How the weight converter works
Last updated 10 November 2026
This converter uses exact definitions of each unit, so results are as accurate as the number you enter.
How it works
- Each unit is defined as a fixed number of kilograms.
- A stone is 14 pounds.
Worked example
With the starting figures:
- 70.0000 kg is 154.323584 lb.
Everyday conversions
South African food, luggage and bathroom scales use kilograms and grams. Imported recipes, gym equipment and online shops often use pounds and ounces. This converter moves between them and shows the answer in every unit.
Units included
- Milligrams, grams, kilograms and tonnes
- Ounces and pounds
- Stones, where one stone is fourteen pounds
Exact definitions
Each unit is defined as a fixed number of kilograms, so the answer is exact. The ounces here are ordinary ones, the kind used for food and parcels, and not the troy ounces used for precious metals. If you are weighing gold or silver, check which ounce your source uses.
Handy reminders
- A kilogram is a little more than two pounds.
- A tonne is a thousand kilograms.
- Airline baggage limits are normally in kilograms, so convert before you pack from a list in pounds.
Common mistakes
Confusing grams with kilograms changes the answer a thousandfold. Another is mixing up weight and volume. A litre of water weighs a kilogram, but a litre of flour does not. For volumes use the volume converter.
A short example
Suppose a gym plate is marked in pounds and your programme is in kilograms. Enter the pounds, pick pounds as the unit you have and kilograms as the unit you want, and read the answer. The table beneath also lists grams, ounces and stones, so you can compare labels without converting again.
Things to watch
- Ounces here are ordinary (avoirdupois) ounces, not troy ounces used for precious metals.
The conversion factors are definitions, not measurements. They are listed with their source in the data notes. Nothing you enter is stored or sent.
Like every tool on MoneyMzansi, this one runs entirely in your browser. There is no account, no upload and no sign-up, so it keeps working even if your connection drops once the page has loaded.