Kg to Lbs: Formula, Conversion Chart, Ounces, and Stone
One kilogram is 2.20462 pounds — a single number that converts every weight you will ever need, from luggage allowances to gym plates to recipes. This guide gives the formula, the chart for common weights, the ounces and stone conversions that cause the confusion, and the rounding rules that keep you out of trouble at check-in.
Key takeaways
- Formula: pounds = kilograms × 2.20462. Reverse: kilograms = pounds ÷ 2.20462 (equivalently × 0.453592).
- One pound = 16 ounces; one stone (UK) = 14 pounds = 6.35029 kg. Stone conversions need two steps: total pounds first, then divide by 14.
- Round to the precision the situation needs: whole pounds for luggage, one decimal for gym and medical use, full precision only when a calculation continues.
The formula
The kilogram and the pound are linked by international agreement: one pound is defined as exactly 0.45359237 kilograms. Inverting gives the conversion used everywhere:
pounds = kilograms × 2.20462 · kilograms = pounds ÷ 2.20462
For mental arithmetic, × 2.2 is close enough for most purposes (within 0.2%): 70 kg ≈ 154 lbs by the quick rule, 154.32 lbs exactly. For luggage limits, medical doses by weight, and anything where a small error matters, use the full 2.20462. The kg to lbs converter on this page applies the exact factor in both directions.
Conversion chart
| Kilograms | Pounds (exact) | Pounds (rounded) |
|---|---|---|
| 1 kg | 2.20462 lbs | 2.2 lbs |
| 5 kg | 11.0231 lbs | 11.0 lbs |
| 10 kg | 22.0462 lbs | 22.0 lbs |
| 20 kg | 44.0925 lbs | 44.1 lbs |
| 25 kg | 55.1156 lbs | 55.1 lbs |
| 50 kg | 110.231 lbs | 110.2 lbs |
| 70 kg | 154.324 lbs | 154.3 lbs |
| 80 kg | 176.370 lbs | 176.4 lbs |
| 100 kg | 220.462 lbs | 220.5 lbs |
Read the chart in the direction you need: kilograms on the left, pounds on the right. For a weight between rows, the formula is faster than interpolating — multiply directly.
Pounds and ounces
One pound is 16 ounces, so a fractional pound converts by multiplying the fraction by 16. A weight of 154.32 lbs is 154 lbs plus 0.32 × 16 = 5.12 oz — about 154 lbs 5 oz. Going the other way, 5 oz is 5/16 = 0.3125 lbs, so 154 lbs 5 oz = 154.3125 lbs, or 70.0 kg (154.3125 ÷ 2.20462 ≈ 69.99). Kitchen and postal scales often display pounds and ounces, while gym and medical scales display decimal pounds or kilograms — knowing both forms stops the commonest conversion error, which is reading “5” in “154 lbs 5 oz” as 0.5 lbs instead of 0.3125 lbs.
Stone: the UK unit
In the UK, body weight is commonly given in stone and pounds, where 1 stone = 14 pounds = 6.35029 kg. Convert kilograms to stone by converting to pounds first, then dividing by 14: 70 kg = 154.32 lbs = 154.32 ÷ 14 = 11.02 stone, written 11 st 0 lb (the remainder: 0.02 × 14 ≈ 0.3 lbs, so 11 st 0 lbs, or more precisely 11 st 0.3 lbs). Convert stone to kilograms by the reverse: 11 st 7 lbs = (11 × 14 + 7) = 161 lbs = 161 ÷ 2.20462 ≈ 73.03 kg.
The trap with stone is forgetting the two-step structure: stone is not a decimal unit, so 11.5 stone means 11 stone plus 0.5 × 14 = 7 lbs (11 st 7 lbs), not 11 stone 5 lbs. Always convert the decimal part through pounds.
Rounding without regret
Match rounding to the decision. Luggage: whole pounds, and round up — a bag at 23.4 kg (51.6 lbs) against a 50 lb limit is overweight however you round, but a bag at 22.6 kg (49.8 lbs) passes; rounding down to 49 lbs would still pass, but rounding up to 50 lbs is the honest margin. Gym loads: one decimal place in pounds (154.3 lbs) or whole kilograms — plate math tolerates 0.5 lb. Medical and scientific use: keep full precision through the calculation and round only the final answer, because repeated rounding compounds error. And never round intermediate steps in a chain (kg → lbs → stone): convert with full precision, round once at the end.
Worked examples
Parcel: a parcel weighs 8.5 kg. In pounds: 8.5 × 2.20462 = 18.74 lbs — about 18 lbs 12 oz (0.74 × 16 = 11.8 oz).
Shopper: a shopper lifts a 12 kg bag. In pounds: 12 × 2.20462 = 26.46 lbs. In stone: 26.46 ÷ 14 = 1.89 st = 1 st 12.5 lbs (0.89 × 14 = 12.5).
Gym-goer: a lifter weighs 95 kg and wants their weight in pounds and stone. Pounds: 95 × 2.20462 = 209.44 lbs. Stone: 209.44 ÷ 14 = 14.96 st = 14 st 13.4 lbs (0.96 × 14 = 13.4). For a programme written in pounds, 209.4 lbs is the usable figure.
Frequently asked questions
How do you convert kg to lbs?
Multiply by 2.20462: pounds = kilograms × 2.20462. For example, 70 kg × 2.20462 = 154.32 lbs. For mental arithmetic, × 2.2 is within 0.2%.
How do you convert lbs to kg?
Divide by 2.20462 (or multiply by 0.453592): kilograms = pounds ÷ 2.20462. For example, 154 lbs ÷ 2.20462 ≈ 69.85 kg.
How many ounces are in a pound?
16. A fractional pound converts by multiplying by 16: 0.32 lbs = 5.12 oz. And 5 oz = 5/16 = 0.3125 lbs.
How do you convert kg to stone?
Convert to pounds first, then divide by 14: stone = (kg × 2.20462) ÷ 14. 70 kg = 154.32 lbs = 11.02 stone, written 11 st 0 lb.
What is 1 stone in kg?
6.35029 kg (14 lbs). A weight of 11 st 7 lbs is 161 lbs, which is about 73.03 kg.
Why is the exact factor 2.20462?
Because the pound is defined internationally as exactly 0.45359237 kg. Inverting gives 2.20462262 lbs per kg, rounded to 2.20462 for everyday use.
Convert any weight between kg, lbs, ounces, and stone
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