Weight Converter
A fast, private weight converter. Pick your units, type a value, and the conversion appears instantly — in either direction. Everything runs on your device, so nothing you enter is ever uploaded.
- 🔒 100% private — no uploads
- 🆓 Free, no watermark
- 📱 Works on any device
How to convert
- 1
Choose your units
The tool opens on the most common pairing. Change either unit from its dropdown, or hit the swap button to flip the direction.
- 2
Type a value
Enter a number in either box. The other side updates instantly as you type — convert either way without pressing a button.
- 3
Copy or compare
Copy the result to your clipboard, or scan the common-values table below for quick at-a-glance conversions.
Why use Weight Converter?
100% private
Every conversion is computed locally in your browser. Nothing you enter ever leaves your device.
Instant & two-way
Results update live as you type, in either direction — no “convert” button and no page reloads.
Accurate
Conversions use exact, standards-based factors, so you get the same answer a trusted reference would.
Works on any device
No install and no account — it runs in any modern browser on desktop, tablet or phone.
Grams, kilograms, ounces and pounds
Strictly this converts mass, but for body weight, luggage, groceries and shipping it’s exactly what you want. The factors are exact: a pound is defined as 0.45359237 kg. Milligrams to metric tonnes and ounces to US tons are all covered in one dropdown.
Everyday anchors
A bag of sugar is 1 kg (2.2 lb), an airline checked-bag limit of 50 lb is 22.7 kg, a newborn around 3.5 kg (7.7 lb), and a stick of butter 113 g (4 oz). Keep one or two anchors in mind and you can sanity-check any conversion at a glance.
Frequently asked questions
What units does the weight converter support?
It covers the common weight units (mg, g, kg, t, oz, lb, st and others). Choose any two from the dropdowns and convert between them instantly.
Does anything get uploaded to a server?
No. The conversion runs entirely in your browser with JavaScript — nothing you type is uploaded, stored or logged, and it keeps working offline once the page has loaded.
Is it free?
Yes — completely free, with no account, no watermark and no limits on how much you convert.