Unit Converter
Convert between different units instantly.
Temperature
Length (cm to inches)
Weight (kg to lbs)
Distance (km to miles)
How to use the Unit Converter
Need to quickly convert between metric and imperial units? This tool handles temperature, length, weight, and distance conversions all in one page — no switching between tools required.
- 1
Choose the conversion type
Find the section for the unit type you need: Temperature (°C ↔ °F), Length (cm ↔ inches), Weight (kg ↔ lbs), or Distance (km ↔ miles).
- 2
Enter a value
Type a number in either input field within the section. Both fields accept input, so you can convert in either direction — metric to imperial or imperial to metric.
- 3
Click Calculate
The converted value appears in the other field immediately. You can use multiple sections on the same page for different conversion types in one visit.
Frequently asked questions
How do I convert Celsius to Fahrenheit?
The formula is F = (C × 9/5) + 32. For example, 100 °C = (100 × 1.8) + 32 = 212 °F — the boiling point of water. To go the other way: C = (F − 32) × 5/9.
How many kilograms are in a pound?
1 kilogram = 2.20462 pounds. Conversely, 1 pound = 0.453592 kilograms. To convert a body weight of 70 kg: 70 × 2.20462 = 154.32 lbs.
How many centimeters are in an inch?
1 inch = exactly 2.54 centimeters (by international definition). So 1 cm = 0.3937 inches. A 6-foot person is 72 inches = 182.88 cm.
How many kilometers are in a mile?
1 mile = 1.60934 kilometers. 1 kilometer = 0.62137 miles. A 5K race is about 3.1 miles; a marathon (42.195 km) is about 26.2 miles.
What is the difference between SI and imperial units?
SI (International System of Units) — the metric system — uses meters, kilograms, and liters with a consistent base-10 structure. Imperial units (inches, pounds, gallons) are used primarily in the United States and lack a consistent scaling factor.
How precise are the conversions?
Conversions are calculated using standard conversion factors and displayed to two decimal places, which is sufficient for everyday use. For scientific or engineering precision, carry more decimal places through your calculations.