UltimateTools
Unit Converters

How to Use the Weight Converter

Enter a weight value and select its current unit — the converter instantly shows the equivalent value in kilograms, pounds, ounces, and stone, applying the exact conversion factors automatically without needing to route manually through an intermediate unit.

The Weight Converter handles all four common units directly — here's what to enter.

Entering a value and unit

Enter a weight and select its current unit — the tool converts it instantly to the other three units, including the stone-and-pounds combined format common in UK contexts, if supported.

Converting a combined stone-and-pounds figure

For a weight given as "X stone Y pounds," check whether the tool accepts that combined format directly — if not, converting the stone portion to pounds first (multiplying by 14) and adding the remaining pounds gives a single figure to enter.

Frequently asked questions

How precise is the conversion?

The tool applies the precise conversion factors (2.20462 for kg to lb, for example) rather than a rounded approximation, giving an accurate result to the displayed decimal precision.

Can I convert body weight and object weight the same way?

Yes — the conversion math is identical regardless of what's being weighed; the units themselves don't distinguish between body weight and any other kind of weight.