100% free · Runs 100% in your browser · kg, g, lb, oz, stone & tonne · No signup needed
Conversion factors: 1 kg = 2.20462 lb; 1 lb = 16 oz; 1 stone = 14 lb; 1 tonne = 1,000 kg. Displayed values are rounded — the full-precision value is used for the next conversion, not the rounded display. Stone is a UK unit, rarely used outside the UK, and is never mixed into the metric default here.
Try an example: 70 kg · Try an example: 10 stone
| From | Equals |
|---|---|
| 1 kg | 2.20462 lb · 35.274 oz · 1,000 g |
| 1 lb | 0.453592 kg · 16 oz |
| 1 oz | 28.3495 g · 0.0625 lb |
| 1 stone (UK) | 14 lb · 6.35029 kg |
| 1 tonne | 1,000 kg · 2,204.62 lb |
| 70 kg | 154.32 lb · 11.02 stone |
| 10 stone | 140 lb · 63.50 kg |
Weight is the measurement that follows you everywhere, from the bathroom scales to the luggage check-in, the gym to the kitchen, and the post office to the doctor's surgery. It is also a measurement split between two systems, because most of the world weighs in kilograms and grams while the United States weighs in pounds and ounces and the United Kingdom still uses stones. The Weight Converter from FistHost ends that split in one click: type a weight in any unit, and it instantly shows the same weight in kilograms, grams, pounds, ounces, stones and tonnes, so you never have to guess or reach for a calculator again.
The confusion is real because the units look similar but are not. A kilogram is a little more than two pounds, a pound is sixteen ounces, and a stone is fourteen pounds, so a small mistake in the factor becomes a big mistake in the answer. This converter uses the exact standard factors, shows the result two ways at once, and includes a table of common values, so you can check a conversion in seconds and trust it.
The converter is a single-purpose tool, which is exactly what makes it fast. You enter a value, pick the unit it is in, and the tool converts it to every other unit instantly, in both directions. There is no second form to fill in, no button to press and no page to reload. Change the value and every result updates at once, so you can test a whole range of numbers in a few seconds, for example a set of luggage weights, a list of ingredients, or the weights on a gym programme.
Behind the scenes, every conversion goes through kilograms, which is the base unit of mass in the metric system. The tool first converts your value into kilograms, then converts those kilograms into each of the other units. That single-step-through-kilograms design keeps every conversion consistent, so converting kilograms to pounds and back again returns the same number you started with, apart from rounding. The factors are the standard ones used in science, trade and medicine, so the answers match the ones a pharmacist, a shipping company or a textbook would give.
The metric units are built on thousands, which is why they are easy to work with. One tonne is 1,000 kg, one kilogram is 1,000 grams, and one gram is 1,000 milligrams. A gram is the unit for small ingredients, spices and letters. A kilogram is the everyday unit for body weight, food shopping and luggage. A tonne is the unit for vehicles, building materials and freight, where kilograms would run into five figures.
The imperial units come from older measures, and their factors are exact by definition. One pound is 16 oz, one stone is 14 lb, and one pound is 453.59237 grams exactly, which is the definition that ties the two systems together. The key conversions to remember are 1 kg = 2.20462 lb, 1 lb = 16 oz, 1 stone = 14 lb, and 1 tonne = 1,000 kg. Those four factors cover almost every weight conversion you will ever need, from a parcel to a person to a pallet of goods, and the converter applies them exactly, every time.
Here is the worked check the converter is built around, so you can follow the maths yourself. Take 70 kg and convert it to pounds. The factor is 1 kg = 2.20462 lb, so the calculation is 70 x 2.20462 = 154.3234 lb, which the tool shows as 154.32 lb. That is the whole check: multiply the kilograms by 2.20462, and the answer is the weight in pounds. A person who weighs 70 kg weighs about 154 lb, and a suitcase that weighs 23 kg weighs about 50.7 lb.
Now take 10 stone and convert it to pounds and kilograms. The factor is 1 stone = 14 lb, so the calculation is 10 x 14 = 140 lb. That is the first step, and it is exact, because stones and pounds are both imperial units. Then convert those 140 lb to kilograms: 140 / 2.20462 = 63.5029 kg, which the tool shows as 63.50 kg. So 10 stone = 140 lb = 63.50 kg, and you can check it the other way too: 63.50 kg x 2.20462 = 139.99 lb, which is 140 lb apart from rounding.
Your result shows the converted weight in every unit at once, so you can read the one you need without converting again. The main result is shown in large type, and the full table below it lists the same weight in kilograms, grams, pounds, ounces, stones and tonnes. That table is useful when you are comparing two things in different units, for example a European recipe that gives an ingredient in grams and an American recipe that gives it in ounces, or a gym programme in kilograms and a set of dumbbells labelled in pounds.
Travel is the most common use. Airlines quote luggage limits in kilograms in most of the world and in pounds in the United States, so a bag that is 23 kg is 50.7 lb, and a bag that is 50 lb is 22.68 kg. Going over the limit by a single kilogram can cost more than the flight itself in excess baggage fees, so checking before you leave home is worth a minute. Hand luggage limits are tighter still, often 7 kg or 10 kg, which is about 15.4 lb or 22 lb, and the converter lets you check both before you pack.
Here is the honest label. Stone is a UK unit rarely used elsewhere, so the tool labels it clearly and never mixes it into the metric default. If you enter a weight in kilograms, the main result is shown in pounds and the stone figure appears in the table, clearly labelled as stones and pounds, for example 11 st 0 lb for 70 kg. It is never shown as a bare number that could be mistaken for kilograms or pounds, and the metric result is always the first one you see, because most of the world thinks in kilograms first.
Weight is often one number in a bigger health picture, and the same free calculators can fill in the rest of it. If you want to know what your weight means for your health, the BMI calculator works out your body mass index from your height and weight, so you can see your weight in context instead of alone. If you need to convert a height or a distance to go with it, the length converter converts metres, feet, miles and inches instantly, two ways. And if your weight is in another kind of unit altogether, from temperature to volume to speed, the unit converter covers the full range in one place.
FistHost believes useful tools should be free, fast and honest, with no sign-up and no download standing between you and the answer, and the Weight Converter runs entirely in your browser, so your numbers are never sent to a server. If this converter saved you an excess baggage fee or a ruined recipe, the same practical thinking applies to getting your ideas online, because FistHost shared hosting starts from $0.99/month and an annual plan includes a free domain, so you can launch a blog, a portfolio or a small business website for less than the cost of a coffee each month, all from fisthost.com.
Getting online should be as simple as using this converter, and with FistHost it is: fast, reliable shared hosting from $0.99/month, friendly support, and a free domain with the annual plan, so your first website costs almost nothing to start and nothing extra for the domain name in the first year. Whether you are sharing a project, selling a product or writing about what you love, FistHost shared hosting with a free domain on the annual plan is the simplest way to turn a plan into something real on the internet.
How many pounds is 70 kg? 70 kg = 154.32 lb, because 1 kg = 2.20462 lb, so 70 x 2.20462 = 154.3234 lb.
How many pounds and kilograms is 10 stone? 10 stone = 140 lb = 63.50 kg, because 1 stone = 14 lb, and 140 / 2.20462 = 63.5029 kg.
Why is stone shown separately? Because stone is a UK unit rarely used elsewhere, so the tool labels it clearly and never mixes it into the metric default.
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