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).

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Energy Converter

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

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Reactive Energy Converter

Convert reactive energy (VARh, kVARh, MVARh).

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Volumetric Flow Rate Converter

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

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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.

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Word to Number Converter

Convert English number words into digits.

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Torque Converter

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

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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.

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Roman Numerals to Number

Convert Roman numerals to Arabic numbers.

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