What Is Kg to Stone Conversion?

The stone is a traditional unit of weight still commonly used in the UK and Ireland, especially for measuring body weight. While most of the world uses kilograms, understanding stone is essential when reading British scales, medical records, or communicating with UK healthcare.

When You Need This Conversion

Reading UK scales — Many British bathroom scales show stone
NHS medical records — Doctors may record weight in stone
Communicating with UK friends — They'll understand stone better
Moving to the UK/Ireland — Adapting to local conventions
UK health apps — Some use stone as default
Historical records — Older documents use stone

The Conversion Factor

One stone equals exactly 6.35029 kilograms (or exactly 14 pounds). To convert kg to stone, divide by 6.35.

Why Stone Persists in the UK

Despite official metrication in 1985, stone remains culturally ingrained for body weight in Britain. People understand "I weigh 11 stone" better than "70 kilos" — it's simply tradition.

How to Convert Kg to Stone

Using This Converter

Enter your weight in kilograms
See the stone equivalent instantly
Use swap to convert stone to kg
Copy the result for your records

Quick Mental Math

Divide by 6.35 — Exact conversion
Divide by 6.5 — Easier mental math, close enough
Or remember: 10 stone ≈ 63.5 kg, then adjust

Common Reference Points

50 kg ≈ 7.9 stone (light adult)
60 kg ≈ 9.4 stone
70 kg ≈ 11 stone (average adult)
80 kg ≈ 12.6 stone
90 kg ≈ 14.2 stone
100 kg ≈ 15.7 stone

Stone and Pounds Together

In the UK, weights are often expressed as "X stone Y pounds" (e.g., 11 stone 4 lbs). This converter shows decimal stone — multiply the decimal part by 14 to get remaining pounds.

Features & Use Cases

Instant Bidirectional Conversion

Convert between kilograms and stone with one click. Essential for anyone moving between metric and UK imperial contexts.

Common Use Cases

UK Healthcare

The NHS officially uses kilograms, but many patients and older practitioners still think in stone. Convert to communicate clearly with British healthcare providers.

Bathroom Scales

Many British bathroom scales display stone. If yours shows kilograms but you prefer stone, use this converter for your regular weigh-ins.

Social Contexts

When discussing weight with British friends or family, stone is more intuitive for them. "I've lost half a stone" resonates more than "3 kilos."

Fitness Goals

UK fitness forums and weight loss communities often track progress in stone. Convert your metric goals to participate in these discussions.

Emigrating to the UK

If you're moving from a metric country, learning to think in stone helps with social integration and understanding local conversations.

Reference Table

Body weight ranges from 50 kg to 100 kg with their stone equivalents for quick reference.

Frequently Asked Questions

How many kg in a stone?

One stone equals 6.35029 kilograms exactly, or approximately 6.35 kg.

Why does the UK use stone?

Stone was the legal weight measure until 1985. Despite metrication, it remains culturally embedded for body weight, especially among older generations.

How do I express weight as "stone and pounds"?

Convert kg to stone, take the whole number, then multiply the decimal by 14 to get pounds. Example: 75 kg = 11.81 stone = 11 stone 11 lbs.

Do doctors in the UK use stone or kg?

Officially, the NHS uses kilograms. However, many patients prefer to discuss their weight in stone, and scales in GP surgeries often show both.

What's a healthy weight in stone?

This depends on height. A 5'7" adult might have a healthy range of 9-12 stone. Use BMI calculators alongside weight conversion for health assessment.

Is stone used anywhere besides the UK?

Ireland also commonly uses stone for body weight. Australia and other former British colonies abandoned it in favor of kilograms.

Kilograms to Stone