Convert weight and mass units — kilograms, pounds, ounces, grams, tons, stones.
| Unit | Name | Value |
|---|---|---|
| kg | Kilogram | 6.35029 |
| g | Gram | 6350.29 |
| mg | Milligram | 6350290 |
| t | Metric Ton | 0.00635029 |
| lb | Pound | 14.000004 |
| oz | Ounce | 224.00007 |
The Stone (st) and the Pound (lb) are both units of weight & mass. Converting between them is straightforward using the formula above.
Formula: 1 st = 14 lb
This converter uses internationally recognized conversion factors. All calculations are performed client-side in your browser — no data is sent to any server.
| Stone (st) | Pound (lb) | Real-world context |
|---|---|---|
| 0.1 st | 1.4000004 lb | |
| 1 st | 14.0000044 lb | |
| 5 st | 70.000022 lb | |
| 10 st | 140 lb | |
| 100 st | 1400.0004 lb |
1 stone (st) equals exactly 14.0000044 pounds (lb). Use the formula: st × 14.0000044 = lb.
To convert stone to pounds, multiply your value in stone by 14.0000044. For example, 5 st × 14.0000044 = 70.000022 lb.
100 stone = 1400.0004 pounds. Calculation: 100 × 14.0000044 = 1400.0004.
To convert pounds back to stone, divide by 14.0000044 (or multiply by 0.07142855). Example: 10 lb ÷ 14.0000044 = 0.71428549 st.
Yes. This converter uses the internationally recognised exact conversion factor: 1 st = 14.0000044 lb. All calculations are performed in your browser with no rounding until display.
10 stone = 140 pounds. Simply multiply by 14.0000044.
Converting stone to pounds is commonly needed for everyday tasks like cooking recipes, body weight tracking, shopping internationally, or shipping parcels where one system uses st and another uses lb.
The stone (st) is a British imperial unit of mass equal to exactly 14 avoirdupois pounds or 6.35029318 kilograms. Used almost exclusively in the United Kingdom and Ireland for human body weight, it has no role in scientific, commercial, or international contexts. The stone is not an SI unit and was removed from official UK trade measurement in 1985, though it remains deeply embedded in everyday British culture.
The pound (lb) is the primary unit of mass in the US customary and British imperial systems, equal to exactly 453.59237 grams since the International Yard and Pound Agreement of 1959. It is subdivided into 16 ounces. The abbreviation "lb" comes from the Latin libra (scales/balance), while "pound" derives from Latin pondus (weight).
One of the oldest English weight units, the stone was referenced as early as the 13th century. Historically its value varied by commodity (8 lb for meat, 12 lb for hemp, 14 lb for wool, 16 lb for glass). King Edward III standardised the wool stone at 14 pounds in 1350, which became the universal English standard. The Weights and Measures Act 1835 formally defined the stone as 14 lb. EU harmonisation abolished the stone for trade in 1985.
Interesting fact: The world record heaviest person weighed 635 kg — exactly 100 stone, illustrating how the stone unit provides digestible reference points for large body weights. British people typically express their weight as, for example, "11 stone 4 pounds."
The pound traces its origins to ancient Rome's libra pondo (pound weight, ~329 g). Various standards existed in medieval Europe — Troy, Tower, and merchant pounds — until the avoirdupois pound emerged in 13th–14th century England for general trade. The British Weights and Measures Act 1878 formalised it. The modern definition (453.59237 g) was fixed by the US, UK, Australia, Canada, New Zealand, and South Africa in 1959.
Interesting fact: The word "pound sterling" originally meant one pound (12 troy ounces) of sterling silver. Today's British pound currency takes its name from the unit of mass, not the other way around.