Unit Converter — Step-by-Step Solutions
The Unit Converter instantly converts between common units across six categories: length, weight, temperature, volume, area, and speed. Simply select your category, choose the units to convert between, and enter a value.
The converter shows the conversion formula and factor used, making it easy to understand and verify the result.
Common Length Conversions
| 1 inch = 2.54 cm |
| 1 foot = 0.3048 m |
| 1 yard = 0.9144 m |
| 1 mile = 1.60934 km |
| 1 cm = 0.393701 in |
| 1 km = 0.621371 mi |
Your calculations will appear here
How to Use the Unit Converter
- Select the conversion category: Length, Weight, Temperature, Volume, Area, or Speed.
- Choose the unit to convert from and to using the dropdowns.
- Enter a value and see the instant conversion result.
- Use the swap button to reverse the conversion direction.
Formula and Theory
Unit conversion relies on conversion factors expressing how many of one unit equal another.
The metric system uses powers of 10, making conversions straightforward. Converting between metric and imperial requires specific factors.
Temperature conversions are different as they involve both multiplication and addition (different zero points).
Worked Examples
Example 1: Length
Problem: 5 km to miles
Solution: 5 x 0.621371
Answer: 3.107 miles
Example 2: Temperature
Problem: 100 degrees F to C
Solution: (100 - 32) x 5/9 = 68 x 5/9
Answer: 37.78 degrees C
Example 3: Weight
Problem: 10 lb to kg
Solution: 10 x 0.453592
Answer: 4.536 kg
Frequently Asked Questions
How do I convert metric to imperial?
Why is temperature conversion different?
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