Unit Converter
Convert between common units of length, weight, temperature, area, and volume.
The Unit Converter handles the most frequently needed conversions between metric and imperial units: length (kilometers, miles, feet, inches, meters, centimeters), weight (kilograms, pounds, ounces, grams), temperature (Celsius, Fahrenheit, Kelvin), area (square meters, square feet, acres, hectares), and volume (liters, gallons, fluid ounces, milliliters). Whether you're reading a US recipe in a metric country, checking a marathon distance, calculating room area for flooring, or interpreting a weather forecast in a different unit system, this tool provides instant and accurate results.
Unit Converter
Examples
5 km to Miles
Convert 5 kilometers to miles (useful for 5K race planning).
→ 3.107 miles
Body Weight: 70 kg to Pounds
Convert 70 kilograms to pounds.
→ 154.32 pounds
Oven Temperature: 180°C to Fahrenheit
Convert baking temperature 180°C to Fahrenheit.
→ 356°F
Apartment Size: 85 m² to Square Feet
Convert an 85 square meter apartment to square feet.
→ 914.9 sq ft
Tips
- ✓Quick mental math: km × 0.6 ≈ miles | kg × 2.2 ≈ lbs | °C × 2 + 30 ≈ °F (rough estimate).
- ✓For cooking: 1 cup = 240 ml, 1 tablespoon = 15 ml, 1 teaspoon = 5 ml.
- ✓Marathon distance: 42.195 km = 26.2 miles.
- ✓A hectare (10,000 m²) is approximately 2.47 acres.
Frequently Asked Questions
How do I convert Celsius to Fahrenheit?
°F = (°C × 9/5) + 32. Common reference points: 0°C = 32°F (freezing), 100°C = 212°F (boiling), 37°C = 98.6°F (body temperature), 20°C = 68°F (room temperature).
How many kilometers in a mile?
1 mile = 1.60934 kilometers. Conversely, 1 km = 0.62137 miles. Quick estimate: multiply km by 0.6 to get approximate miles.
How many pounds in a kilogram?
1 kg = 2.20462 pounds. 1 pound = 0.453592 kg. Quick estimate: multiply kg by 2.2 to get approximate pounds.
How do I convert square feet to square meters?
1 square foot = 0.0929 square meters. 1 square meter = 10.764 square feet. Example: a 500 sq ft apartment ≈ 46.5 square meters.
How many liters in a gallon?
US gallon: 1 gallon = 3.785 liters. UK/Imperial gallon: 1 gallon = 4.546 liters. For fuel efficiency: US mpg ÷ 0.4251 = km/L (or × 1.609 = km/gallon).
What is the difference between metric and imperial units?
The metric system (SI units) is based on powers of 10 and used by most countries: meters, kilograms, liters, Celsius. The imperial system is primarily used in the United States: feet, pounds, gallons, Fahrenheit. The UK uses a mix of both in daily life.
How do I convert inches to centimeters?
1 inch = 2.54 centimeters. 1 cm = 0.3937 inches. Example: 6 feet = 72 inches = 72 × 2.54 = 182.9 cm.
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