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Unit Converter

Length, weight, temperature, volume, speed, and area — the conversions people actually search for, all in one place.

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Most-Searched Conversions

Length

FromToResult
1 milekilometers1.609 km
1 footcentimeters30.48 cm
1 inchmillimeters25.4 mm
100 metersyards109.36 yards
5 feet 10 inchescentimeters177.8 cm
26.2 mileskilometers42.16 km (marathon)

Weight

FromToResult
1 poundkilograms0.4536 kg
1 kilogrampounds2.205 lbs
1 ouncegrams28.35 g
150 lbskilograms68.04 kg
1 stonepounds14 lbs

Temperature

°F°CWhat it means
32°F0°CWater freezes
98.6°F37°CNormal body temperature
72°F22.2°CComfortable room temperature
212°F100°CWater boils (sea level)
350°F176.7°CCommon baking temperature

Why Unit Conversions Matter

The United States is one of only three countries in the world that hasn't fully adopted the metric system — the others are Myanmar and Liberia. This means that Americans traveling internationally, working with international colleagues, or following recipes from other countries regularly need to convert between measurement systems.

For everyday life, the conversions that come up most often are miles to kilometers (for international travel and fitness apps), pounds to kilograms (for international shipping, health, and fitness), and Fahrenheit to Celsius (for cooking and weather). All three are available in this converter.

Frequently Asked Questions

How many feet are in a meter?
1 meter equals approximately 3.281 feet, or 3 feet and 3.37 inches. A meter is slightly longer than a yard (which is 3 feet exactly). For a rough estimate in your head: 1 meter ≈ 3.3 feet.
How many kilometers are in a mile?
1 mile equals 1.609 kilometers. Going the other direction, 1 kilometer equals 0.621 miles. A quick mental shortcut: multiply miles by 1.6 to get approximate kilometers. A 5K race is approximately 3.1 miles.
How do I convert Celsius to Fahrenheit?
Multiply the Celsius temperature by 9/5 (or 1.8), then add 32. Example: 25°C × 1.8 = 45, plus 32 = 77°F. Going the other way: subtract 32 then multiply by 5/9. A quick approximation: double the Celsius number and add 30 (not exact but good for a ballpark).