Free Weight Converter
Convert between kilograms, grams, pounds, ounces and stone.
Type a weight, choose the from and to units, and the converted value is shown immediately. The pound is defined as exactly 0.45359237 kg, and 16 ounces make one pound.
How to use the Weight Converter
- Enter your values, choosing the units you are working in.
- Read the result and the supporting numbers shown beneath it.
- Check the result against a second method or a reference table before you rely on it.
About the Weight Converter
Convert between kilograms, grams, pounds, ounces and stone.
Quick, reliable engineering arithmetic saves time on site and in the workshop. These tools show their working so you can check the result.
Getting started with the Weight Converter
Using the weight converter takes a minute or two. Your entries are saved in this browser, so you can come back later and carry on.
Tips for better results
When converting body weight or recipe quantities, keep a few decimals through the calculation and round only at the end.
Keep units consistent from start to finish.
These tools are for estimates. Safety critical designs need a qualified engineer.
Privacy and where your data goes
Everything you type into the weight converter stays on your own device. Zapxa does not receive your numbers or documents. If you clear your browser data, your saved entries will be removed, so download a PDF of anything you want to keep.
Frequently asked questions
How many kilograms is a pound?
Exactly 0.45359237 kilograms.
How many pounds are in a stone?
14 pounds make one stone, which is about 6.35 kg.
Is the weight converter free?
Yes. It is free to use with no signup, no watermark and no usage limits.
Is my data private?
Yes. Your inputs are processed in your browser and saved only in its local storage. They are not uploaded to our servers.
Does it work on mobile?
Yes. Zapxa works on phones, tablets and desktops. Use the print button or download a PDF to keep a copy.
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