Why Use This Tool?
Weight spans nine orders of magnitude from micrograms in medicine to tons in shipping — and the US, UK, and everyone else use different units. This converter covers the full range, from micrograms to US tons, converting your value into all of them at once.
The stone (14 pounds) still appears on British bathroom scales, and US tons differ from metric tonnes by about 10% — both are here so international comparisons stay honest.
How It Works
- Enter the weight value.
- Pick the source unit and the target unit.
- Read every conversion at once, with your target highlighted.
Frequently Asked Questions
How many pounds are in a kilogram?
Exactly 2.204622621848776 — the kilogram is the SI base unit, so pounds are defined against it. The converter uses the full-precision factor.
How do I convert ounces to grams?
One ounce is 28.349523125 grams. Enter the ounces with ounce as the source unit and read grams from the table.
What is a stone in kilograms?
One stone is 14 pounds, which is 6.35029318 kilograms — still used for body weight in the UK and Ireland.
Tips & Things to Watch
- US ton (2,000 lb) ≠ metric tonne (1,000 kg) — a 10% difference that matters in shipping.
- Medical dosing uses the mcg/mg converter — it's built for precision at tiny scales.
- Body weight: kg to lb is multiply by 2.2, lb to kg is divide by 2.2.