Kilograms to Stone Converter

About the Kilograms to Stone Converter

This converter translates kilograms into stone, the weight unit still used in the UK and Ireland for everyday body-weight reporting. One stone equals 6.35029 kilograms, or exactly 14 pounds. That makes the conversion straightforward, but the unit is still easy to misread if you are used only to kilograms or pounds.

Alongside the decimal result, it shows the familiar stone-and-pounds format used on British scales and in casual conversation, such as 70 kg = 11 st 0 lb. It also converts the same value into pounds, grams, ounces, and related units so you can compare metric and imperial readings at a glance. The extra outputs help when a medical chart, gym scale, or discussion thread uses different conventions.

The BMI table is there as a rough reference for height-based context, while the primary output stays focused on straightforward unit conversion. That keeps the page useful for both quick conversions and a little extra weight-context checking.

When This Page Helps

If you track weight in kilograms but need to read or share it in stone, this converter gives the decimal value and the traditional st-lb split in one place. That is useful for UK gym equipment, medical forms, and side-by-side metric versus imperial comparisons. It also helps when you want to sanity-check a weight before entering it into a form or app that expects stone.

How to Use the Inputs

1. Enter a numeric value.
2. Select the source unit (kg, stone, lb, etc.).
3. Read stone and the st-lb breakdown.
4. Use presets for common body weights.
5. Check the kg-to-stone table for batch reference.
6. Expand the BMI section for health context.

Example Calculation

Tips & Best Practices

• 1 stone = 14 pounds = 6.35029 kilograms.
• In the UK, body weight is given as "X stone Y pounds" (e.g., "10 stone 7").
• Most bathroom scales in the UK have a kg/st/lb toggle.
• The stone is not commonly used in the US, Canada, or continental Europe.
• For quick estimation: 10 stone ≈ 63.5 kg ≈ 140 lb.
• BMI = weight (kg) ÷ height (m)² — use the reference table to check.

History of the Stone

The stone has been used in the British Isles since the Middle Ages. Different commodities originally had different stone values (e.g., 5 lb for glass, 8 lb for meat). The 14-pound stone was standardized in 1835 and remains the common body weight unit in the UK and Ireland.

UK vs. US Weight Reporting

Ask a British person their weight and they will say "11 stone 7" (161 lb / 73 kg). Ask an American and they will say "161 pounds." Ask a European and they will say "73 kilograms." This converter handles all three conventions.

BMI and Body Weight Context

The BMI reference adds practical value: knowing you weigh 80 kg means little without height context. At 180 cm, that is a BMI of 24.7 (normal); at 165 cm, it is 29.4 (overweight). The table makes this check instant.

Frequently Asked Questions

• How many kg in a stone?

  1 stone equals 6.35029 kilograms. That fixed ratio is the basis for the stone-to-kilogram conversion on the page.

• How many pounds in a stone?

  1 stone equals exactly 14 pounds. That is why the stone-and-pounds split is easy to read once the decimal stone value is known.

• How do I convert kg to stone and pounds?

  Divide kg by 6.35029 for stone. Then multiply the decimal part by 14 for the remaining pounds, which gives the traditional UK body-weight format.

• Is stone used in the US?

  No, the US uses pounds for body weight. Stone is used in the UK and Ireland, so Americans usually need a conversion when reading those values.

• What is a healthy weight in stone?

  It depends on height. A 5'7" person with a healthy BMI is roughly 8 st 7 lb to 11 st 3 lb, which is about 54 to 72 kg.

• Where did the stone unit come from?

  The stone is an ancient British unit that was standardized at 14 pounds in 1835. It remains in use for body weight even though metric is now official.