How it works
How to use the Weight Converter
Enter a value
Type or paste a value — results update instantly as you type.
Read the results
Every equivalent value is listed, with the most relevant one highlighted.
Copy what you need
Each result has its own copy button.
About the Weight Converter
Convert mass between grams, kilograms, metric tons, ounces, pounds, stones, US short tons, UK long tons and carats.
Built for developers
Why developers use it
Private by design
Runs 100% in your browser. Nothing you paste is uploaded, logged or stored on a server.
Instant results
Output updates as you type, with precise error locations when something is wrong.
Works offline
Once loaded, the tool keeps working without a connection. Install it as an app if you like.
Free, no sign-up
No accounts, no limits, no watermarks.
FAQ
Frequently asked questions
How accurate are the conversions?
Factors use exact international definitions where they exist (for example 1 inch = 25.4 mm exactly, 1 pound = 0.45359237 kg) and results are shown with up to 10 significant digits.
Is my data uploaded anywhere?
No. Everything runs locally in your browser — nothing you type, paste or open is sent to a server, logged or stored. The tool keeps working offline once the page has loaded.
Keep going
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