Weight Converter
Easily convert between various units of weight and mass.
Converted Values
Mass vs Weight
Technically, mass is a measure of the amount of matter in an object, while weight is the force of gravity on that object. On Earth, they are often used interchangeably.
Unit Facts
- 1 kg = 2.20462 lbs
- 1 lb = 16 ounces
- 1 stone = 14 lbs
- 1 ton = 1000 kg
Mass vs. Weight: A Scientific Distinction
In everyday conversation, we use "weight" to describe how heavy something is. However, in physics, mass is the actual amount of matter in an object, while weight is the gravitational force acting on that mass.
Our converter handles "mass" units as they are commonly used in trade and science. Whether you're measuring ingredients for a recipe or calculating shipping loads for a cargo plane, precision is key to safety and success.
Global Measurement Standards
- Metric System: Used by 95% of the world, based on the Kilogram (kg).
- Avoirdupois: The system used for everyday weight in the US (lbs, oz).
- Troy Weight: Used exclusively for precious metals like gold and silver.
Frequently Asked Questions
How many grams are in a pound?
Exactly 453.59237 grams. This was internationally agreed upon in 1959 to standardize trade between metric and imperial nations.
What is a "Stone" (st)?
The stone is a unit of weight in the imperial system used primarily in the UK and Ireland for measuring human body weight. One stone equals 14 pounds.
What is the difference between a Long Ton and a Short Ton?
A Short Ton (US) is 2,000 lbs, while a Long Ton (UK) is 2,240 lbs. Our "Metric Ton" (t) is 1,000 kg (approx. 2,204.6 lbs).
Is the Kilogram changing?
Since 2019, the kg is defined by the Planck constant rather than a physical metal cylinder in France, ensuring it never loses mass over time.
Quick Conversion Reference Table
| From Unit | To Unit | Exact Multiplier |
|---|---|---|
| 1 Pound (lb) | Ounces (oz) | 16 |
| 1 Kilogram (kg) | Grams (g) | 1,000 |
| 1 Stone (st) | Pounds (lb) | 14 |
| 1 Kilogram (kg) | Pounds (lb) | 2.20462262 |