Stones ⇄ Kilograms Converter

This converter allows you to easily switch between stones and kilograms — two widely used units of mass in the UK and international systems. It’s ideal for fitness tracking, body weight reporting, and global health or nutrition records.

The stone (st) is a British unit commonly used to measure body weight in the UK and Ireland. The kilogram (kg), part of the metric system, is the standard unit of mass in most other countries. To convert from stones to kilograms, multiply by 6.35029. To convert back, divide by the same number.

This converter does both directions instantly: type in either stones or kilograms, and the other updates automatically. It removes the need for mental math or searching conversion charts.

Common conversions are also included for convenience: 10 st = 63.5 kg, 14 st = 88.9 kg, etc. This is especially helpful when filling out medical forms, comparing international fitness data, or reading health publications.

Built with Tailwind CSS, the tool is fully mobile responsive and optimized for performance. Whether you're on a phone or desktop, it loads quickly and works smoothly.

You don’t need an app or signup — just visit, convert, and continue. Bookmark this tool if you’re a coach, athlete, dietitian, or anyone who frequently deals with UK–metric weight conversions.

This page is part of a full collection of conversion tools on our site. Explore others including kilograms ⇄ pounds, grams ⇄ ounces, and more for a complete weight conversion experience.