Weight & Mass converter
Converting stones to kilograms is a small, specific task, but getting it wrong by even a rounding error can throw off a recipe, a shipping quote, a construction cut list, or a homework answer. This page runs a live Stones to Kilograms converter — type a number in st and get the exact kg equivalent instantly, calculated with the standard conversion factor rather than an approximation. One st equals 6.35029 kg, and the calculator below scales that ratio to any amount you enter.
To convert a value from stones to kilograms, multiply the number of st by 6.35029. That figure comes from expressing both units against the same reference — in this case, weight & mass are compared through a common weight & mass base unit — so the ratio holds no matter how large or small the input is.
Common st amounts and their kg equivalents, rounded to six decimal places for accuracy:
Weight & Mass conversions come up constantly outside of a classroom. Recipes written for a US audience use ounces and pounds while international ones use metric measurements; travel and navigation mix miles, kilometers, and nautical units depending on the country and mode of transport; and technical fields like engineering, medicine, and manufacturing often require converting between systems to match a spec sheet, a prescription, or a purchase order.
Manual conversion is where mistakes creep in — misplacing a decimal, using an outdated or rounded factor, or mixing up which unit is larger. Because this converter applies the exact multiplier every time, the result for stones to kilograms is consistent whether you're converting a single small number or a large batch of values one at a time.
1 st equals 6.35029 kg. Multiply any st value by this factor to get kg.
It uses the standard defined conversion factor for stones and kilograms, so results are precise to the rounding shown, not a rough estimate.
Yes — use the swap control in the calculator to reverse the direction and convert kilograms into stones instead.
No. The calculation runs locally in your browser using JavaScript, so nothing you type is sent anywhere.
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| Stones | Kilograms |
|---|---|
| 1 st | 6.35029 kg |
| 5 st | 31.75145 kg |
| 10 st | 63.5029 kg |
| 25 st | 158.75725 kg |
| 50 st | 317.5145 kg |
| 100 st | 635.029 kg |
| 500 st | 3175.145 kg |
| 1000 st | 6350.29 kg |