9 Stone to KG: Convert 9 Stone and Pounds to Kilograms

9 stone is 57.15 kg. The exact figure is 57.153 kg, which is the same as 126 pounds. To convert 9 stone to kg, multiply 9 by 6.35029.

Below you will find the working for 9 stone to kg, the figure for each extra pound up to 10 stone, and a guide to what 57.15 kg means at different heights.

How do you convert 9 stone to kg?

Multiply 9 by 6.35029, which is how many kilograms are in a stone. Nine times 6.35029 is 57.15261, or 57.15 kg to two decimal places.

The same answer comes out if you go through pounds:

1. 9 stone × 14 = 126 pounds
2. 126 pounds × 0.453592 = 57.15 kg

The pounds route is the one to use when your weight is not a round number of stone. For 9 stone 8, add 8 to 126 to get 134 pounds, then multiply by 0.453592. The answer is 60.78 kg.

What is 9 stone and a few pounds in kg?

Each extra pound adds 0.45 kg. This table covers every weight from 9 stone 0 to 9 stone 13.

Stone and pounds	Kilograms	Pounds only
9 st 0 lb	57.15 kg	126 lb
9 st 1 lb	57.61 kg	127 lb
9 st 2 lb	58.06 kg	128 lb
9 st 3 lb	58.51 kg	129 lb
9 st 4 lb	58.97 kg	130 lb
9 st 5 lb	59.42 kg	131 lb
9 st 6 lb	59.87 kg	132 lb
9 st 7 lb	60.33 kg	133 lb
9 st 8 lb	60.78 kg	134 lb
9 st 9 lb	61.23 kg	135 lb
9 st 10 lb	61.69 kg	136 lb
9 st 11 lb	62.14 kg	137 lb
9 st 12 lb	62.60 kg	138 lb
9 st 13 lb	63.05 kg	139 lb

Notice that 60 kg, a common round figure, sits between 9 stone 6 and 9 stone 7. Nine and a half stone is 60.33 kg.

Is 9.5 stone the same as 9 stone 5?

No. 9.5 stone means nine and a half stone, which is 9 stone 7 pounds, or 60.33 kg. Nine stone 5 pounds is 59.42 kg.

The two are easy to mix up because we are used to decimals that work in tens. A stone has 14 pounds, so half of one is 7 pounds. The gap between 9.5 stone and 9 stone 5 is 0.91 kg, close to a full kilogram. When you type your weight into an app or a search box, enter the stone and the pounds separately if you can.

Is 9 stone 57 kg?

Very nearly. Nine stone is 57.15 kg, so 57 kg is the correct whole number. Going the other way, 57 kg is 8 stone 13.7 pounds, which is a third of a pound under 9 stone.

Other round figures close by:

• 55 kg is 8 stone 9.3 pounds
• 56 kg is 8 stone 11.5 pounds
• 58 kg is 9 stone 1.9 pounds
• 60 kg is 9 stone 6.3 pounds

If a form asks for whole kilograms, write 57. If it takes one decimal place, write 57.2.

Is 9 stone a healthy weight for your height?

For most adults, 9 stone is a healthy weight if you are between about 5 feet and 5 feet 9 tall. In that range, 57.15 kg gives a body mass index from 18.5 to 24.9.

BMI is weight in kilograms divided by height in metres squared. Here is the result for 9 stone at different heights:

Height	BMI at 9 stone	Range
150 cm (4 ft 11)	25.4	Overweight
155 cm (5 ft 1)	23.8	Healthy
160 cm (5 ft 3)	22.3	Healthy
165 cm (5 ft 5)	21.0	Healthy
170 cm (5 ft 7)	19.8	Healthy
175 cm (5 ft 9)	18.7	Healthy
180 cm (5 ft 11)	17.6	Underweight
185 cm (6 ft 1)	16.7	Underweight

These ranges are for adults only. Children and teenagers are assessed with growth charts that take age and sex into account, so a 9 stone teenager cannot be judged from this table. The figures do not apply during pregnancy either.

What if 9 stone is underweight for your height?

If you are taller than about 5 feet 9, a weight of 9 stone gives a BMI under 18.5, which is classed as underweight. This is worth taking seriously, in the same way as being overweight.

At 5 feet 11, the bottom of the healthy range is about 59.9 kg. Nine stone is 2.8 kg below that. At 6 feet 1, the healthy range starts at 63.3 kg, so 9 stone is around 6 kg below.

Being underweight can affect energy levels, bone strength and the immune system. Some people are naturally slim and perfectly well, but if your weight has dropped without you trying, or you feel tired or unwell, see your GP. They can check for causes and suggest safe ways to reach a healthy weight.

How does 9 stone compare with the average woman in England?

Nine stone is well below the average. National health survey figures put the average woman in England at around 72 kg, which is roughly 11 stone 5.

That is a gap of about 15 kg, or 2 stone 5 pounds. The average man weighs around 85 kg, which is about 28 kg more than 9 stone.

These averages include a large share of adults who are above the healthy BMI range, so they are not a guide to what you should weigh. Your height tells you far more than a national figure does.

Where does 9 stone turn up in sport?

Nine stone is the upper limit for featherweight boxers. The class stops at 126 pounds, which is 57.15 kg.

Amateur and Olympic boxing use metric classes, and one of them is 57 kg, almost the same weight. Horse racing is another place you will hear it. Jockeys on the flat often ride at around 8 to 9 stone, and racecards in Britain still show these weights in stone and pounds.

For anyone training for a weigh-in, the lesson is the same. Convert once, use the exact kilogram figure, and check it on the official scales.

How heavy is 9 stone in everyday terms?

Nine stone is about the weight of 57 one-litre bottles of water, because a litre of water weighs a kilogram.

A few other ways to picture it:

• Just under two and a half suitcases packed to a 23 kg airline limit.
• A little more than two 25 kg bags of cement.
• More than half of 100 kg, with 7 kg to spare.

What does 9 stone mean in the gym?

At 9 stone, lifting your own body weight means lifting about 57.5 kg. Gym plates are marked in kilograms, so it helps to know how to load that.

On a standard 20 kg bar, add a 15 kg plate, a 2.5 kg plate and a 1.25 kg plate to each side. That comes to 57.5 kg. Exercises such as pull-ups and dips also move your full body weight, so each one is a 57 kg lift. Treadmills and rowing machines ask for your weight in kilograms to estimate the calories you burn, and typing 57 is close enough for that.

How far is 9 stone from nearby weights in kg?

Each half stone is 3.18 kg. This table shows the weights on either side of 9 stone.

Weight	Kilograms	Difference from 9 stone
8 st	50.80 kg	6.35 kg lighter
8 st 7 lb	53.98 kg	3.18 kg lighter
9 st 7 lb	60.33 kg	3.18 kg heavier
10 st	63.50 kg	6.35 kg heavier
11 st	69.85 kg	12.70 kg heavier

Whether a change in either direction is a good idea depends on your height and health. Check the BMI table above, and talk to your GP before making a large change to your weight.

What is 9 stone in pounds, ounces and grams?

Nine stone is 126 pounds, 2,016 ounces or 57,153 grams.

Unit	9 stone equals
Kilograms	57.15 kg
Grams	57,153 g
Pounds	126 lb
Ounces	2,016 oz

Use the pounds figure for friends or forms in the United States, where nobody uses stone. Use kilograms for doctors, gyms and most other countries.

When might you need 9 stone in kg?

You will need it whenever a form, a machine or an app asks for metric weight.

Examples include a hospital pre-assessment, a gym induction, and the set-up screen on a fitness watch or a calorie-counting app. Blood donation is another. Donors in England must weigh at least 50 kg, which is 7 stone 12 pounds, so someone who weighs 9 stone is above the minimum. Travel is a third case, since light aircraft and helicopter tours often ask for each passenger’s weight in kilograms.

Frequently asked questions

How many pounds is 9 stone?

Nine stone is 126 pounds.

What is 9 stone 7 in kg?

9 stone 7 pounds is 60.33 kg.

What is 9 stone 4 in kg?

9 stone 4 pounds is 58.97 kg.

What is 9 stone 2 in kg?

9 stone 2 pounds is 58.06 kg.

What is 9 stone 10 in kg?

9 stone 10 pounds is 61.69 kg.

How do I convert 9 stone to kg in my head?

Multiply 9 by 6 to get 54, then add a third of 9, which is 3. The total is 57 kg, only 150 grams under the exact figure.

Is 9 stone to kg the same for everyone?

Yes. The conversion only changes the unit. Whether 9 stone is a healthy weight depends on your height, age and build.

What is 57.15 kg in stone?

57.15 kg is 9 stone.

What is the short answer?

Nine stone equals 57.15 kg, or 126 pounds. Add 0.45 kg for every extra pound. For other weights, use the stone to kg converter or the chart on this site.