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Convert stones to pounds instantly with our free, accurate calculator. Essential for UK-to-US weight conversion, health tracking, and fitness goals.
Formula: Pounds = Stones x 14
Below is a quick-reference table showing common stone values converted to pounds, along with real-world context to help you visualise each weight.
| Stones (st) | Pounds (lb) | Context |
|---|---|---|
| 1 st | 14 lb | Small pet weight |
| 2 st | 28 lb | Toddler weight |
| 3 st | 42 lb | Large dog |
| 4 st | 56 lb | Child (age 6-7) |
| 5 st | 70 lb | Child (age 9-10) |
| 6 st | 84 lb | Young teen |
| 7 st | 98 lb | Teenager / small adult |
| 8 st | 112 lb | Small adult |
| 9 st | 126 lb | Average adult female (UK) |
| 10 st | 140 lb | Average adult |
| 11 st | 154 lb | Average adult male (UK) |
| 12 st | 168 lb | Athletic build |
| 13 st | 182 lb | Above-average build |
| 14 st | 196 lb | Large build |
| 15 st | 210 lb | Heavy build |
| 16 st | 224 lb | Very heavy build |
| 17 st | 238 lb | Professional rugby player |
| 18 st | 252 lb | Heavyweight boxer range |
| 20 st | 280 lb | Sumo wrestler range |
| 25 st | 350 lb | Large livestock (calf) |
The stone (abbreviated st) is a unit of weight in the British imperial system equal to exactly 14 avoirdupois pounds. It has been used in England since at least the 14th century, originally for weighing agricultural commodities like wool, where a "stone of wool" was standardised at 14 lb. The British Weights and Measures Act of 1835 formally codified the stone at 14 pounds, and it remains the customary way to express body weight throughout the United Kingdom and Ireland today.
The pound (abbreviated lb, from the Latin libra) is one of the most widely recognised units of weight in the world. In the imperial system and the US customary system, one pound equals exactly 0.45359237 kilograms. The pound is the primary unit of weight used in the United States for everything from body weight to groceries, while the UK uses it mainly in conjunction with stones for personal weight (e.g., "11 stone 4 pounds").
Understanding both units is essential for anyone navigating between American and British weight conventions. Medical records, fitness trackers, airline baggage limits, and sports statistics may use either unit depending on the country of origin. Because the conversion factor is a clean whole number (14), converting between stones and pounds is one of the simplest weight conversions you can perform—no decimals, no rounding, just straightforward multiplication or division.
Pounds = Stones × 14
Conversely: Stones = Pounds ÷ 14
The conversion is exact because one stone is defined as 14 pounds. There is no rounding or approximation involved. To go from stones to pounds, multiply by 14. To go from pounds to stones, divide by 14.
Question: A person weighs 10 stone. How much is that in pounds?
Solution:
This is roughly the weight of an average adult.
Question: A rugby player weighs 13 st 5 lb. What is that entirely in pounds?
Solution:
Mixed stone-and-pound notation is the most common format in the UK.
Question: An American traveller weighs 165 lb. How would they express this in stones?
Solution:
In decimal form: 165 / 14 = 11.786 stones.
Because 14 = 10 + 4, you can break the multiplication into easier steps. To convert 8 stones to pounds: 8 × 10 = 80, then 8 × 4 = 32, then 80 + 32 = 112 pounds. This works for any value. For 12 stone: 12 × 10 = 120, 12 × 4 = 48, total = 168 lb. Another helpful trick: each stone is just 2 pounds shy of 16 (one US pound-based "stone" worth), so if you know multiples of 16 you can subtract 2 per stone. But most people find the "times 10, times 4, add" method the fastest for mental arithmetic.
| Category | Stones | Pounds | Note |
|---|---|---|---|
| Underweight (BMI < 18.5) | 6-8 st | 84-112 lb | For average-height adults |
| Normal weight (BMI 18.5-24.9) | 8-12 st | 112-168 lb | Healthy range, varies by height |
| Overweight (BMI 25-29.9) | 12-15 st | 168-210 lb | For average-height adults |
| Obese (BMI 30+) | 15+ st | 210+ lb | Medical guidance recommended |
| Item | Stones | Pounds |
|---|---|---|
| Bag of cement | 3.57 st | 50 lb |
| Average suitcase (full) | 1.43 st | 20 lb |
| Mountain bike | 2.14 st | 30 lb |
| Car tyre | 1.57 st | 22 lb |
| Gold bar (standard) | 1.96 st | 27.4 lb |
| Bag of potatoes (large) | 1.79 st | 25 lb |
| Bowling ball (max) | 1.14 st | 16 lb |
| Microwave oven | 2.50 st | 35 lb |
UK doctors and the NHS record body weight in stones and pounds, while US medical records use pounds or kilograms. Accurate conversion is critical when sharing medical records internationally, calculating drug dosages based on body weight, or tracking weight loss and gain across different health apps and systems.
Airlines and travel regulations may specify luggage limits in pounds or kilograms, but travellers from the UK often think in stones. Quick conversion helps avoid excess baggage fees. Immigration forms and visa medicals in different countries also require weight in varying units.
Boxing weight classes, rugby stats, and weightlifting records are reported in different units depending on the governing body and country. British boxing uses stones (e.g., "11 stone 6"), while American boxing uses pounds. Gym equipment and fitness trackers may also default to different units.
British literature, historical texts, and everyday conversation frequently reference weight in stones. Understanding this unit helps when reading classic novels, interpreting historical records, or simply communicating with friends and family in the UK who describe their weight in stones and pounds.
A common mistake is assuming a stone equals 10 pounds (because of the decimal system) or 16 pounds (because 16 ounces = 1 pound). The correct factor is always 14. If in doubt, think of it as "a fortnight of pounds"—14, the same number as days in two weeks.
When someone says "12 stone 8," they mean 12 st + 8 lb = (12 × 14) + 8 = 176 lb. Do not multiply the entire expression by 14. Only the stones portion gets multiplied; the pounds are already in pounds.
A stone (6.35 kg) is much heavier than a kilogram. If someone says they weigh "10 stone," that is 140 lb or 63.5 kg—not 10 kg. Mixing up stones and kilograms leads to errors of roughly 6x magnitude.
In British English, the unit is commonly left as "stone" even for plural values (e.g., "she weighs 9 stone"). However, "stones" is also acceptable, particularly in writing. Both forms are correct, but using "stone" sounds more natural in UK English.
When converting pounds to stones, use division (not multiplication). A common error is accidentally multiplying when you should divide. If 10 st = 140 lb, then 140 lb ÷ 14 = 10 st. Always verify your answer makes sense: a value in stones should be roughly 1/14th of the value in pounds.
One stone equals exactly 14 pounds (lbs). This is a fixed, exact conversion factor defined by the imperial system. It never changes regardless of context, so you can always multiply stones by 14 to get pounds.
The stone remains popular in the United Kingdom and Ireland primarily for measuring body weight. It is deeply embedded in British culture and everyday language. When someone in the UK says they weigh "11 stone," locals instantly understand. The NHS, fitness centres, and bathroom scales in the UK commonly use stones and pounds alongside kilograms.
The stone is almost exclusively used in the United Kingdom and Ireland. Australia, New Zealand, and Canada once used it but have since adopted the metric system. The United States uses pounds directly, and most other countries use kilograms. You may encounter stones in older Commonwealth literature or historical documents.
First convert the whole stones to pounds by multiplying by 14, then add the remaining pounds. For example, 10 st 7 lb = (10 x 14) + 7 = 140 + 7 = 147 pounds. This mixed notation is the most common way body weight is expressed in the UK.
Divide the number of pounds by 14. The whole number is the stones, and the remainder is the leftover pounds. For example, 185 lb / 14 = 13 remainder 3, so 185 lb = 13 st 3 lb. Alternatively, 185 / 14 = 13.214 stones as a decimal.
The stone has been used in trade and commerce in Britain since at least the 14th century. Originally, "a stone" of different commodities could vary in weight (8 lb for meat, 14 lb for wool). In 1835, the British Weights and Measures Act standardised the stone at exactly 14 pounds avoirdupois, which is the definition still used today.
No. The stone is an imperial unit, not part of the International System of Units (SI). The SI unit of mass is the kilogram. However, the stone is still legally recognised in the UK as a supplementary unit and appears on many British scales and medical records alongside metric measurements.
This converter uses the exact mathematical relationship of 1 stone = 14 pounds, so it is perfectly accurate for any input value. There is no rounding or approximation involved in the base conversion factor. Results are displayed to four decimal places for pounds and six decimal places for stones to ensure precision.
This calculator uses the exact conversion factor of 1 stone = 14 pounds as defined by the imperial system. Results are mathematically precise. For medical decisions involving body weight, always consult a qualified healthcare professional. Weight ranges and BMI categories mentioned on this page are general guidelines and may not apply to all individuals, as factors like height, age, muscle mass, and bone density affect healthy weight ranges.