Stone to Kilograms

What Is Stone to Kg Conversion?

If you grew up in the UK using stone, you'll often need to convert to kilograms for medical forms, international travel, and modern fitness apps. This converter makes that translation instant and accurate.

When You Need This Conversion

• Medical forms — Hospitals and clinics often require kg
• International travel — Visa and insurance forms use kg
• Fitness apps — Most use kilograms as default
• Scientific contexts — Research papers use metric
• Moving abroad — Learning to think in kg
• Online shopping — Size guides use kg/lbs, rarely stone

The Conversion Factor

One stone equals exactly 6.35029 kilograms. Multiply your stone weight by 6.35 for a quick approximation.

Stone and Pounds to Kg

If you weigh 11 stone 7 lbs, convert separately: 11 × 6.35 = 69.9 kg, then add 7 lbs (3.2 kg) = 73.1 kg total.

How to Convert Stone to Kg

Using This Converter

1. Enter your weight in stone
2. See the kilogram equivalent instantly
3. Use swap to convert kg to stone
4. Copy the result for forms or apps

Quick Mental Math

• Multiply by 6.35 — Exact conversion
• Multiply by 6 and add half — Close approximation
• Remember: 10 stone = 63.5 kg as anchor

Common Reference Points

• 8 stone = 50.8 kg
• 9 stone = 57.2 kg
• 10 stone = 63.5 kg
• 11 stone = 69.9 kg
• 12 stone = 76.2 kg
• 13 stone = 82.6 kg
• 14 stone = 88.9 kg
• 15 stone = 95.3 kg

For Medical Forms

Most international medical forms ask for weight in kilograms. Convert your stone weight accurately for travel insurance, visa applications, and hospital admission forms.

Features & Use Cases

Instant Bidirectional Conversion

Convert between stone and kilograms with one click. Essential for UK residents needing metric weights.

Common Use Cases

Medical & Healthcare

International hospitals, travel insurance, and medical research use kilograms. Convert your stone weight for accurate health records abroad.

Fitness Apps & Wearables

Most fitness trackers, smart scales, and apps default to kilograms. Convert to set up your profile correctly.

Air Travel

International airlines, visa applications, and travel documents often ask for weight in kilograms. Know your metric weight before traveling.

Sports & Athletics

International competitions, weight classes, and sports science use kilograms. Convert to understand your category or training targets.

Online Shopping

Product size guides (bikes, sports equipment, furniture weight limits) typically use kg. Know your metric weight for proper sizing.

Reference Table

Stone values from 8 to 18 with their kilogram equivalents, covering common adult weight ranges.

Frequently Asked Questions

How many kg are in a stone?

One stone equals 6.35029 kilograms exactly, commonly rounded to 6.35 kg.

How do I convert 12 stone 7 lbs to kg?

Convert separately: 12 stone = 76.2 kg, 7 lbs = 3.2 kg. Total: 79.4 kg.

Why do fitness apps use kilograms?

Most fitness apps are designed for global markets. Kilograms are the international standard, used by 95% of the world's population.

What's 10 stone in kg?

10 stone equals exactly 63.5029 kg, commonly rounded to 63.5 kg.

Is it okay to use approximate conversions?

For general fitness tracking, rounding to the nearest 0.5 kg is fine. For medical purposes, use the full precision.

How do I set my weight in a metric fitness app?

Multiply your stone by 6.35, add any extra pounds × 0.45, and enter the total in the app's weight field.