Weight Converter

How many pounds is 70 kilograms? How many grams in four ounces of butter? And what does 11 stone actually mean? This weight converter answers all of that live, covering milligrams, grams, kilograms, tonnes, ounces, pounds and stone in a single tool.

Conversions use the exact international avoirdupois definitions: one pound is exactly 0.45359237 kg, one ounce exactly 28.349523125 g, and one stone exactly 6.35029318 kg (14 pounds). Metric units relate by powers of ten. Results are rounded only for display to sensible significant digits — no floating-point noise, no drifting rules of thumb.

The converter runs entirely in your browser: no upload, no account, and it keeps working offline once the page has loaded. Type in either field — both directions stay in sync — press swap to reverse units, and use the table of common values under the result, tuned to the units you picked (body weights for stone, cooking amounts for ounces).

It is built for daily situations: body weight on foreign forms and fitness apps, US recipes on a metric kitchen scale, airline baggage allowances, gym plates marked in the other system and parcel weights for international shipping.