Unit Converter

Convert between units of length, weight, and temperature. Quick and accurate unit conversions.

Value

From

Quick Reference

1 inch = 2.54 cm

1 foot = 30.48 cm

1 meter = 3.281 feet

1 mile = 1.609 km

Convert Between Units

Convert between different units of length, weight, and temperature. Our calculator supports both metric and imperial units for easy conversions.

Supported Conversions

Length: mm, cm, m, km, inches, feet, yards, miles
Weight: mg, g, kg, tonnes, ounces, pounds, stones
Temperature: Celsius, Fahrenheit, Kelvin

Common Conversions

Length

1 inch = 2.54 centimeters
1 foot = 30.48 centimeters
1 mile = 1.609 kilometers
1 meter = 3.281 feet

Weight

1 pound = 0.454 kilograms
1 kilogram = 2.205 pounds
1 ounce = 28.35 grams
1 stone = 6.35 kilograms

Temperature

0°C = 32°F (freezing point of water)
100°C = 212°F (boiling point of water)
-40°C = -40°F (where both scales meet)

Metric vs Imperial

The metric system is based on powers of 10, making conversions within the system simple (1 km = 1000 m = 100,000 cm). The imperial system has less regular conversion factors (1 mile = 1760 yards = 5280 feet).

Frequently Asked Questions

How do I convert between metric and imperial units?

Select the unit category (length, weight, or temperature), enter your value, and choose the units to convert from and to. The calculator handles the conversion automatically.

What is the difference between metric and imperial?

Metric uses base-10 units (meters, grams, liters) used worldwide. Imperial uses feet, pounds, gallons and is primarily used in the US. Most scientific work uses metric.

How do I convert Celsius to Fahrenheit?

The formula is F = C × 9/5 + 32. For example, 20°C = 20 × 1.8 + 32 = 68°F. Our calculator handles this automatically.