Weight Conversion Calculator
Convert weight between pounds, kilograms, ounces, grams, tons, stones, and other weight units instantly.
Calcady™ · Calculation Report Weight Converter calcady.com Mass Converter68.0388 Converted Value68.0388 Kilograms |
Quick Answer: Common Weight Conversions
1 pound = 0.4536 kg. 1 kg = 2.2046 lbs. 1 ounce = 28.3495 grams. 1 stone = 14 lbs = 6.35 kg. 1 US ton = 2,000 lbs (short ton). 1 metric tonne = 2,204.6 lbs = 1,000 kg.
Weight Conversion Reference
| From | To | Multiply By |
|---|---|---|
| Pounds (lbs) | Kilograms | 0.45359 |
| Kilograms | Pounds | 2.20462 |
| Ounces (oz) | Grams | 28.3495 |
| Stone | Pounds | 14 |
| Short Ton (US) | Metric Tonne | 0.90718 |
| Troy Ounce | Grams | 31.1035 |
Troy ounces (31.1g) are used for precious metals. Avoirdupois ounces (28.35g) are used for everything else. Gold priced at "$2,000 per ounce" means troy ounces.
Frequently Asked Questions
What is the difference between mass and weight?
Mass is the amount of matter (measured in kilograms). Weight is the gravitational force on that mass (measured in newtons). A 70 kg person has a mass of 70 kg everywhere, but weighs 686 N on Earth and 114 N on the Moon. In everyday use, "weight" and "mass" are used interchangeably because we're always on Earth where gravity is constant.
Why are there three different types of tons?
Short ton (US) = 2,000 lbs. Long ton (Imperial) = 2,240 lbs. Metric tonne = 1,000 kg = 2,204.6 lbs. The short ton is used in US commerce and shipping. The long ton is used in British shipping and naval displacement. The metric tonne is the international standard. When buying bulk materials (gravel, steel, grain), always confirm which "ton" is being quoted — the difference between a short ton and metric tonne is 10%.
What is a troy ounce?
A troy ounce (31.1035g) is heavier than a regular (avoirdupois) ounce (28.3495g). Troy ounces are used exclusively for precious metals — gold, silver, platinum. When gold is quoted at "$2,000 per ounce," it means troy ounces. Confusingly, a troy pound (12 troy oz = 373.2g) is lighter than a regular pound (16 oz = 453.6g). The troy system dates back to the medieval French city of Troyes.