Online Unit Converter

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Whether you typed unit convertor, unit converter, metric converter, length converter, kg to lbs, celsius to fahrenheit, km to miles, convert units, inches to cm, feet to meters, oz to grams, gallons to liters, MB to GB, mph to km/h, acres to hectares, or yards to meters — you have found the right place. Our Free Online Converter handles them all with 8 specialized tools.

Popular Conversions

Length:
1 inch = 2.54 cm
1 foot = 30.48 cm
1 mile = 1.609 km
1 yard = 0.9144 m
1 meter = 3.281 feet
Weight:
1 kg = 2.205 lbs
1 lb = 453.6 g
1 oz = 28.35 g
1 stone = 6.35 kg
1 ton = 1000 kg
Temperature:
0°C = 32°F
100°C = 212°F
37°C = 98.6°F
°F = °C × 9/5 + 32
°C = (°F − 32) × 5/9
Speed:
1 mph = 1.609 km/h
1 knot = 1.852 km/h
100 km/h = 62.14 mph
1 m/s = 3.6 km/h
Mach 1 = 343 m/s
Volume:
1 gallon = 3.785 liters
1 cup = 236.6 mL
1 fl oz = 29.57 mL
1 pint = 473.2 mL
1 quart = 946.4 mL
Area:
1 acre = 4,047 m²
1 hectare = 2.471 acres
1 km² = 247.1 acres
1 ft² = 0.0929 m²
1 m² = 10.76 ft²
Data:
1 KB = 1,024 bytes
1 MB = 1,024 KB
1 GB = 1,024 MB
1 TB = 1,024 GB
1 PB = 1,024 TB
Time:
1 hour = 3,600 sec
1 day = 86,400 sec
1 week = 604,800 sec
1 year = 365.25 days
1 min = 60,000 ms

Frequently Asked Questions

How many centimeters are in an inch?

There are exactly 2.54 centimeters in one inch. To convert inches to cm, multiply by 2.54. To convert cm to inches, divide by 2.54. For example, 12 inches = 30.48 cm.

How do I convert Celsius to Fahrenheit?

Multiply the Celsius temperature by 9/5 (or 1.8), then add 32. Formula: °F = (°C × 9/5) + 32. For example, 25°C = (25 × 1.8) + 32 = 77°F. For Fahrenheit to Celsius: °C = (°F − 32) × 5/9.

How many pounds are in a kilogram?

One kilogram equals approximately 2.205 pounds. To convert kg to lbs, multiply by 2.205. To convert lbs to kg, multiply by 0.4536. For example, 70 kg = 154.3 lbs.

How many kilometers are in a mile?

One mile equals approximately 1.609 kilometers. To convert miles to km, multiply by 1.609. To convert km to miles, multiply by 0.6214. For example, 5 miles = 8.045 km, and a marathon (42.195 km) = 26.2 miles.

How many liters are in a gallon?

One US gallon equals approximately 3.785 liters. To convert gallons to liters, multiply by 3.785. To convert liters to gallons, divide by 3.785. Note: a UK (imperial) gallon is larger, equaling 4.546 liters.

What is the difference between MB and GB?

One gigabyte (GB) equals 1,024 megabytes (MB). Data storage units follow powers of 1,024: 1 KB = 1,024 bytes, 1 MB = 1,024 KB, 1 GB = 1,024 MB, 1 TB = 1,024 GB. A typical photo is 3-5 MB, a movie is 1-4 GB.

How do I convert feet to meters?

Multiply feet by 0.3048 to get meters. One foot = 0.3048 m, and one meter = 3.281 feet. For example, 6 feet = 1.829 meters. A quick estimate: divide feet by 3.3 for an approximate meter value.

How fast is 100 km/h in mph?

100 km/h equals approximately 62.14 mph. To convert km/h to mph, multiply by 0.6214. To convert mph to km/h, multiply by 1.609. For example, 60 mph = 96.56 km/h, and highway speed of 120 km/h = 74.56 mph.