Pounds (lb)
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Equivalent weight
Accurate weight conversion tool for stones, pounds, kilograms, and ounces
Convert stones to pounds instantly with precise calculations. Includes bidirectional conversion, full weight breakdowns, and conversion tables for 2026.
Professional weight conversion for personal health, fitness, and everyday use in 2026
Convert stones to pounds with 100% precision using the exact conversion factor. One stone is defined as exactly 14 pounds — a fixed and universally agreed imperial standard. Our tool uses this precise factor to deliver reliable results for body weight tracking, luggage limits, and sporting weight categories.
Switch seamlessly between stones to pounds and pounds to stones conversion modes. Get instant results alongside related weight units including kilograms, ounces, and grams — all from a single input value. Perfect for comparing weight data between British and American measurement conventions.
Widely used in the UK and Ireland for measuring body weight, where stones remain the everyday standard. Essential for doctors, personal trainers, dietitians, and fitness apps converting between imperial and metric systems. Also used for boxing and wrestling weight categories and historical weight records.
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The stone (st) is a unit of mass in the British imperial system, defined as exactly 14 pounds (lb). It remains in everyday use in the United Kingdom and Ireland for measuring body weight, even though both countries have otherwise largely adopted the metric system. The stone's fixed relationship with pounds makes conversion simple and exact — there is no rounding or approximation involved.
The pound is also an imperial unit of mass, used widely in the United States and still common in the UK alongside stones. Understanding the relationship between stones and pounds is particularly important for healthcare settings in the UK, where patient weight is often recorded in stones and pounds on medical charts, then converted to kilograms for clinical calculations. A weight of 11 stone 4 pounds, for example, equals 158 lbs or approximately 71.7 kg.
1 stone = 14 lb = 6.35029318 kg = 224 oz = 6,350.29 g
Use this quick reference table for common stones to pounds conversions. All values use the exact factor of 14 and are ideal for body weight tracking, sports weight categories, dietary planning, and medical weight records in 2026.
| Stones (st) | Pounds (lb) | Kilograms (kg) | Ounces (oz) | Common Reference |
|---|---|---|---|---|
| 1 st | 14 lb | 6.35 kg | 224 oz | Very light adult |
| 2 st | 28 lb | 12.70 kg | 448 oz | Young child |
| 3 st | 42 lb | 19.05 kg | 672 oz | Small child |
| 4 st | 56 lb | 25.40 kg | 896 oz | Older child |
| 5 st | 70 lb | 31.75 kg | 1,120 oz | Pre-teen |
| 6 st | 84 lb | 38.10 kg | 1,344 oz | Teen / underweight adult |
| 7 st | 98 lb | 44.45 kg | 1,568 oz | Light adult |
| 8 st | 112 lb | 50.80 kg | 1,792 oz | Lightweight adult |
| 9 st | 126 lb | 57.15 kg | 2,016 oz | Average build |
| 10 st | 140 lb | 63.50 kg | 2,240 oz | Average adult |
| 11 st | 154 lb | 69.85 kg | 2,464 oz | Average adult |
| 12 st | 168 lb | 76.20 kg | 2,688 oz | Average-heavy adult |
| 13 st | 182 lb | 82.55 kg | 2,912 oz | Heavier adult |
| 14 st | 196 lb | 88.90 kg | 3,136 oz | Heavy adult |
| 15 st | 210 lb | 95.25 kg | 3,360 oz | Large adult |
| 16 st | 224 lb | 101.60 kg | 3,584 oz | Very large adult |
| 20 st | 280 lb | 127.01 kg | 4,480 oz | Heavyweight class |
| 25 st | 350 lb | 158.76 kg | 5,600 oz | Super heavyweight |
Converting stones to pounds is a straightforward multiplication. Since one stone equals exactly 14 pounds, simply multiply the number of stones by 14 to get the weight in pounds. To go the other way — pounds to stones — divide by 14. If you have a weight expressed as stones AND additional pounds (e.g. 11 st 6 lb), first convert the stones portion, then add the remaining pounds separately.
To convert stones to pounds mentally, multiply by 14. A useful shortcut: multiply by 10 then add 4 times the stones value. For example, 8 stone = (8 × 10) + (8 × 4) = 80 + 32 = 112 lb. For pounds to stones, divide by 14 — or divide by 7 then halve the result. These tricks work reliably across the common range of adult body weights.
Need to convert in the opposite direction? This table covers common pound values expressed in stones and in stones-and-pounds format. This is the format most commonly displayed on traditional British bathroom scales and used in NHS and GP weight records throughout the UK and Ireland.
| Pounds (lb) | Stones (st) decimal | Stones & Pounds | Kilograms (kg) | Common Reference |
|---|---|---|---|---|
| 100 lb | 7.143 st | 7 st 2 lb | 45.36 kg | Light adult |
| 110 lb | 7.857 st | 7 st 12 lb | 49.90 kg | Light adult |
| 120 lb | 8.571 st | 8 st 8 lb | 54.43 kg | Average female |
| 130 lb | 9.286 st | 9 st 4 lb | 58.97 kg | Average female |
| 140 lb | 10.000 st | 10 st 0 lb | 63.50 kg | Average adult |
| 150 lb | 10.714 st | 10 st 10 lb | 68.04 kg | Average adult |
| 160 lb | 11.429 st | 11 st 6 lb | 72.57 kg | Average male |
| 170 lb | 12.143 st | 12 st 2 lb | 77.11 kg | Average male |
| 180 lb | 12.857 st | 12 st 12 lb | 81.65 kg | Heavy male |
| 190 lb | 13.571 st | 13 st 8 lb | 86.18 kg | Heavy adult |
| 200 lb | 14.286 st | 14 st 4 lb | 90.72 kg | Heavyweight |
| 224 lb | 16.000 st | 16 st 0 lb | 101.60 kg | Very heavy adult |
| 252 lb | 18.000 st | 18 st 0 lb | 114.31 kg | Super heavyweight |
One stone equals exactly 14 pounds — a fixed definition with no decimal approximation. This relationship has been standardised since the Weights and Measures Act of 1824 in the UK. The pound itself is defined as exactly 0.45359237 kilograms, making the full chain from stones to metric fully traceable and exact.
The stone remains the dominant unit for expressing body weight in everyday conversation in the United Kingdom and Ireland, even though both countries officially use metric. British bathroom scales typically display weight in stones and pounds, and most UK adults instinctively express their weight as, for example, "11 stone 4" rather than 71.7 kg or 158 lb.
Boxing weight categories in the UK have historically been defined in stones. For example, the welterweight limit is 10 stone 7 lb (147 lb / 66.7 kg), and the heavyweight division begins at over 14 stone 4 lb (200 lb / 90.7 kg). Understanding the stone-to-pound relationship is essential for comparing UK and US boxing weight classification systems.
In UK healthcare settings, patients often give their weight in stones while medical records and drug dosage calculations require kilograms. Converting correctly is clinically important — a 10% error in body weight can affect medication doses, anaesthetic calculations, and BMI assessments. This converter handles the full chain: stones → pounds → kilograms instantly.
Americans express body weight exclusively in pounds (e.g. 165 lb), while British people typically use stones and pounds (e.g. 11 st 11 lb). The same person weighs 165 lb in the US and 11 st 11 lb in the UK — both correct, just using different conventions. This converter bridges both systems instantly for travellers, immigrants, and international comparisons.
One stone equals approximately 6.35029318 kilograms. To convert stones directly to kg, multiply by 6.35029318. For a quick mental estimate, multiply by 6.35 — accurate to within 0.005%. For example, 12 stone ≈ 12 × 6.35 = 76.2 kg. This is useful for gym-goers and athletes who train with both kg plates and stone-based weight targets.
The word "stone" as a unit of weight dates back to ancient times, when actual stones were used as counterweights on balance scales. Different regions of England once used different "stones" — the wool stone was 14 lb, the butcher's stone was 8 lb, and the glass stone was 5 lb. The standardisation of the stone at 14 pounds was formally established in England in 1835. Today it is only officially used in the United Kingdom and Ireland for body weight, making it one of the few remaining non-metric imperial units in everyday European use.
Knowing how to convert stones to pounds is useful in many everyday situations — from reading UK weight loss articles to comparing boxing champion statistics. Below are common real-world examples where this conversion is most frequently needed.
A frequent error is forgetting that the stone-and-pounds format uses remainder pounds, not decimal pounds. For example, 10.5 stone is NOT "10 st 5 lb" — it is actually "10 st 7 lb" (since 0.5 × 14 = 7). When converting a decimal stone value to stones-and-pounds format, always multiply the decimal portion by 14 to get the remaining pounds. Our calculator handles this automatically in the breakdown display.
Also see: Acres to Square Metres Converter and BTU to Joules Converter for more conversion tools on ConcretMetric.
UK healthcare professionals frequently need to convert patient-reported weights in stones to kilograms for clinical use. Our converter delivers the full chain — stones to pounds to kilograms — in one step, making it ideal for GP surgeries, hospitals, dietetic departments, and fitness professionals working across both measurement systems.
BTU to Joules Converter →Boxers, wrestlers, and MMA fighters competing under British rules need to convert weight categories between stones and pounds regularly. Our tool covers all common fighting weight classes from flyweight to heavyweight, with full kg equivalents displayed alongside the imperial values for international comparison.
Acres to m² Converter →Travellers flying from the UK frequently need to convert luggage weight limits between kilograms (used on European airlines) and stones or pounds. Our converter makes it quick to check whether your bags are within allowance — from standard 20 kg (3 st 2 lb) hold limits to premium 32 kg (5 st 0 lb) allowances.
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