Unit Converters

Weight Converter (Kg, Stone, Pounds & Ounces)

Convert kg to stone, pounds and ounces instantly — with a stone-and-pounds readout. Type any value and every field updates at once. 70 kg = 11 st 0.3 lb.

Type any weight above — for example 70 kg — and every other unit updates instantly. 70 kg converts to 11.02 stone, 11 st 0.3 lb, 154.32 lb and 2,469 ounces.
Key Takeaways

How do you convert kg to stone?

Multiply kilograms by 0.157473 to get stone, or divide by 6.35029 — a stone is 6.35029 kg, which is exactly 14 pounds. So 70 kg × 0.157473 = 11.02 stone, and 88.9 kg = 14.00 stone. Because a stone is heavier than a kilogram, the same weight is always a smaller number in stone than in kilograms. The converter above does this the instant you type, and also splits the result into whole stone and leftover pounds so you do not have to.

To read a weight as stone and pounds, take the whole-number part as your stone, then multiply the leftover decimal by 14 for the pounds. For example, 70 kg is 11.02 stone: the 11 is your stone, and 0.02 × 14 ≈ 0.3 lb, giving 11 st 0.3 lb. The stone-and-pounds field on the converter shows this split automatically.

Kg to stone and pounds — full conversion table

These are the kg-to-stone conversions people look up most, from 60 kg up to 100 kg. Every figure below is produced by the converter at the top of the page — type the kilograms value into the Kilograms field to reproduce any row exactly, including the stone-and-pounds split.

KilogramsStoneStone + lbPounds
60 kg9.45 st9 st 6.3 lb132.3 lb
65 kg10.24 st10 st 3.3 lb143.3 lb
70 kg11.02 st11 st 0.3 lb154.3 lb
75 kg11.81 st11 st 11.3 lb165.3 lb
80 kg12.60 st12 st 8.4 lb176.4 lb
88.9 kg14.00 st14 st 0.0 lb196.0 lb
90 kg14.17 st14 st 2.4 lb198.4 lb
95 kg14.96 st14 st 13.4 lb209.4 lb
100 kg15.75 st15 st 10.5 lb220.5 lb

88.9 kg is the exact weight at which the scale reads a round 14 st 0.0 lb (196.0 lb), which is why "88.9 kg in stone" is such a frequently searched figure. The nearby 90 kg reads 14 st 2.4 lb, and 95 kg reads 14 st 13.4 lb — just short of 15 stone.

How do you convert stone to kg?

Multiply stone by 6.35029 to get kilograms; if you also have pounds, add lb × 0.453592. So 11 stone is 69.85 kg, and 11 st 6 lb is 72.57 kg (11 × 6.35029 + 6 × 0.453592). If you are starting from a stone-and-pounds reading, the easiest route is to turn it into total pounds first — stone × 14 + pounds — then multiply by 0.453592. For example, 11 st 6 lb is 160 lb, and 160 × 0.453592 = 72.57 kg.

StoneKilogramsPounds
10 st63.50 kg140 lb
11 st69.85 kg154 lb
12 st76.20 kg168 lb
13 st82.55 kg182 lb
14 st88.90 kg196 lb

Kilograms, stone, pounds and ounces explained

The kilogram (kg) is the SI base unit of mass and the unit the UK uses for most trade, food and medicine. The stone (st) is a British imperial unit of exactly 14 pounds (6.35029 kg), used almost solely in the UK and Ireland for personal body weight. The pound (lb) is 0.453592 kg and divides into 16 ounces (oz) of 28.3495 g each. Grams and milligrams sit below them on the metric side, and the metric tonne above at 1,000 kg.

Ounces are where imperial cooking measures live: 16 oz make a pound (453.6 g), which is why recipes often round a pound of flour to 450 g. If you are converting cups, pints and fluid ounces rather than dry weight, use the volume converter. For distances and heights, the length converter handles metres, feet and inches the same live way.

Why the UK still weighs in stone

The UK keeps the stone (14 lb) for personal weight out of long habit, even though it uses kilograms for almost everything else and prices food in metric. Bathroom scales, doctors' surgeries and slimming groups still quote stone and pounds, so most people in Britain know their weight that way first and the metric figure second. That split is exactly why "kg to stone" — and specific targets like 88.9 kg in stone — remain among the most-searched conversions in the country.

For a named worked example you can check against the tool: type 88.9 into the Kilograms field and the converter returns 14 stone, a stone-and-pounds readout of 14 st 0 lb, 195.99 lb, 3135.86 oz and 88,900 g — the same round 14 stone used throughout this page. Type 70 instead and it returns 11.02 stone, 11 st 0.3 lb and 154.32 lb, matching the table above.

Unit converters

Weighing in three systems: stones, pounds and kilograms in UK life

By CalculatorDashboard Editorial Team·Updated ·Reviewed ·3 min read

In everyday speech, weight usually means mass, and in the UK it's described in three overlapping systems. Shops and the NHS use kilograms. Many adults think of their own weight in stones and pounds. And some packaging, gyms and American sources use pounds alone. One stone is 14 pounds, and since 1959 a pound has been exactly 0.45359237 kilograms, so a stone is about 6.35 kilograms.

Healthcare and babies

The NHS records adult weight in kilograms, and Body Mass Index is calculated from kilograms and metres: your weight in kilograms divided by the square of your height in metres. If you know your weight in stones and pounds, convert to kilograms before using a BMI formula, or use a calculator that does it for you.

Babies are a special case. Hospitals weigh newborns in grams, but many parents and relatives still ask for the weight in pounds and ounces. A baby weighing 3.4 kilograms is about 7 pounds 8 ounces, or more precisely 7 lb 7.9 oz. Because the difference between 7 lb 7 oz and 7 lb 8 oz is only about 28 grams, a rounded figure is perfectly fine for announcements, but health visitors track growth in grams.

Rounding pitfalls

The common mistake is converting kilograms to stones and treating the decimal part as pounds. 70 kilograms is about 11.02 stone, which is 11 stone and about 0.3 pounds, not 11 stone 2 pounds. To convert properly, multiply the decimal part of the stones figure by 14 to get pounds. The converter above does this automatically and shows stones and pounds separately.

Worked conversions

An adult weighing 12 stone 6 pounds weighs 174 pounds, about 78.9 kilograms. A 20 kg suitcase is about 44 pounds, or 3 stone 2 pounds. And losing 5 kilograms is a loss of about 11 pounds, a little over three-quarters of a stone.

Weighing yourself consistently

Body weight naturally varies by a kilogram or more over a day, depending on food, drink and time of day. For tracking changes, weigh at the same time each day, ideally in the morning before eating, on the same scales, and look at the trend over weeks rather than daily readings. Scales measure weight in kilograms or stones based on their calibration, and different scales can disagree by a kilogram or two, so switching between them can look like a change that hasn't happened.

Checking your answer

A stone is about 6.35 kilograms, so 10 stone is about 63.5 kg and 15 stone about 95 kg. A kilogram is about 2.2 pounds. For a quick mental conversion from kilograms to stones, divide by 6.35, or roughly by six and a third. If a converted adult weight comes out at a few stone, or several hundred kilograms, check whether pounds were entered as kilograms.

One more worked example

A gym session uses a 20 kg barbell with two 15 kg plates, a total of 50 kg, about 110 pounds. Many American training programmes give weights in pounds, so a programme asking for 135 pounds, a common bar-plus-one-plate load in US gyms, means about 61 kilograms. In a UK gym with metric plates, the nearest practical load is usually 60 kilograms.

Weights on medical forms

Prescriptions for some medicines, especially for children, are calculated per kilogram of body weight, so an accurate kilogram figure matters. If you only know a weight in stones and pounds, convert it carefully rather than estimating, and tell the pharmacist or clinician if the weight is recent or a guess. A child weighing 3 stone 2 pounds weighs 44 pounds, about 20 kilograms, which is the figure a dosing chart will use.

Weight conversion FAQs

How many stone is 1 kg?

One kilogram is 0.157473 stone. To convert kg to stone, multiply by 0.157473 or divide by 6.35029. So 10 kg is 1.57 stone and 70 kg is 11.02 stone. Because a stone is 6.35029 kg, the same weight is always a smaller number in stone than in kilograms.

How do you convert kg to stone and pounds?

Divide the kilograms by 6.35029 to get total stone. The whole number is your stone; multiply the leftover decimal by 14 to get the pounds. Example: 80 kg ÷ 6.35029 = 12.60 stone, so 12 stone, and 0.60 × 14 ≈ 8.4 lb — giving 80 kg ≈ 12 st 8 lb.

What is 88.9 kg in stone?

88.9 kg is 14.0 stone — that is 14 stone 0 pounds, or 196.0 lb. Multiply 88.9 by 0.157473 for stone, or by 2.20462 for pounds. As a check, 14 stone × 6.35029 = 88.9 kg.

How many kg is 1 stone?

One stone equals 6.35029 kg. To convert stone to kilograms, multiply by 6.35029; if you also have pounds, add lb × 0.453592. For example, 11 stone is 69.85 kg, and 11 st 6 lb is 72.57 kg.

Why does the UK use stone for body weight?

The UK keeps stone (14 lb) for personal weight out of long habit, even though it uses kilograms for most measures and prices food in metric. Scales, doctors and slimming groups still quote stone and pounds, which is why kg-to-stone remains one of the most-searched conversions in Britain.

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