180 lbs to kg

How to convert 180 lbs to kg

A pound is defined as exactly 0.45359237 kilogram, so multiply:

180 lb × 0.45359237 = 81.65 kg

Dividing by 2.20462 gives the same answer. The converter above starts at 180 lb and has a second field for ounces; type a different number and the kilograms follow, or use the full lbs to kg converter. To go the other way, see kg to lbs.

180 lbs in kilograms and grams, and in stone

The 0.65 after the whole kilograms is a fraction of a kilogram: 0.6466 × 1,000 = 646.6 grams. So 180 pounds is:

• 81 kg 647 g — the way a metric scale or a parcel form reads;
• 81,647 g — in grams;
• 12 st 12 lb — the British way of stating weight (180 ÷ 14).

The result block shows all of these for whatever you enter. 180 lb is 81.65 kg, or 12 st 12 lb on a British scale. Gym equipment rated in kilograms, such as an 80 kg weight stack, sits just below it.

Nearby values

From 80 to 280 lb:

Rounded for display, 180 lb is 81.6 kg on a scale with one decimal and 82 kg on one that shows whole kilograms. Going the other way, 82 kg is 180.8 lb, so a reading of 82 kg on a metric scale is 0.8 lb more than 180 lb.

180 pounds and some ounces

Scales in the U.S. often read pounds and ounces. Each ounce is 28.35 grams, so the ounces matter at this weight only in the first decimal:

180.25 lb is 180 lb 4 oz, 180.5 lb is 180 lb 8 oz and 180.75 lb is 180 lb 12 oz. Type the ounces into the second field to convert an exact reading.

A quick rule for your head

Halve the pounds, then take away 10% of that: 180 ÷ 2 = 90, and 90 − 9 = 81 kg. The rule is about 0.8% low — here 0.65 kg. Halving alone (90 kg) is 8.35 kg too high. On a metric scale with one decimal, 180 lb shows as 81.6 kg. For smaller weights, use ounces to grams.