Convert stones and pounds to total pounds, or convert pounds back to normalized stone-and-pound notation with kilograms and ounces.
Calculator
1 stone = exactly 14 pounds. Additional pounds can be decimal values.
Conversion Results
Review total pounds, normalized stone notation, kilograms, ounces, and the exact calculation.
Pound Composition
Equivalent Weights
| Measurement | Value | Calculation note |
|---|
Convert stone and pounds in either direction
This calculator handles the two forms people usually need. Choose Stones and pounds to total pounds for a mixed British weight such as 11 st 10 lb. Choose Total pounds to stones and pounds to turn a US-style pound value into stone notation. Every result also includes kilograms and ounces so you can compare the same weight across common systems.
Stones to pounds formula
One British stone equals exactly 14 avoirdupois pounds. Multiply the number of stones by 14, then add any extra pounds.
total pounds = (stones x 14) + additional pounds
For example, 11 stone 10 pounds is (11 x 14) + 10 = 164 pounds. A stone-only value works the same way: 8 stone is 8 x 14 = 112 pounds.
Pounds to stones and pounds formula
Divide total pounds by 14. The whole-number quotient is the number of stones, and the remainder is the additional pounds.
whole stones = floor(total pounds / 14)
remaining pounds = total pounds - (whole stones x 14)
For 150 pounds, 14 fits into 150 ten whole times and leaves 10. Therefore, 150 lb = 10 st 10 lb. If the pound value includes decimals, the remainder keeps those decimals instead of rounding them away.
Stone to pounds chart
The table lists common whole-stone values in pounds and kilograms. Use the calculator for mixed values or greater precision.
| Stone | Pounds | Kilograms |
|---|---|---|
| 1 st | 14 lb | 6.35 kg |
| 2 st | 28 lb | 12.70 kg |
| 3 st | 42 lb | 19.05 kg |
| 4 st | 56 lb | 25.40 kg |
| 5 st | 70 lb | 31.75 kg |
| 6 st | 84 lb | 38.10 kg |
| 7 st | 98 lb | 44.45 kg |
| 8 st | 112 lb | 50.80 kg |
| 9 st | 126 lb | 57.15 kg |
| 10 st | 140 lb | 63.50 kg |
| 11 st | 154 lb | 69.85 kg |
| 12 st | 168 lb | 76.20 kg |
| 13 st | 182 lb | 82.55 kg |
| 14 st | 196 lb | 88.90 kg |
| 15 st | 210 lb | 95.25 kg |
| 16 st | 224 lb | 101.60 kg |
| 17 st | 238 lb | 107.95 kg |
| 18 st | 252 lb | 114.31 kg |
| 19 st | 266 lb | 120.66 kg |
| 20 st | 280 lb | 127.01 kg |
How kilograms are calculated
After finding total pounds, the calculator multiplies by 0.45359237 to obtain kilograms. Therefore one stone is 6.35029318 kilograms. The displayed value is rounded for readability, while calculations keep the full conversion factor.
kilograms = total pounds x 0.45359237
What does stone mean as a weight?
The stone is a British unit of mass still familiar in the United Kingdom and Ireland, especially for body weight. It is not the same as a literal rock and should not be confused with a US short ton or UK long ton. The National Bureau of Standards conversion table records one British stone as 14 avoirdupois pounds; that is the relationship used on this page.
How to read stone and pound notation
The abbreviation st means stone and lb means pounds. A value written as 12 st 4 lb means twelve complete stones plus four pounds, not 12.4 stones. In decimal stone, 12.4 st equals 12 stones plus 0.4 x 14, or 5.6 pounds. This calculator uses separate boxes for mixed notation so the distinction remains clear.
Common conversion examples
| Entered weight | Total pounds | Stone notation |
|---|---|---|
| 9 st 7 lb | 133 lb | 9 st 7 lb |
| 11 st | 154 lb | 11 st 0 lb |
| 11 st 10 lb | 164 lb | 11 st 10 lb |
| 196 lb | 196 lb | 14 st 0 lb |
| 225 lb | 225 lb | 16 st 1 lb |
Rounding and measurement accuracy
Use the number of decimal places justified by the scale or source measurement. Converting an approximate bathroom-scale reading to many decimal places does not make it more accurate. For everyday body weight, one decimal pound or one decimal kilogram is usually enough. Medical dosing, clinical decisions, shipping declarations, and regulated trade may require approved equipment and specific rounding rules.
Frequently asked questions
How many pounds are in one stone?
There are exactly 14 pounds in one British stone.
What is 11 stone 10 pounds in pounds?
It is 164 pounds because 11 x 14 = 154, then 154 + 10 = 164.
How do I convert pounds to stone?
Divide pounds by 14 for decimal stone. For mixed stone-and-pound notation, keep the whole-number quotient as stones and express the remainder as pounds.
Can the extra pounds be more than 13?
Yes. The total remains mathematically correct, and the result normalizes it. For example, 10 st 18 lb becomes 11 st 4 lb because 14 of the extra pounds make another stone.
Are stone and pounds used in the United States?
US weight is normally stated only in pounds. Stone notation remains more common in British and Irish contexts, so this converter is useful when reading or sharing values across those conventions.