Divide pounds by 14 to get stone. UK scales, bathroom scales and medical records often still use stone.
How to use the Pounds to Stone Converter
- Type the number of pounds into the Pounds field. Decimals such as 77 are fine.
- Read the answer in Stone – it updates as you type, with no button to press.
- To convert the other way, type into Stone and the pounds are recalculated.
- Press Copy results to copy both values with the page title, or Copy link to share this exact conversion.
This page converts only lb ⇄ st. Need a different unit? Use the general weight converter, where you can choose any “from” and “to” unit.
How it works
Both units measure weight, so they are always in the same ratio: one pound equals 0.071428571 stone. The calculator multiplies the number of pounds you type by 0.071428571 to give stone, and when you type into the stone field it divides by the same factor to give pounds. Because the ratio never changes, doubling the pounds always doubles the stone. Results are calculated at full precision and rounded only for display (up to eight decimal places, with very large or small values shown in scientific notation).
How to convert pounds to stone
- Write down the value in pounds, for example 154 lb.
- Multiply by the conversion factor 0.071428571 (because 1 pound = 0.071428571 st).
- 154 × 0.071428571 = 11 st.
- To go back from stone to pounds, divide by 0.071428571 – or multiply by 14.
lb to st conversion table
| Pounds | Stone | Stone | Pounds |
|---|---|---|---|
| 100 lb | 7.1428571 st | 1 st | 14 lb |
| 112 lb | 8 st | 2 st | 28 lb |
| 126 lb | 9 st | 5 st | 70 lb |
| 140 lb | 10 st | 10 st | 140 lb |
| 154 lb | 11 st | 20 st | 280 lb |
| 168 lb | 12 st | 50 st | 700 lb |
| 182 lb | 13 st | 100 st | 1,400 lb |
| 196 lb | 14 st | 1,000 st | 14,000 lb |
| 210 lb | 15 st | ||
| 224 lb | 16 st |
What is a pound?
The avoirdupois pound is defined as exactly 0.45359237 kg and is divided into 16 ounces. It is the everyday weight unit in the U.S. and is still widely used in the UK for body weight and food.
What is a stone?
The stone is 14 pounds, about 6.35 kg. People in the UK and Ireland still commonly give their body weight in stones and pounds, such as 11 st 4 lb.
Quick mental conversion
For a fast estimate, multiply pounds by about 0.071 to get stone; the error is about 0.6%. Use the calculator above when you need the exact figure.
Common mistakes to avoid
Confusing fluid ounces (volume) with ounces (weight), using troy ounces for food or regular ounces for gold, and mixing u.s. short tons, uk long tons and metric tonnes.
Formula
1 lb = 0.071428571 st1 st = 14 lbst = lb × 0.071428571Worked example
Inputs — Pounds: 154 lb.
Results — Stone = 11 st.
Frequently asked questions
How many stone is 154 lb?
11 st.
How many pounds in a stone?
14.
How do I convert pounds to stone?
Multiply the number of pounds by 0.071428571. For example, 154 lb × 0.071428571 = 11 st.
How do I convert stone back to pounds?
Divide by 0.071428571 (or multiply by 14), or simply type the value into the stone field above.
What is 100 lb in stone?
100 lb = 7.1428571 st.
Is this conversion exact?
Yes. The factor comes from the official definitions of both units (NIST and the SI), so the only difference you may see is rounding in the last displayed digit.
Can I convert to other units on this page?
This page converts only between pounds and stone. To pick any weight unit, use the general weight converter linked under Related calculators.
What formula does the Pounds to Stone Converter use?
1 lb = 0.071428571 st.