Kilograms to Pounds and Stone: Weight Guide
Body weight, luggage allowances, food quantities and postal scales all use different units depending on where you are in the world. Kilograms are the standard in most countries. Pounds are used in the United States. Stone is still widely used in the United Kingdom for describing body weight.
This guide gives you the exact formulas, quick shortcuts and a full reference table for converting between all three units. Use the free Weight and Mass Converter for instant results.
The Three Most Common Weight Units
| Unit | Where It Is Used | Key Equivalent |
|---|---|---|
| Kilogram (kg) | The SI base unit of mass. Used in most countries for body weight, food and commerce. | 1 kg = 1,000 grams |
| Pound (lb) | Part of the imperial system. Used in the US and informally in Canada and the UK. | 1 lb = 16 ounces = 0.4536 kg |
| Stone (st) | Used almost exclusively in the UK and Ireland for body weight. | 1 stone = 14 pounds = 6.35 kg |
Kilogram to Pound Conversion
Pounds = Kilograms multiplied by 2.20462
Kilograms = Pounds divided by 2.20462
Example 1: Convert 70 kg to Pounds
70 multiplied by 2.20462 = 154.32 pounds
Quick mental shortcut: multiply kg by 2.2 for a close estimate.
Example 2: Convert 150 Pounds to Kilograms
150 divided by 2.20462 = 68.04 kg
Kilogram to Stone Conversion
Stone = Kilograms divided by 6.35029
Example: Convert 75 kg to Stone and Pounds
75 divided by 6.35029 = 11.81 stone
11 whole stones, plus 0.81 of a stone
0.81 multiplied by 14 = 11.3 pounds
Answer: 11 stone and 11.3 pounds
Pounds to Stone Conversion
Stone = Pounds divided by 14
Example: Convert 168 Pounds to Stone
168 divided by 14 = 12 stone exactly
Weight Conversion Reference Table
| Kilograms | Pounds | Stone and Pounds |
|---|---|---|
| 50 kg | 110.2 lbs | 7 st 12 lbs |
| 55 kg | 121.3 lbs | 8 st 9 lbs |
| 60 kg | 132.3 lbs | 9 st 6 lbs |
| 65 kg | 143.3 lbs | 10 st 3 lbs |
| 70 kg | 154.3 lbs | 11 st 0 lbs |
| 75 kg | 165.3 lbs | 11 st 11 lbs |
| 80 kg | 176.4 lbs | 12 st 8 lbs |
| 85 kg | 187.4 lbs | 13 st 5 lbs |
| 90 kg | 198.4 lbs | 14 st 2 lbs |
| 100 kg | 220.5 lbs | 15 st 10 lbs |
| 110 kg | 242.5 lbs | 17 st 4 lbs |
| 120 kg | 264.6 lbs | 18 st 12 lbs |
Ounces and Grams for Food and Cooking
| 1 ounce (oz) | 28.35 grams |
| 100 grams | 3.53 ounces |
| 250 grams (common food portion) | 8.82 ounces or about half a pound |
| 500 grams (half a kilogram) | 17.64 ounces or 1.1 pounds |
| 1 kilogram | 35.27 ounces or 2.205 pounds |
| 1 pound (16 ounces) | 453.59 grams or 0.454 kg |
Luggage and Airline Weight Allowances
| 7 kg carry-on limit | 15.4 pounds |
| 10 kg carry-on limit | 22 pounds |
| 20 kg checked bag limit | 44 pounds |
| 23 kg checked bag limit (common in US) | 50.7 pounds |
| 32 kg maximum checked bag (most airlines) | 70.5 pounds |
BMI and Health Calculations
Body weight in kilograms is used in health calculations like BMI, BMR and TDEE. If you know your weight in pounds or stone, convert it to kilograms first using the Weight Converter and then enter it into the health tools.
- BMI Calculator uses weight in kg and height in metres
- BMR Calculator needs weight in kg for the Mifflin-St Jeor formula
- Ideal Weight Calculator shows healthy weight range in both kg and lbs
Related Tools
- Weight and Mass Converter kg, lbs, stone, ounces, grams and more
- All Unit Converters browse all 74 converters on CalConvs
Frequently Asked Questions
How many pounds is 1 kg?
1 kilogram equals 2.20462 pounds. For a quick mental estimate, multiply kilograms by 2.2. So 5 kg is about 11 pounds and 10 kg is about 22 pounds. The exact factor is 2.20462, so multiplying by 2.2 gives a result that is very slightly under the true value.
What is 70 kg in stone and pounds?
70 kg equals 154.3 pounds, which is 11 stone and 0.3 pounds. To convert: 70 divided by 6.35 = 11.02 stone. The whole number is 11 stone. The remaining 0.02 multiplied by 14 = 0.3 pounds. So the answer is 11 stone and 0.3 pounds, or very close to 11 stone exactly.
Do Americans use kg or lbs for body weight?
Americans use pounds for body weight in everyday conversation. Kilograms are rarely used in the US for personal weight. Medical and scientific contexts in the US also often use kilograms since most drug dosing and clinical formulas (including BMI and BMR) are based on kilograms, even in the US.
Why does the UK use stone for body weight?
Stone is a historical unit from the British imperial system that has persisted in everyday UK usage despite the country officially adopting the metric system. British people describe their body weight in stone and pounds almost universally in casual conversation, even though shops and official contexts use kilograms. The persistence is cultural rather than official, UK law requires metric units for trade, but personal weight discussion remains imperial.