⚖️ Weight
Convert weight and mass units free: kilogram, gram, pound, ounce, tonne, milligram. Instant accurate results, no upload.
⚖️ Weight
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About the Weight Tool
Weight conversion comes up constantly in cooking, shipping, fitness, and health. Recipes cross borders, courier rates are quoted in different units depending on the carrier, and body weight is discussed in kilograms in most of the world but stones and pounds in Britain.
This converter covers kilograms, grams, milligrams, tonnes, pounds, and ounces using exact defined factors — one pound is precisely 0.45359237 kilograms. Results are calculated instantly in your browser with no rounding beyond display precision.
How to Use Weight
- Enter the weight value.
- Choose the source unit.
- Choose the target unit.
- Read the converted result immediately.
When to Use This Tool
- Converting recipe ingredient quantities between metric and imperial
- Checking parcel weight against a courier’s limits
- Translating body weight between kilograms and pounds
- Converting nutritional quantities from grams to ounces
- Working with material weights in shipping or manufacturing
Things Worth Knowing
- One pound equals exactly 0.45359237 kilograms by international definition.
- A metric tonne is 1000 kilograms, distinct from the US short ton of 2000 pounds.
- Strictly, these are units of mass rather than weight, though the terms are used interchangeably in everyday contexts.
Quick Facts
| Tool name | Weight |
| Category | Unit Converters |
| Price | Free — no account, no trial, no watermark |
| Where it runs | Entirely in your browser (client-side) |
| Files uploaded | None — your data never leaves your device |
| File size limit | None imposed; limited only by device memory |
| Works offline | Yes, once the page has loaded |
| Platforms | Windows, macOS, Linux, Android, iOS |
Frequently Asked Questions
How many pounds are in a kilogram?
Approximately 2.20462. For rough mental arithmetic, doubling and adding ten percent gets you close enough for most everyday purposes.
What is the difference between a tonne and a ton?
A metric tonne is 1000 kilograms, about 2205 pounds. A US short ton is 2000 pounds, about 907 kilograms. A UK long ton is 2240 pounds. Always check which is meant in commercial contexts.
How do I convert to stones?
One stone is 14 pounds, or about 6.35 kilograms. It remains in common use in Britain and Ireland for body weight but almost nowhere else.
Is mass the same as weight?
Technically no — mass is the amount of matter, weight is the force gravity exerts on it. On Earth they are proportional, so everyday usage treats them as equivalent.