You’ve just stepped off a scale showing kilograms, but in your head, like most people in the UK and Ireland, you still think in stones and pounds. That mental maths gets old fast, especially mid-workout or at a doctor’s appointment.
That’s exactly why this tool exists. Type your weight in kilograms and get an instant result in stones, pounds, or both, no sign-up, no downloads, nothing to install. It works the other way too, so you can flip between stone and kg with a single click.
Leave pounds blank for whole-stone conversion.
Tip: In the UK, body weight is often written as stones and pounds, such as 11 st 0 lb.
Here’s something interesting, the UK officially adopted the metric system back in the 1960s and 70s. Kilograms became the legal standard. And yet, if you ask most British or Irish people how much they weigh, they’ll still say something like “I’m about 12 stone” rather than “I’m 76 kilograms.”
It’s not stubbornness. It’s just habit, passed down through generations. Doctors might write kilograms in your notes, but the number that sticks in your head is almost always in stone. That cultural familiarity is exactly why a kg to stone converter is one of the most searched weight tools online, millions of people use one every month for exactly this reason.
Here’s something interesting, the UK officially adopted the metric system back in the 1960s and 70s. Kilograms became the legal standard. And yet, if you ask most British or Irish people how much they weigh, they’ll still say something like “I’m about 12 stone” rather than “I’m 76 kilograms.”
It’s not stubbornness. It’s just habit, passed down through generations. Doctors might write kilograms in your notes, but the number that sticks in your head is almost always in stone. That cultural familiarity is exactly why a kg to stone converter is one of the most searched weight tools online, millions of people use one every month for exactly this reason.
Here’s a quick example with 75 kg:
Of course, you don’t need to do any of that manually. Just type your weight into the converter at the top of this page and it handles everything, including breaking the result into stones, pounds, and even ounces if you need that level of detail.
One thing worth knowing: always use the full 6.35029 conversion factor rather than rounding to 6.35. It sounds like a small difference, but across multiple conversions it actually matters, especially if you're tracking your weight over time.
It’s easy to get confused between these three units, so here’s a quick breakdown.
A kilogram is a metric unit used by most of the world. It's the standard on almost every bathroom scale sold today, and it's what your doctor uses on your medical record.
A stone is a British imperial unit equal to exactly 14 pounds. It's not used anywhere else in the world for body weight, it's uniquely British and Irish, which is part of what makes it feel so personal to people from those countries.
A pound sits between the two, it's smaller than a stone but larger than what kilograms break down into for everyday use. One kilogram is roughly 2.2 pounds, which is why pound figures always look bigger than kilogram ones for the same weight.
So when someone says they're "11 stone 4," they mean 11 multiplied by 14 pounds, plus 4 more, that's 158 pounds, or about 71.6 kg. All three numbers describe the exact same person. This converter handles all of those calculations instantly.
More often than you might think. Here are a few real situations where a quick kg to stone conversion genuinely saves you time:
Your gym scale shows kilograms, but your goal is set in stones. Instead of doing mental gymnastics every morning, just enter the number and you're done. It also makes it much easier to share your progress with friends or a coach who thinks in stone too.
GP surgeries in the UK typically record your weight in kilograms. But most patients still prefer to know their weight in stone. This converter bridges that gap instantly, so you're never left staring blankly at a number that doesn't mean anything to you.
Dumbbells, kettlebells, and weight plates are listed in kilograms by some retailers and in pounds or stone by others. Being able to switch between units quickly means you know exactly what you're getting before you buy.
If you're moving between the UK and a country that uses only metric units, or vice versa, weight conversions come up constantly. Luggage allowances, food packaging, medical paperwork, all of it.
One area where this conversion comes up more than most people expect is health monitoring. BMI calculators, NHS weight guidelines, and most health apps display results in kilograms. But if you’ve always thought of your weight in stone, those numbers can feel abstract and hard to act on.
Converting your weight to stone doesn’t just make the number feel familiar, it actually helps you set more meaningful goals. Saying “I want to lose half a stone” feels much more real than “I want to lose 3.2 kilograms,” even though they mean exactly the same thing.
It’s also worth knowing that healthy weight ranges are sometimes listed in both systems on NHS resources. So whether you’re checking a BMI chart, speaking with a GP, or following a fitness programme, being able to quickly switch between kilograms and stone keeps everything connected and easy to understand.
Here’s a quick reference for the weights people look up most often. If your exact weight isn’t listed, just use the converter above, it handles any value, including decimals.
| Kilograms | Stones & Pounds |
|---|---|
| 50 kg | 7 st 12.2 lb |
| 55 kg | 8 st 9.3 lb |
| 60 kg | 9 st 6.3 lb |
| 65 kg | 10 st 3.3 lb |
| 70 kg POPULAR | 11 st 0.3 lb |
| 75 kg POPULAR | 11 st 11.3 lb |
| 80 kg POPULAR | 12 st 8.4 lb |
| 85 kg | 13 st 5.4 lb |
| 90 kg | 14 st 2.4 lb |
| 95 kg | 14 st 13.4 lb |
| 100 kg | 15 st 10.5 lb |
| 110 kg | 17 st 4.5 lb |
| 120 kg | 18 st 12.6 lb |
Most people come here to go from kilograms to stone, but sometimes you need it the other way around. Maybe a friend mentioned their weight in stone and you want to know what that is in kg, or you’re filling out a form that only accepts metric values.
The reverse conversion is just as simple. Multiply the stone value by 6.35029 to get kilograms. If there are remaining pounds, divide those by 2.20462 and add them on.
So for someone who weighs 13 stone 5 pounds:
13 × 6.35029 = 82.55 kg
5 ÷ 2.20462 = 2.27 kg
Total = 84.82 kg
Multiply stone value by 6.35029 →
13 × 6.35029 = 82.55 kg
Divide remaining pounds by 2.20462 →
5 ÷ 2.20462 = 2.27 kg
Add both values together
Again, you don’t need to do this by hand. The converter on this page handles both directions, just switch the input and type your stone value.
These are small things, but they’re worth keeping in mind if precision matters to you:
Weigh yourself at the same time each day, ideally in the morning before eating, and then convert. This gives you a consistent baseline that's actually useful for tracking changes over time.
Remember that one stone is 14 pounds, not 10. It's one of the most common mistakes people make when trying to do this conversion in their heads.
If you ever need to convert stone back to kilograms without the tool, multiply your stone value by 6.35029, then add any remaining pounds divided by 2.20462. But honestly, just use the converter — it's faster and it's accurate every time.
One stone equals exactly 6.35029 kilograms, or roughly 6.35 kg. So if someone says they weigh 10 stone, that's about 63.5 kg.
Divide your weight in kilograms by 6.35029 to get the total in stones. The whole number is your stones figure. Then multiply the decimal remainder by 14 to get the remaining pounds. For example, 80 kg ÷ 6.35029 = 12.598, so that's 12 stone 8.4 pounds.
70 kg works out to 11 stone and 0.2 pounds, so effectively 11 stone. It's one of the most commonly searched conversions, and it's a very common body weight for adults.
75 kg equals 11 stone 11.3 pounds. So if someone says they're "nearly 12 stone," they're probably around the 75–76 kg range.
80 kg converts to 12 stone 8.4 pounds, just over 12 and a half stone.
It comes down to cultural habit more than anything else. The stone has been used in Britain for centuries to measure body weight, and even though kilograms are now the official standard, most people still think and talk about their weight in stone. It's familiar, it's intuitive, and it's not going away anytime soon.
Yes, absolutely, especially in the UK and Ireland. While kilograms appear on official forms and medical records, stone remains the unit most people actually use in day-to-day conversation when talking about body weight.
Yes. The converter works in both directions. Just switch the input direction with one click and enter your weight in stones to get the equivalent in kilograms.
Yes, it works on any device with a web browser, phones, tablets, laptops, desktops. No app download needed. Just open the page, enter your weight, and the answer appears immediately.
Very accurate. It uses the exact conversion factor of 1 stone = 6.35029 kg rather than a rounded figure, which gives you precise results for any weight you enter, including decimals.
The formula is: divide kilograms by 6.35029 to get the total in stones. Take the whole number as your stone value, then multiply the decimal remainder by 14 for the pounds. This is the same formula our converter uses automatically.
Weight conversions don't need to be complicated. Whether you're tracking your fitness, making sense of a number at the doctor's, or just curious, this converter gives you an accurate answer in seconds. The stone isn't going anywhere in the UK and Ireland anytime soon, and neither is the need to switch between the two systems. Bookmark this page and come back whenever you need it.