Stone to Kilograms Converter
Convert imperial stone (st) to metric kilograms (kg) instantly. A standard tool for international fitness tracking, bodyweight goals, and health records in the UK and Ireland.
Result in Kilograms (kg)
The Imperial Stone
The stone was historically used across Europe for weighing various goods, but survives today primarily in the UK and Ireland for personal weighing. Understanding the metric equivalent (kg) is essential for monitoring bodyweight goals and inputting data into modern international fitness software like Apple Health or MyFitnessPal.
What is a Stone?
A stone is defined as exactly 14 pounds. It is the standard unit in the UK and Ireland for tracking personal bodyweight progress and athletic categories.
What is a Kilogram?
The international SI unit of mass. 1 kg is roughly the weight of one liter of water and is the universal standard for medicine.
Conversion Formula
Mathematical Proof
kg = st × 6.35029
Multiply the stone value by 6.35 to get the equivalent metric kilograms. This precision is vital for athletes tracking marginal gains or maintaining specific weight classes.
Stone to Kg Reference Table
Stone (st) Kilograms (kg) 1 st 6.35 kg 5 st 31.75 kg 10 st 63.50 kg 12 st 76.20 kg 15 st 95.25 kg 20 st 127.01 kg International Bodyweight Milestones
Fitness Goal Stone & Lbs Metric (kg) Lightweight Athlete 9 st 0 lbs 57.15 kg Middleweight Goal 11 st 0 lbs 69.85 kg Cruiserweight Goal 13 st 0 lbs 82.55 kg Heavyweight Milestone 15 st 0 lbs 95.25 kg Powerlifting Entry 17 st 0 lbs 107.95 kg Strongman Benchmark 20 st 0 lbs 127.01 kg Fitness Weight FAQ