Unit Converter

Convert between length, weight, temperature, area, volume, speed, data, energy and pressure units instantly.

📏 Length Converter

Result

Enter a value and click Convert.

All Length Units

Meter (m)1
Kilometer (km)0.001
Centimeter (cm)100
Millimeter (mm)1000
Mile (mi)0.0006213711922
Yard (yd)1.093613298
Foot (ft)3.280839895
Inch (in)39.37007874
Nautical Mile0.0005399568035

The Only Unit Converter You Need

Our Free Unit Converter covers 9 major categories and over 70 units — all in one tool. Whether you are a student converting meters to feet, an engineer calculating pressure in PSI, or a chef converting cups to milliliters, this tool gives you instant, accurate results with no signup required.

Every conversion uses precise scientific factors. Temperature conversions handle the special Celsius, Fahrenheit, and Kelvin formulas correctly. Data units use binary (1024-based) calculations for accurate byte conversions. All other units use standard SI-based factors.

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9 Categories

Length, Weight, Temperature, Area, Volume, Speed, Data, Energy and Pressure — all covered in one tool.

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70+ Units

From Nanometers to Nautical Miles, Bytes to Terabytes — all units available with one click.

Instant Results

See all unit conversions at once in the quick reference panel — no need to convert one by one.

How Unit Conversion Works

The math behind every conversion

Universal Conversion Formula

Result = (Value × Factor_from) ÷ Factor_to
°F = (°C × 9/5) + 32  |  K = °C + 273.15

All factors relative to SI base unitTemperature uses direct formulas

Common Conversion Examples

1 Mile = 1.60934 kmLength
1 Pound = 0.453592 kgWeight
100°F = 37.78°CTemperature
1 Acre = 4046.86 m²Area
1 Gallon = 3.78541 LVolume
1 GB = 1024 MBData

Category Reference

CategoryBase UnitUnits
📏 LengthMeter9
⚖️ WeightKilogram8
🌡️ TemperatureCelsius3
📐 Area9
🧪 VolumeLiter9
🚀 Speedm/s5
💾 DataByte6
⚡ EnergyJoule7
🔵 PressurePascal6

Who Uses This Converter?

🎓 Students

Convert units for physics, chemistry, and math problems instantly. No more manual formula lookups — just select, enter, and get your answer.

🔧 Engineers

Switch between metric and imperial units for pressure, energy, and speed calculations with precision. Essential for mechanical and civil engineering work.

✈️ Travelers

Convert miles to kilometers, Fahrenheit to Celsius, and gallons to liters when traveling between countries that use different measurement systems.

👨‍🍳 Chefs & Bakers

Convert cups to milliliters, tablespoons to grams, and ounces to kilograms when scaling recipes or following international cooking instructions.

💻 Developers

Convert bytes to megabytes, kilobytes to gigabytes instantly. Essential for calculating file sizes, memory allocation, and storage requirements.

🏗️ Real Estate

Convert square meters to square feet, acres to marlas, and hectares to kanals — covering both international and South Asian property measurement units.

Unit Converter FAQ

How do I convert meters to feet?

Select the Length category, choose Meter in the From field and Foot in the To field, enter your value, and click Convert. 1 meter = 3.28084 feet.

How is temperature conversion different?

Temperature uses direct formulas — not simple multiplication. For example, 0°C = 32°F. Our calculator handles Celsius, Fahrenheit, and Kelvin conversions automatically using the correct formulas.

What is the quick reference panel?

The right side panel shows your entered value converted to all units in the selected category at once — so you can see meter, kilometer, foot, mile, and inch all in one view.

What does the Swap button do?

The Swap button flips the From and To units instantly. If you were converting kg to pounds, after swapping it will convert pounds to kg — without re-entering the value.

Are data units binary or decimal?

Our data converter uses binary (1024-based) calculations — so 1 KB = 1024 bytes, 1 MB = 1024 KB, and 1 GB = 1024 MB. This matches how operating systems report file sizes.

Is this Unit Converter free?

Yes, completely free with no signup, no ads, and no hidden charges. Just open and convert.

Convert Anything, Instantly

From bytes to terabytes, meters to miles — every unit you need is right here, free and accurate.

TheCalcX Conversion Suite • Every Unit Covered