stone to kilograms converter

How to use it

1. Enter your stone value into the input field. Type any whole number, decimal, or fraction such as 10.5 or 12 ½.
2. The converter multiplies your input by 6.35029318 and displays the kilogram result below as you type.
3. Copy the kilogram figure from the result area and paste it into your document, message, or spreadsheet.
4. Clear the input and repeat the process for any additional stone values without refreshing the page.

Where it comes in handy

A pharmacist in Scotland dispenses a dose calculated per kilogram, but the prescription lists the patient’s weight as 11 st. Converting to kilograms gives 69.85 kg, letting the dose be computed correctly.

A UK fitness tracker records a personal best at 9 st 4 lb (approximately 58.97 kg), and the user wants to share that milestone on an international running forum where kilograms are standard.

An e-commerce seller ships a package priced by weight at 3 st. Knowing the metric equivalent of 19.05 kg helps determine shipping costs on platforms that only accept kilogram inputs.

Worth knowing

• This tool handles only avoirdupois stone (the unit used for body weight and general mass in the UK); it does not apply to troy stone, which is rarely used today.
• The result is exact to the decimal places shown, but for most everyday uses two decimal places are sufficient. Rounding beyond that only matters in medical dosing or scientific work where small differences shift outcomes.
• Stone can represent either a whole number or a mixed value such as 10 st 7 lb. Enter the total in decimal form — for example, 10 st 7 lb becomes 10.4375 — before converting, because the calculator accepts stone alone, not separate pound inputs.

Quick st to kg reference