Kilograms vs Pounds: Everything You Need to Know
If you've ever tried to follow a foreign recipe, check your weight on a scale in another country, or buy produce abroad, you've run into the kg vs pounds problem. Here's the complete guide.
The Conversion Formula
1 kilogram = 2.20462 pounds 1 pound = 0.453592 kilograms
Quick mental shortcut: Multiply kg by 2.2 to get a close approximation in pounds. (70 kg × 2.2 = 154 lbs — the actual value is 154.3 lbs.)
For the reverse: divide pounds by 2.2. (150 lbs ÷ 2.2 = 68.2 kg — actual: 68.0 kg.)
Use our kg to pounds converter for exact results.
Quick Reference Chart
| Kilograms (kg) | Pounds (lbs) | Common Reference |
|---|---|---|
| 1 kg | 2.2 lbs | Litre of water |
| 5 kg | 11 lbs | Bag of flour |
| 10 kg | 22 lbs | Medium suitcase limit |
| 50 kg | 110 lbs | Light adult |
| 70 kg | 154 lbs | Average adult worldwide |
| 100 kg | 220 lbs | Heavy adult / 100 kg landmark |
| 150 kg | 330 lbs | Maximum most scales measure |
Who Uses Kilograms vs Pounds?
Kilograms (kg) are the standard unit of mass in the metric system, used by nearly every country worldwide for body weight, food, and commercial goods.
Pounds (lbs) are used primarily in the United States for body weight and everyday items. The UK uses a mixed system — kilograms in supermarkets and official contexts, but many British people still think of body weight in stones and pounds (1 stone = 14 lbs).
Other Weight Units
- Gram (g): 1,000g = 1 kg. Used for small quantities (ingredients, medicines).
- Milligram (mg): 1,000mg = 1g. Used in pharmaceuticals.
- Stone (st): 1 stone = 14 lbs = 6.35 kg. Common in UK and Ireland for body weight.
- Metric ton / tonne: 1,000 kg. Used for large quantities (shipping, vehicles).
- Short ton (US ton): 2,000 lbs = 907 kg. Used in the US for heavy goods.
- Troy ounce: Used only for precious metals (gold, silver) — 31.1g, slightly heavier than a regular ounce (28.35g).
Kilograms vs Pounds: Which is More Accurate?
Both systems can express any degree of precision. Kilograms are generally considered more practical for scientific and medical use because the metric system's base-10 structure makes calculations easier.
Body Weight: Kg vs Lbs vs Stone
If you're calculating your BMI, the formula changes depending on your units:
- Metric: BMI = weight (kg) ÷ height² (m)
- Imperial: BMI = 703 × weight (lbs) ÷ height² (inches)
Our BMI calculator handles both unit systems automatically.
Convert Weight Instantly
Use our weight converter → to convert between kilograms, pounds, stones, ounces, grams, metric tons, and more.
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