About this Weight Converter
Mass conversion is essential for everything from baking recipes to international shipping and fitness tracking. Convert kilograms to pounds, ounces to grams, or stones to pounds instantly with this tool.
Who this calculator is for
- Shippers, warehouse teams, and online sellers working across metric and imperial weight labels.
- Home cooks, bakers, and meal preppers converting recipe ingredient amounts.
- Fitness users and travelers tracking body weight or baggage limits in different unit systems.
When to use it
- Use it when a recipe lists grams but your scale or packaging uses ounces or pounds.
- Use it before shipping, checking luggage, or comparing product weights from international suppliers.
- Use it to translate body-weight measurements between kilograms, pounds, and stone.
How to use this calculator
- Input the Weight value.
- Select the starting unit (e.g., Kilograms).
- Select the desired output unit (e.g., Pounds).
Key assumptions
- The calculator applies standard mass-conversion constants and does not adjust for gravity or local weighing conditions.
- Metric ton refers to 1,000 kilograms, and stone is treated as the UK standard 14 pounds.
- This tool converts mass-style units only, so liquid measures and fluid ounces belong in the volume converter instead.
Accuracy and testing
Review formula sources, default test cases, assumptions, unit handling, rounding rules, and changelog for this calculator.
How this calculator works
Conversions use standard international factors based on the gram:
* 1 Pound (lb) = 453.59237 grams
* 1 Kilogram (kg) = 1000 grams
* 1 Ounce (oz) = 28.3495 grams
Inputs explained
Value
The numeric weight you want to convert.
Units
Supports Metric (kg, g, mg, metric ton) and Imperial/US (lb, oz, stone).
Understanding your results
The result is accurate to 4 decimal places. Note that 'Stone' is primarily used in the UK and Ireland for body weight.
Example scenarios
Body Weight
Convert 70 kg to lbs. Result: 154.32 lbs.
Cooking
Convert 8 ounces to grams. Result: 226.8 grams.
Shipping
Convert 2000 lbs to Metric Tons. Result: 0.907 t.
Key Features
- Supports Stone (st)
- Metric & Imperial
- Instant Calculation
Tips & Best Practices
- 1 kg is roughly 2.2 pounds.
- There are 16 ounces in a pound.
- A Metric Ton (1000 kg) is slightly smaller than a UK Long Ton but larger than a US Short Ton.
Glossary of Terms
- Mass vs Weight
- Scientifically, mass is the amount of matter, while weight is the force of gravity on that matter. In daily life, they are used interchangeably.
- Stone
- An Imperial unit used in the UK equal to 14 pounds.