Conversion library

Weight converters

Move accurately between metric mass units, pounds, ounces, stones, carats, and common ton definitions.

11 units110 directional pairsExact formulas

Common starting points

Popular weight conversions

Kilogram to Pound Pound to Kilogram Gram to Ounce Ounce to Gram Stone to Kilogram Metric ton to US short ton

Essential context

Understanding weight conversions

These conversions compare mass units used in metric, avoirdupois, jewelry, shipping, and British contexts. Everyday language often says weight, while the numerical relationships here convert mass.

Precision and rounding

Use the precision of the source measurement. Recipes may tolerate rounded grams, whereas laboratory, freight, and gemstone calculations often need more digits.

A distinction that matters

Metric tons, US short tons, and Imperial long tons are three different quantities. Always retain the full unit name when converting or reporting a result.

Complete directory

Browse by starting unit

Choose the unit you have, then select the unit you need. Every destination opens a dedicated static page with an interactive converter, formula, worked example, and reference table.

From Microgram

μg

From Milligram

From Gram

From Kilogram

From Metric ton

From Carat

From Ounce

From Pound

From Stone

From US short ton

short ton

From Imperial long ton

long ton

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