Kilograms to Stone

Convert kilograms to stone instantly, with a reference table.

Kilograms to Stone conversion table
Kilograms (kg)Stone (st)
10.16
20.31
30.47
40.63
50.79
60.94
71.1
81.26
91.42
101.57
Formula: 1 kg = 0.157473 st. To convert, multiply your kilograms figure by 0.157473.

Free to use — premium coming soon

FREE
  • Instant conversion
  • Reference table
  • Reverse direction
PREMIUM
  • Remove ads
  • Custom table ranges
  • Bulk conversions

About the Kilograms to Stone

The Kilograms to Stone converter turns a metric weight into the stone-and-pound figure still used every day in the UK and Ireland for body weight. One stone equals exactly 14 pounds, or 6.35029318 kilograms, so the core calculation is simply your weight in kilograms divided by 6.35029318. Most people don't want a long decimal like 12.6 stone, though, which is why this tool also splits the answer into whole stones plus the leftover pounds. Enter a figure such as 80 kg and you get back 12 stone 8.4 lb, the format you would actually say out loud or read on a clinic chart.

Reach for this converter whenever a number comes to you in kilograms but your head thinks in stone. Smart scales, gym equipment, fitness apps, hospital records and packaging often report kilograms, while doctors, slimming groups and everyday conversation in Britain and Ireland still use stone. It is handy for tracking weight loss week to week, comparing your figure against a target set in stone, reading an athlete's stats, or just understanding what a metric reading means in familiar terms. Because it shows both the decimal stone value and the stone-and-pound breakdown, it suits both quick mental checks and precise record-keeping.

Conversion happens entirely in your browser using plain arithmetic, so there is no rounding shortcut hiding the real maths. The tool divides your kilogram value by 6.35029318 to get total stones, keeps the whole number as stones, then multiplies the remaining fraction by 14 to express the rest as pounds. Enter the figure, press convert, and the result appears below the form ready to copy. You can type decimals such as 72.5 kg, and the converter handles them without forcing you to round first, which matters when you are logging gradual changes.

Results are accurate to the official 1985 definition of the pound and the historic 14-pound stone fixed by the British Weights and Measures Act of 1835, so the figures match medical and legal standards rather than a loose approximation. Nothing you enter is uploaded, stored or shared: the calculation runs locally on your device, which makes it safe for something as personal as your own body weight. For most everyday purposes a result rounded to one decimal pound is plenty; for clinical use, record the original kilogram reading alongside the converted stone-and-pound value.

Frequently asked questions

How many kilograms are in one stone?

One stone equals exactly 6.35029318 kilograms, which is the same as 14 pounds. This value was fixed when the pound was standardised, so it is constant rather than an approximation.

How do I convert kilograms to stones and pounds by hand?

Divide your weight in kilograms by 6.35029318 to get total stones. Keep the whole number as stones, then multiply the leftover decimal by 14 to get the remaining pounds. For example, 80 kg ÷ 6.35029 = 12.598, so 12 stone and 0.598 × 14 = 8.4 lb.

What is 70 kg in stone?

70 kg is about 11.02 stone, which works out to roughly 11 stone 0.3 lb. The exact figure is 70 ÷ 6.35029318 = 11.0231 stone.

Why does the UK measure body weight in stone instead of kilograms?

It is mainly tradition. Although the kilogram is the official metric unit, the stone has been used for human body weight in the UK and Ireland for generations and remains common in everyday speech, slimming groups and many doctor conversations.

Is the stone used anywhere besides the UK and Ireland?

The stone is used almost exclusively for body weight in the UK and Ireland, with some older speakers in Australia still using it. Most other countries use kilograms or, in the US, pounds alone.

From our blog

Sticks, Cups, or Grams? A Practical Guide to Measuring Butter

By the Super Simple Digital Tools Team · Updated June 2026

Few ingredients cause as much measuring confusion as butter. In the United States it comes in wrapped sticks and is scooped by the cup or tablespoon; in Britain and Europe it arrives as a solid block and is weighed in grams; and plenty of vintage recipes still list it in ounces. None of these systems is wrong, but they rarely agree at a glance, which is why a quick conversion saves a lot of squinting at wrappers and mental arithmetic.

The good news is that butter conversions are built on a short list of fixed relationships. A single US stick is one half cup, eight tablespoons, four ounces, and about 113 grams. From there everything follows: a cup is two sticks or roughly 227 grams, a half cup is one stick, and a full pound is four sticks or about 454 grams. Memorise the stick and you can rebuild every other figure, because the units simply scale up and down from that one reference point.

Where people get caught out is mixing weight with volume. Grams measure how heavy the butter is, while cups and tablespoons measure how much space it takes up. The conversion between them only holds because butter has a fairly consistent density of about 0.911 grams per millilitre. That is why a tablespoon lands at roughly 14 grams rather than a round number, and why melted or whipped butter, which traps air or flows differently, will not pack into a cup the same way a cold block does.

International swaps deserve special care. The most common slip is assuming a 250 gram European block equals two American sticks. Two sticks are only 227 grams, so the block holds about 23 grams more, a little over a tablespoon and a half. For everyday baking you can trim 225 grams off the block to replace two sticks and move on. European butter also tends to have a slightly higher fat content than US butter, which mostly affects richness rather than the measurement itself.

Once you understand the ratios, a converter just removes the friction. Enter what your packaging or recipe gives you, read off the unit you need, and portion the butter with a knife against the printed wrapper marks or a kitchen scale. For precision baking, weighing in grams is the most reliable method because it sidesteps how firmly butter is pressed into a cup. For quick cooking, the stick and tablespoon marks are fast and accurate enough that nobody will notice the difference.

  • Use the printed lines on a US butter wrapper to slice tablespoons and 1/8-cup portions without a scale.
  • When a recipe needs two sticks but you have a 250 g block, cut off 225 g and set the rest aside.
  • For baking that depends on exact ratios, weigh butter in grams rather than packing it into a cup.
  • Soften or melt butter only after measuring it cold, since warm butter changes how it fills a measuring cup.

Read the full guide →

Tool by the Super Simple Digital Tools Team. Reviewed by our editorial team. Free to use, no signup required.

Related tools