Free Online Unit Converter

15 unit converters covering length, weight, temperature, speed, volume, area, data, cooking, land, currency, pressure, energy, angle, force, and power. Instant, accurate, free.

Converters

Length Converter

Convert between meters, kilometers, miles, feet, inches, and more. 10+ length units supported.

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Weight Converter

Convert between kilograms, pounds, ounces, grams, stones, and more. 8+ weight units.

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Temperature Converter

Convert Celsius, Fahrenheit, and Kelvin instantly with precise formulas.

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Speed Converter

Convert km/h, mph, knots, m/s, and more speed units for any use case.

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Volume Converter

Convert liters, gallons, cups, milliliters, and other volume units.

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Area Converter

Convert square meters, acres, hectares, square feet, and more area units.

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Data Converter

Convert bytes, KB, MB, GB, TB, and other digital storage units.

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Cooking Converter

Convert cups, tablespoons, teaspoons, grams, milliliters for cooking.

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Land Converter

Convert Bigha, Guntha, Katha, hectares, acres for Indian land measurement.

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Currency Converter

Convert USD, INR, EUR, GBP, JPY and other major world currencies.

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Pressure Converter

Convert psi, bar, atm, pascals, torr, and mmHg pressure units.

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Energy Converter

Convert joules, calories, kWh, BTU, and other energy units.

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Angle Converter

Convert degrees, radians, gradians, and angle measurement units.

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Force Converter

Convert newtons, pound-force, dynes, and kilogram-force units.

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Power Converter

Convert watts, horsepower, BTU/hr, and other power units.

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How It Works

Step 1

Choose a Converter

Pick from 15 unit converters — length, weight, temperature, currency, and more.

Step 2

Enter Your Value

Type in the value and select the units you want to convert from and to.

Step 3

Get Instant Results

See the converted value instantly, with a conversion table and all supported units.

FAQ

Is FreeUnitKit really free?

Yes, 100% free. No sign-up, no usage limits. Use all 15 converters without any restriction.

How many unit types are supported?

FreeUnitKit covers 15 unit categories: length, weight, temperature, speed, volume, area, data storage, cooking, land, currency, pressure, energy, angle, force, and power.

Are the currency rates real-time?

Currency conversion uses reference rates. You can also set custom rates for manual calculations.

Is my data safe?

Absolutely. All conversions happen in your browser. No data is ever sent to any server.

Can I use this on mobile?

Yes, FreeUnitKit is fully responsive and works on any device with a modern browser.

Do I need to install anything?

No. FreeUnitKit works entirely in your browser. No downloads, no extensions, no sign-up required.