20 pounds to kilograms
9.07 kg
20 lb = 9.07 kg, or 1 st 6 lb.
kilograms
9.07kg
20 lb = 9.07 kg
The short answer
How many kilograms is 20 pounds?
20 lb = 9.07 kg, which reads as 1 st 6 lb. 1 pound = 0.453592 kilograms, so the working is 20 × 0.453592 = 9.07.
The working
The factor below is an exact definition rather than a measurement, so nothing is approximated in the arithmetic. The only rounding on this page happens where a number is displayed.
1 pound = 0.453592 kilograms 20 × 0.453592 = 9.07
20 pounds as 1 st 6 lb
A decimal is the right form for a spreadsheet and the wrong one for almost everything else. Split into whole units, 20 lb is 1 st 6 lb — the reading you would actually give someone, and the one a tape measure, a scale, or a timetable is marked in.
How much precision do you need?
Each row is the same answer cut at a different number of decimals, with what that choice costs you. Pick the shortest row whose error is smaller than whatever you are measuring with.
| Rounded to | Answer (kg) | Off by |
|---|---|---|
| Whole number | 9 | −0.07185 |
| 1 decimal | 9.1 | +0.02815 |
| 2 decimals | 9.07 | −0.00185 |
Round trip: take 9.07 kg back the other way and you land on 19.9959 lb — a drift of 0.0041 lb. That gap is the rounding, not the conversion.
What 20 lb looks like
20 lb
The barbecue cylinder Americans swap at the hardware store is a 20 lb tank, holding roughly 4.7 gallons of propane.
Frequently asked questions
What is 20 pounds in kilograms?
20 pounds is 9.07 kilograms. 1 pound = 0.453592 kilograms, so the working is 20 × 0.453592 = 9.07.
What is 20 pounds written out in whole units?
1 st 6 lb. A decimal answer such as 9.07 kg is the right shape for a form field or a spreadsheet, but the compound form is what a tape measure, a scale, or a schedule actually reads.
How accurate is 9.07 kg?
Rounding to 9.07 kg and converting straight back gives 19.9959 lb, a drift of 0.0041 lb from the 20 you started with. The factor itself is exact; every bit of that difference comes from the rounding, not the conversion.
Nearby values
Any value at all
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