Unit Converter

Convert between hundreds of units across 9 categories — length, weight, temperature, volume, speed, area, data storage, pressure, and energy. Instant, accurate, free.

3.280839895ft
1 m = 3.280839895 ft (MeterFoot)

Popular Length Conversions

1 Meter in all units

Meter

1 m

Kilometer

0.001 km

Centimeter

100 cm

Millimeter

1,000 mm

Micrometer

1,000,000 μm

Nanometer

1,000,000,000 nm

Mile

0.000621371 mi

Yard

1.093613298 yd

Foot

3.280839895 ft

Inch

39.37007874 in

Nautical Mile

0.000539957 nmi

Light Year

1.056971e-16 ly

Astronomical Unit

6.684492e-12 AU

Free Unit Converter — All-in-One

Our unit converter covers 9 measurement categories with hundreds of unit combinations. Whether you're converting kilometers to miles for a road trip, Celsius to Fahrenheit for cooking, kilograms to pounds for fitness, or gigabytes to megabytes for file sizes — everything is calculated instantly in your browser with no sign-up required.

Categories Covered

Length

Meter, Kilometer, Mile, Foot, Inch, Yard, Nautical Mile, Light Year, and more

Weight / Mass

Kilogram, Pound, Ounce, Stone, Metric Ton, Carat, and more

Temperature

Celsius, Fahrenheit, Kelvin, and Rankine

Volume

Liter, Gallon, Quart, Pint, Cup, Fluid Ounce, Tablespoon, and more

Speed

km/h, mph, m/s, Knot, Mach, Foot per Second

Area

Square Meter, Acre, Hectare, Square Mile, Square Foot, and more

Data Storage

Bit, Byte, KB, MB, GB, TB, PB, and their bit equivalents

Pressure

Pascal, Bar, PSI, Atmosphere, Torr, and more

Energy

Joule, Calorie, BTU, kWh, Foot-pound, and more

Frequently Asked Questions

How do I convert kilometers to miles?
Select "Length" category, choose Kilometer as the From unit and Mile as the To unit, then enter your value. 1 kilometer = 0.621371 miles.
How do I convert Celsius to Fahrenheit?
Select "Temperature", choose Celsius → Fahrenheit. The formula is °F = (°C × 9/5) + 32. So 100°C = 212°F.
How do I convert kg to lbs?
Select "Weight / Mass", choose Kilogram → Pound. 1 kilogram = 2.20462 pounds.
How do I convert cups to milliliters?
Select "Volume", choose Cup (US) → Milliliter. 1 US cup = 236.588 mL.
Is this unit converter accurate?
Yes. All conversion factors are based on international standard definitions (SI system). Temperature uses exact mathematical formulas, not factors.
Does this work offline?
Yes. All calculations run entirely in your browser with no server requests. Once the page loads, it works without an internet connection.

The Most Complete Free Unit Converter Online

From everyday conversions like miles to kilometers and pounds to kilograms, to scientific units like Pascals, electronvolts, and light years — our converter handles them all. The "all units" view shows your input converted into every unit in the category simultaneously, making it easy to compare values at a glance.

Popular searches: unit converter · km to miles · celsius to fahrenheit · kg to lbs · meters to feet · liters to gallons · mph to kmh · acres to hectares · GB to MB · psi to bar · BTU to joules · cup to ml · inches to cm · ounces to grams