Stones to Kilograms Converter

One stone equals 6.35029 kilograms. Multiply stones by 6.35029 to convert. For example, 10 stone = 63.5 kg and 13 stone = 82.6 kg. This conversion is essential when switching between UK and metric body weight measurements.

Stones

Kilograms

Common Conversions

Key Takeaways

1 stone = 6.35029 kg. Multiply stones by 6.35029 to get kilograms.
For stones and pounds: convert pounds to a fraction of a stone (divide by 14), then multiply the total by 6.35029.
Common values: 8 st = 50.8 kg, 10 st = 63.5 kg, 12 st = 76.2 kg, 14 st = 88.9 kg.
UK doctors use kilograms officially but many patients think in stones.
The stone (6.35 kg) equals exactly 14 pounds, a ratio fixed by law in 1835.

How Do You Convert Stones to Kilograms?

Multiply the number of stones by 6.35029 to get kilograms. The formula is: Kilograms = Stones x 6.35029. For mixed measurements like 11 stone 7 pounds, first convert the pounds to a fraction of a stone (7 / 14 = 0.5), then multiply the total: 11.5 x 6.35029 = 73.03 kg.

Sam, the realtor in Pinewood Falls, ordered gym equipment from a UK seller that listed a barbell set as weighing 7 stone. He needed to know the weight in kilograms for shipping calculations: 7 x 6.35029 = 44.45 kg, or about 98 pounds. Knowing the metric equivalent helped him choose the right freight option.

Stones to Kilograms Reference Table

Stones	Kilograms	Pounds
7 st	44.45 kg	98 lb
8 st	50.80 kg	112 lb
9 st	57.15 kg	126 lb
10 st	63.50 kg	140 lb
11 st	69.85 kg	154 lb
12 st	76.20 kg	168 lb
13 st	82.55 kg	182 lb
14 st	88.90 kg	196 lb
15 st	95.25 kg	210 lb
16 st	101.60 kg	224 lb
18 st	114.31 kg	252 lb
20 st	127.01 kg	280 lb

When Do You Need This Conversion?

Medical and Health Records

UK patients often know their weight in stones but need kilograms for medical purposes. Drug dosages, anesthesia calculations, and BMI formulas all use kilograms. A patient who says they weigh 13 stone needs to know that is 82.55 kg so the doctor can calculate the correct medication dose.

International Travel and Relocation

When moving from the UK to a country that uses the metric system, weight records need converting. Leah from Pinewood Falls has a pen pal in London who mentioned weighing 9 stone 4. Leah calculated: 9 + (4/14) = 9.286 stone, then 9.286 x 6.35029 = 58.97 kg, or about 130 pounds. This made the number relatable.

Fitness Equipment and Weight Classes

Boxing and rugby in the UK still reference stones. A heavyweight boxer at 16 stone weighs 101.6 kg (224 lb). Dana, who builds home gyms in Pinewood Falls, sometimes sources equipment from UK suppliers where plate weights are labeled in stones. Converting to kilograms ensures her clients get the right load for their training programs.

Frequently Asked Questions

How many kilograms are in a stone?

One stone equals 6.35029 kilograms. Multiply the number of stones by 6.35029 to convert. For example, 10 stone = 63.5 kg and 12 stone = 76.2 kg.

How do I convert stones and pounds to kilograms?

First convert everything to stones by dividing the pounds by 14 and adding to the stones. Then multiply by 6.35029. For example, 11 stone 7 lb: the 7 pounds = 7/14 = 0.5 stone, so 11.5 stone x 6.35029 = 73.03 kg.

What is 10 stone in kg?

Ten stone equals 63.50 kilograms (10 x 6.35029 = 63.50 kg). This is equivalent to approximately 140 pounds and is a common benchmark weight used in UK health discussions.

Do doctors in the UK use stones or kilograms?

UK medical professionals officially use kilograms for clinical records, prescriptions, and drug dosages. However, many patients and some GPs still discuss weight in stones informally. NHS weight management programs typically show both units to avoid confusion.

Is the stone used anywhere outside the UK?

The stone is primarily used in the UK and Ireland. It was formerly used in Australia, Canada, and other Commonwealth countries, but those nations switched to kilograms during metrication in the 1970s. Today, the UK and Ireland are the only countries where stones remain in common everyday use.