value, and see the result immediately. You can also type in the result field to convert in reverse - perfect for when you know the target value and need the source.
Popular Unit Conversions
Length Conversions
- Miles to Kilometers (mi to km)
- Feet to Meters (ft to m)
- Inches to Centimeters (in to cm)
- Yards to Meters (yd to m)
Weight Conversions
- Pounds to Kilograms (lbs to kg)
- Ounces to Grams (oz to g)
- Stone to Pounds (st to lb)
- Kilograms to Pounds (kg to lbs)
Temperature Conversions
- Celsius to Fahrenheit (°C to °F)
- Fahrenheit to Celsius (°F to °C)
- Celsius to Kelvin (°C to K)
- Kelvin to Fahrenheit (K to °F)
Volume Conversions
- Gallons to Liters (gal to L)
- Cups to Milliliters (cup to mL)
- Fluid Ounces to mL (fl oz to mL)
- Liters to Gallons (L to gal)
Frequently Asked Questions
How do I convert miles to kilometers?
Select "Length" category, choose "Mile" as the from unit and "Kilometer" as the to unit, then enter your value. 1 mile equals approximately 1.609 kilometers.
What's the formula to convert Celsius to Fahrenheit?
The formula is: °F = (°C × 9/5) + 32. For example, 20°C = (20 × 9/5) + 32 = 68°F. Our converter does this calculation instantly for you.
How many pounds are in a kilogram?
1 kilogram equals approximately 2.205 pounds. To convert kg to lbs, multiply the kilogram value by 2.205.
Is this unit converter free to use?
Yes! Our unit converter is completely free with no signup required. Convert as many units as you need, anytime.