Weight Converter

Convert milligrams, grams, kilograms, tonnes, ounces, pounds, stone, and US/Imperial tons without confusing mass with pound-force or kilogram-force.

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—1 source unit equals

—Units compared

—Reference unit

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Conversion verification

Inspect the active unit pair, formula or exact definition, displayed result and reverse-check evidence. This verification layer reads the current tool state and does not replace the converter itself.

Use the converter above, then refresh the verification.

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Core conversion workflows

Start with a broad dimension converter or jump to the most common metric/imperial pairs. Specialist converters remain available from the full hub.

All 134 converters

Unit ConverterAll-in-one measurement conversion Length ConverterMetric and imperial length units Weight ConverterMass and weight units Temperature ConverterCelsius, Fahrenheit and Kelvin Inches → CMExact 2.54 conversion CM → InchesReverse exact length conversion KG → LBSKilograms to pounds LBS → KGPounds to kilograms °F → °CFahrenheit to Celsius °C → °FCelsius to Fahrenheit Miles → KMMiles to kilometers KM → MilesKilometers to miles

How to use this Weight Converter

Convert common mass units in either direction and compare the same mass across metric, avoirdupois, stone, and ton units.

Definitions and conversion limits

This page converts mass units. Pound-force and kilogram-force are force units and belong in Force/Torque converters.