How to Convert Stones to Pounds
A complete guide to converting stones to pounds, including the exact formula, worked examples, a reference table, and information about where and why stones are used.
Last updated: 2025-03-13
The Stones to Pounds Formula
One stone equals exactly 14 pounds. This is one of the simplest unit conversions because the factor is a whole number with no decimals or rounding. The formula is:
pounds = stones × 14
In the UK and Ireland, body weight is commonly expressed in stones and pounds together — for example, “11 stone 4” means 11 stones and 4 extra pounds. To convert this combined format to total pounds, multiply the stone value by 14 and add the remaining pounds: (11 × 14) + 4 = 158 lbs.
Step-by-Step Examples
Example 1: Converting 9 Stone to Pounds
- Step 1: Take the value in stones: 9 st.
- Step 2: Multiply by 14: 9 × 14 = 126.
- Result: 9 stone equals 126 pounds.
Example 2: Converting 12 Stone 7 to Pounds
- Step 1: Multiply the stones by 14: 12 × 14 = 168.
- Step 2: Add the extra pounds: 168 + 7 = 175.
- Result: 12 stone 7 equals 175 pounds.
Example 3: Converting 15 Stone to Pounds
- Step 1: Take the value: 15 st.
- Step 2: Multiply: 15 × 14 = 210.
- Result: 15 stone equals 210 pounds.
Use our pounds to stones converter for instant results in either direction.
Quick Reference Table
| Stones | Pounds | Kilograms |
|---|---|---|
| 7 st | 98 lbs | 44.45 kg |
| 8 st | 112 lbs | 50.80 kg |
| 9 st | 126 lbs | 57.15 kg |
| 10 st | 140 lbs | 63.50 kg |
| 11 st | 154 lbs | 69.85 kg |
| 12 st | 168 lbs | 76.20 kg |
| 13 st | 182 lbs | 82.55 kg |
| 14 st | 196 lbs | 88.90 kg |
| 15 st | 210 lbs | 95.25 kg |
| 20 st | 280 lbs | 127.01 kg |
The Reverse Formula: Pounds to Stones
To convert pounds to stones, divide by 14:
stones = pounds ÷ 14
For example, 180 lbs ÷ 14 = 12.857 stone, or 12 stone 12 lbs (since 0.857 × 14 = 12). Our weight converter handles this automatically.
History of the Stone
The stone has been used as a unit of weight in the British Isles since the Middle Ages. Originally, the stone varied by commodity and region — a stone of wool weighed differently from a stone of butcher's meat. In 1389, England defined the stone of wool as 14 pounds, and this value eventually became the standard for all purposes. The Weights and Measures Act of 1835 officially set 1 stone at 14 pounds, and that definition remains today.
Real-World Applications
Body Weight in the UK
British and Irish people almost universally express their body weight in stones and pounds. If someone says they weigh “11 stone,” Americans need to multiply by 14 to understand that as 154 lbs. NHS guidelines, fitness apps used in the UK, and bathroom scales sold there commonly show stones.
Sports
Boxing and horse racing in the UK use stones for weight classes. A middleweight boxer fights at up to 11 stone 6 (160 lbs). In horse racing, jockeys and their gear are weighed in stones and pounds, with handicap weights assigned in the same unit.
Health and Medicine
While the NHS officially records patient weights in kilograms, many patients report their weight in stones. Healthcare professionals in the UK need to convert between stones, pounds, and kilograms regularly. A patient saying “I weigh 13 stone 2” means 184 lbs or 83.46 kg.
Frequently Asked Questions
How many pounds are in a stone?
There are exactly 14 pounds in one stone. This is an exact, whole-number definition with no rounding.
How do I convert 10 stone to pounds?
Multiply 10 by 14 to get 140 pounds. If the weight is 10 stone 7 (10 st 7 lb), that equals (10 × 14) + 7 = 147 pounds.
Which countries use stones for weight?
The stone is primarily used in the United Kingdom and Ireland for body weight. Some Commonwealth countries like Australia and Canada understand the unit culturally, but they officially use kilograms.
Quick Reference Section
- Stones to Pounds: lbs = stones × 14
- Pounds to Stones: stones = lbs ÷ 14
- Stones to KG: kg = stones × 6.35029
- Key anchor: 1 stone = 14 lbs = 6.35 kg (exact)
For precise conversions, use our free pounds to stones converter.