Unit Converters

Length Converter

Convert between meters, kilometers, miles, feet, inches, and more.

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Weight Converter

Convert between kilograms, grams, pounds, ounces, and other weight units.

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Temperature Converter

Convert between Celsius, Fahrenheit, and Kelvin instantly.

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Area Converter

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

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Volume Converter

Convert volume between liters, gallons, cubic meters, and other units.

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Each Converter

Convert counting units — each, pair, dozen, score, and gross.

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Time Converter

Convert time between seconds, minutes, hours, days, weeks, and years.

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Digital Converter

Convert numbers between binary, octal, decimal, and hexadecimal.

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Parts Per Converter

Convert ppm, ppb, ppt, percent, and permille.

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Speed Converter

Convert speed between km/h, mph, m/s, knots, and more.

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Pace Converter

Convert running pace between min/km, min/mile, and other formats.

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Pressure Converter

Convert pressure between Pascal, bar, psi, atm, and mmHg.

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Current Converter

Convert electric current between amperes, milliamperes, and kiloamperes.

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Voltage Converter

Convert voltage between volts, millivolts, and kilovolts.

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Power Converter

Convert power between watts, kilowatts, megawatts, and horsepower.

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Reactive Power Converter

Convert reactive power (VAR, kVAR, MVAR).

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Apparent Power Converter

Convert apparent power (VA, kVA, MVA).

Use Apparent Power Converter

Energy Converter

Convert energy between joules, calories, kWh, and more.

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Reactive Energy Converter

Convert reactive energy (VARh, kVARh, MVARh).

Use Reactive Energy Converter

Volumetric Flow Rate Converter

Convert flow rate between m³/s, L/min, gal/min, and more.

Use Volumetric Flow Rate Converter

Illuminance Converter

Convert illuminance between lux, foot-candles, and phot.

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Frequency Converter

Convert frequency between Hz, kHz, MHz, GHz, and rpm.

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Angle Converter

Convert angles between degrees, radians, gradians, and turns.

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Currency Converter

Convert money between major world currencies using live exchange rates.

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Number to Word Converter

Convert numbers into English words.

Use Number to Word Converter

Word to Number Converter

Convert English number words into digits.

Use Word to Number Converter

Torque Converter

Convert torque between N·m, lb·ft, and kgf·m.

Use Torque Converter

Charge Converter

Convert electric charge between coulombs, ampere-hours, and mAh.

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Number to Roman Numerals

Convert Arabic numbers (1–3999) to Roman numerals.

Use Number to Roman Numerals

Roman Numerals to Number

Convert Roman numerals to Arabic numbers.

Use Roman Numerals to Number