Weight Converter
Convert between milligrams, grams, kilograms, tons, ounces, pounds, and stone.
Weight (more precisely, mass) conversion comes up constantly in cooking, shipping, fitness tracking, and international commerce, where metric units (grams, kilograms) and imperial units (ounces, pounds, stone) coexist and rarely align to clean round numbers. A recipe in grams, a shipping weight limit in pounds, or body weight tracked in stone all need accurate conversion to be useful across borders.
This converter uses exact standards-based conversion factors — one pound is defined as exactly 0.45359237 kilograms internationally — so results stay precise across the full range from milligrams to metric tons. Enter your value, pick your source and target units, and get an instant, accurate result.
How to use Weight Converter
- 1
Enter your value
Type the weight you want to convert.
- 2
Select the source unit
Choose the unit your value is currently in.
- 3
Select the target unit
Choose the unit you want to convert to.
- 4
Read the result
The converted value updates instantly.
Features
- Covers metric and imperial/US weight units in one tool
- Uses the exact internationally defined pound-to-kilogram factor
- Instant live conversion
- Useful for cooking, shipping, and fitness tracking
Frequently asked questions
Common mistakes to avoid
- Confusing a metric ton with a US short ton or UK long ton — they differ by several percent.
- Rounding pound-to-kilogram conversions too aggressively for precise applications like shipping cost calculations.
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