Unit Converters
Convert between units of measurement instantly. All 700+ converters work entirely in your browser — fast, accurate, no signup.
Convert between meters, feet, inches, miles, and more.
Convert between square meters, acres, hectares, and more.
Convert between liters, gallons, cups, cubic meters, and more.
Convert between kilograms, pounds, ounces, tons, and more.
Convert between Celsius, Fahrenheit, and Kelvin.
Convert between m/s, km/h, mph, knots, and more.
Convert between seconds, minutes, hours, days, and more.
Convert between bytes, KB, MB, GB, TB, bits, and more.
Convert between newtons, pound-force, dynes, and more.
Convert between pascals, bar, PSI, atmospheres, and more.
Convert between joules, calories, kWh, BTU, and more.
Convert between watts, horsepower, kW, and more.
Convert between degrees, radians, gradians, and more.
Convert between Hertz, Kilohertz, Megahertz, Gigahertz, and more.
Convert between Amps, Milliamps, Microamps, and more.
Convert between Volts, Millivolts, Kilovolts, and more.
Convert between Ohms, Milliohms, Kilohms, Megohms, and more.
About Unit Converters
Our unit converters cover 13 categories of measurement including length, area, volume, weight, temperature, speed, time, data storage, force, pressure, energy, power, and angle. Each converter provides instant results with high precision. All calculations happen in your browser — no data is sent to any server.
Common Questions
Find quick answers to the most searched unit conversion questions. All converters work instantly in your browser — no signup needed.
Length & Distance
- Meter is how many ft? — 1 m = 3.28 ft
- Feet is how many m? — 1 ft = 0.3048 m
- Kilometer is how many mi? — 1 km = 0.6214 mi
- Mile is how many km? — 1 mi = 1.61 km
- Inch is how many cm? — 1 in = 2.54 cm
- Centimeter is how many in? — 1 cm = 0.3937 in
- Yard is how many m? — 1 yd = 0.9144 m
- Nautical Mile is how many km? — 1 NM = 1.85 km
Weight & Mass
- Kilogram is how many lb? — 1 kg = 2.20 lb
- Pound is how many kg? — 1 lb = 0.4536 kg
- Gram is how many oz? — 1 g = 0.0353 oz
- Ounce is how many g? — 1 oz = 28.35 g
- Stone is how many lb? — 1 st = 14 lb
- Ton is how many kg? — 1 t = 1,000 kg
- Pound is how many oz? — 1 lb = 16 oz
- Carat is how many g? — 1 ct = 0.2000 g
Volume & Capacity
- Liter is how many gal? — 1 L = 0.2642 gal
- US Gallon is how many L? — 1 gal = 3.79 L
- Milliliter is how many fl oz? — 1 mL = 0.0338 fl oz
- Cubic Meter is how many L? — 1 m³ = 1,000 L
- US Pint is how many mL? — 1 pt = 473.18 mL
- US Cup is how many mL? — 1 cup = 236.59 mL
- Tablespoon is how many mL? — 1 tbsp = 14.79 mL
- Oil Barrel is how many L? — 1 bbl = 158.99 L
Temperature
- Celsius is how many °F? — 0°C = 32°F, 100°C = 212°F
- Fahrenheit is how many °C? — °C = (°F − 32) × 5/9
- Kelvin is how many °C? — 0 K = −273.15°C
- Celsius is how many K? — K = °C + 273.15
- Fahrenheit is how many °C? — 400°F = 204.44°C
- Celsius is how many °F? — 180°C = 356°F
Speed & Velocity
- km/h is how many mph? — 1 km/h = 0.6214 mph
- mph is how many km/h? — 1 mph = 1.61 km/h
- Knot is how many km/h? — 1 kn = 1.85 km/h
- m/s is how many km/h? — 1 m/s = 3.60 km/h
- Mach is how many km/h? — 1 M = 1234.80 km/h
Area & Land
- Square Meter is how many ft²? — 1 m² = 10.76 ft²
- Square Foot is how many m²? — 1 ft² = 0.0929 m²
- Acre is how many m²? — 1 ac = 4046.86 m²
- Hectare is how many ac? — 1 ha = 2.47 ac
- Square Kilometer is how many mi²? — 1 km² = 0.3861 mi²
- Square Yard is how many ft²? — 1 yd² = 9 ft²
Data & Digital Storage
- Gigabyte is how many MB? — 1 GB = 1,024 MB
- Megabyte is how many KB? — 1 MB = 1,024 KB
- Terabyte is how many GB? — 1 TB = 1,024 GB
- Megabit is how many MB? — 1 Mb = 0.1250 MB
- Kilobyte is how many B? — 1 KB = 1,024 B
- Petabyte is how many TB? — 1 PB = 1,024 TB
Energy, Power & Pressure
- Horsepower is how many W? — 1 hp = 745.70 W
- Calorie is how many J? — 1 cal = 4.18 J
- Kilowatt-hour is how many J? — 1 kWh = 3.6 million J
- Bar is how many PSI? — 1 bar = 14.50 PSI
- Atmosphere is how many Pa? — 1 atm = 101,325 Pa
- BTU is how many kWh? — 1 BTU = 0.000293 kWh