⚖️ Weight and Mass Converter 2026
Convert between 100+ weight and mass units from around the world
1 kg = 2.205 lb
Formula: value × 2.20462
📊 All Conversions
Common Weight Conversions
| From | To | Multiply by |
|---|---|---|
| 1 kilogram (kg) | pounds (lb) | 2.20462 |
| 1 pound (lb) | kilograms (kg) | 0.453592 |
| 1 ounce (oz) | grams (g) | 28.3495 |
| 1 stone (st) | pounds (lb) | 14 |
| 1 metric ton | kilograms (kg) | 1,000 |
| 1 short ton (US) | pounds (lb) | 2,000 |
| 1 long ton (UK) | pounds (lb) | 2,240 |
Understanding Weight Units
⚖️ Metric System
Based on kilogram. 1 kg = 1000 g. 1 metric ton = 1000 kg. Used globally for science and most countries' daily life.
🇺🇸 Imperial/US
Pound and ounce. 1 lb = 16 oz. 1 stone = 14 lb. 1 ton = 2000 lb (US) or 2240 lb (UK). Used in US, UK (for body weight).
💎 Troy System
For precious metals. 1 troy oz = 31.1 g (heavier than regular oz). 12 troy oz = 1 troy lb. Used for gold, silver, gems.
🌏 Asian Units
Regional systems: Catty, tael, momme (Japan), chin (China/Japan). Many now standardized to metric equivalents.
Frequently Asked Questions
How many pounds in a kilogram?
2.20462 pounds = 1 kilogram. Quick estimate: multiply kg by 2.2.
70 kg ≈ 154 lbs.
How many kilograms in a pound?
0.453592 kg = 1 pound. Quick estimate: divide lb by 2.2. 150 lbs ≈
68 kg.
How many ounces in a pound?
16 ounces = 1 pound. This is avoirdupois (standard). Troy system
uses 12 oz/lb for precious metals.
How many grams in an ounce?
28.3495 grams = 1 avoirdupois ounce. Troy oz = 31.1035 g (for
gold/silver).
How many pounds in a stone?
14 pounds = 1 stone. UK unit for body weight. 10 stone = 140 lbs =
63.5 kg.
How many grams in a kilogram?
1,000 grams = 1 kilogram. "Kilo" means thousand. Metric system is
base-10.
What is the difference between mass and weight?
Mass = amount of matter (kg). Weight = force due
to gravity (N). Weight varies with location; mass doesn't. Everyday use treats them as same.
What is a metric ton?
1,000 kg = 1 metric ton (tonne). ≈ 2,205 lbs. Different from US
ton (2,000 lbs) and UK ton (2,240 lbs).
What is the difference between short and long ton?
Short ton (US) = 2,000 lbs = 907 kg. Long ton
(UK) = 2,240 lbs = 1,016 kg. Metric ton = 1,000 kg.
What is a troy ounce?
31.1035 grams. Heavier than regular ounce (28.35 g). Used for
precious metals. Gold price is per troy oz.
How do I convert stone to kg?
Multiply by 6.35029. 1 stone = 6.35 kg = 14 lbs. 12 stone = 76.2
kg ≈ 168 lbs.
What is a carat?
0.2 grams = 1 metric carat. Used for gemstones. 5 carats = 1 gram.
Don't confuse with karat (gold purity).
How many milligrams in a gram?
1,000 mg = 1 gram. Common for medication doses. 1 µg (microgram) =
0.001 mg.
What is an atomic mass unit (amu)?
~1.66 × 10⁻²⁷ kg. Mass of 1/12 of carbon-12 atom. Also called
Dalton (Da). Used in chemistry/physics.
What is a hundredweight?
Short (US): 100 lbs. Long (UK): 112 lbs. Used in
trade. "Cwt" abbreviation.
What Asian weight units are still used?
China: Jin (500g), Liang (50g). Japan: Momme
(3.75g), Kan. Thailand: Baht (15g). Many standardized to metric.
How accurate is this weight converter?
Uses precise conversion factors. Based on international standards.
Results accurate for all practical applications.