How do I convert km to miles?

1 kilometer equals 0.621371 miles. Enter the km value in the length category and select kilometers as the source unit. The result for miles appears instantly. For a quick estimate, multiply km by 0.6.

How do I convert Celsius to Fahrenheit?

Use the formula F = (C × 9/5) + 32. For example, 25°C = (25 × 1.8) + 32 = 77°F. Select Temperature in the unit converter and enter the value in Celsius to see Fahrenheit instantly.

How many kg is 1 pound?

1 pound equals 0.453592 kg. Conversely, 1 kg equals 2.20462 pounds. Enter the weight in the Weight category to convert between kilograms, pounds, grams, ounces, and more.

How do I convert square feet to square metres?

1 square foot equals 0.0929 square metres. Enter the value in the Area category. The tool also supports acres, hectares, square km, and square miles alongside sq ft and sq m.

How do I convert litres to gallons?

1 litre equals 0.264172 US gallons or 0.219969 UK gallons. Select Volume in the unit converter for conversions between litres, millilitres, gallons, pints, and fluid ounces.

Unit Converter

Convert between units of length, weight, temperature, area, volume, and speed instantly.

Unit converter handles conversions across 6 categories: length, weight, temperature, area, volume, and speed. Select a category and enter a value. Results appear instantly in all common units for that category, alongside a full reference table. All calculations run in the browser with no server calls. Free, no signup required.

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Frequently Asked Questions

How do I convert km to miles?: 1 kilometer equals 0.621371 miles. Enter the km value in the length category and select kilometers as the source unit. The result for miles appears instantly. For a quick estimate, multiply km by 0.6.
How do I convert Celsius to Fahrenheit?: Use the formula F = (C × 9/5) + 32. For example, 25°C = (25 × 1.8) + 32 = 77°F. Select Temperature in the unit converter and enter the value in Celsius to see Fahrenheit instantly.
How many kg is 1 pound?: 1 pound equals 0.453592 kg. Conversely, 1 kg equals 2.20462 pounds. Enter the weight in the Weight category to convert between kilograms, pounds, grams, ounces, and more.
How do I convert square feet to square metres?: 1 square foot equals 0.0929 square metres. Enter the value in the Area category. The tool also supports acres, hectares, square km, and square miles alongside sq ft and sq m.
How do I convert litres to gallons?: 1 litre equals 0.264172 US gallons or 0.219969 UK gallons. Select Volume in the unit converter for conversions between litres, millilitres, gallons, pints, and fluid ounces.

What is the unit converter?

The unit converter translates values between measurement units across 6 physical categories: length, weight, temperature, area, volume, and speed. Enter a value and select the source unit. The tool shows the converted result in every other unit for that category, with a reference table below.

All conversions run locally in the browser using fixed multiplication factors and the standard temperature formulas. No data is sent to any server.

Length conversions

Length units covered include metres, kilometres, centimetres, millimetres, miles, yards, feet, and inches. The metric system uses powers of 10. 1 metre is 100 centimetres, 1,000 millimetres, and 0.001 kilometres. The imperial system uses fixed base ratios: 1 foot is 12 inches, 1 yard is 3 feet. 1 mile is 5,280 feet.

Quick references: 1 inch = 2.54 cm, 1 foot = 30.48 cm. 1 mile = 1.609 km. 1 km = 0.621 miles.

Weight and temperature conversions

Weight units include kilograms, grams, milligrams, metric tonnes, pounds, ounces, and stone. Quick references: 1 kg = 2.205 pounds, 1 pound = 453.6 grams, 1 metric tonne = 1,000 kg.

Temperature uses formulas rather than multiplication. Celsius to Fahrenheit: F = (C × 9/5) + 32. Fahrenheit to Celsius: C = (F - 32) × 5/9. Celsius to Kelvin: K = C + 273.15. Water freezes at 0°C, 32°F, and 273.15 K. Normal body temperature is 37°C or 98.6°F.

Area, volume, and speed

Area units include square metres, square kilometres, square feet, square yards, square miles, acres, and hectares. 1 acre = 43,560 square feet. 1 hectare = 10,000 square metres or 2.471 acres.

Volume units include litres, millilitres, cubic metres, US gallons, UK gallons, pints, and fluid ounces. 1 US gallon = 3.785 litres. 1 UK gallon = 4.546 litres.

Speed units include metres per second, kilometres per hour, miles per hour, knots, and feet per second. 1 km/h = 0.278 m/s. 1 mph = 1.609 km/h. A knot is 1 nautical mile per hour, or 1.852 km/h.

Tips for using the unit converter

For temperature, Celsius and Fahrenheit cross at -40°. At -40°C and -40°F, both scales read the same value.
Indian land measurement uses bigha, kanal, and gunta, which vary by state. Use the Land Size Converter for those units.
Speed limit signs in India are in km/h. In the US and UK, they are in mph. 100 km/h equals approximately 62 mph.
For cooking measurements, 1 US cup equals 240 ml and 1 UK cup equals 284 ml. Adjust for the cup standard used in your recipe.

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