Weight Converter
kg, grams, pounds, ounces and stone.
Convert a weight
Type a number and pick two units. The answer updates as you type.
Pounds and ounces
Handy for baby weights and recipes from overseas. Ounces are rounded to one decimal place.
2.5 kg = 5 lb 8.2 oz
5 lb 8 oz = 2.494758035 kg (2,494.758035 g)
Stone and pounds
Body weight in the UK and Ireland. One stone is 14 pounds. Pounds are rounded to one decimal place.
80 kg = 12 st 8.4 lb
11 st 4 lb = 71.66759446 kg (71,667.59446 g)
2.5 kg equals
5.511556555 lb
Formula: kilograms × 2.20462 = pounds
In pounds and ounces: 5 lb 8.2 oz
In stone and pounds: 0 st 5.5 lb
Every unit at once
| Unit | Value | Copy |
|---|---|---|
| Kilograms (kg) | 2.5 | |
| Grams (g) | 2,500 | |
| Milligrams (mg) | 2,500,000 | |
| Tonnes (metric) (t) | 0.0025 | |
| Pounds (lb) | 5.511556555 | |
| Ounces (oz) | 88.18490487 | |
| Stone (st) | 0.393682611 | |
| US short tons (US ton) | 0.002755778277 | |
| Long tons (UK) (long ton) | 0.002460516319 | |
| Carats (ct) | 12,500 |
| Weight | Equals | Also written as |
|---|---|---|
| 2.5 kg | 5.511556555 lb | 5 lb 8.2 oz |
| 3.5 kg | 7.716179176 lb | 7 lb 11.5 oz |
| 1 kg | 2.204622622 lb | 2 lb 3.3 oz |
| 5 kg | 11.02311311 lb | 11 lb 0.4 oz |
| 10 kg | 22.04622622 lb | 22 lb 0.7 oz |
| 20 kg | 44.09245244 lb | 44 lb 1.5 oz |
| 50 kg | 110.2311311 lb | 110 lb 3.7 oz |
| 70 kg | 11.02311311 st | 11 st 0.3 lb |
| 80 kg | 12.59784355 st | 12 st 8.4 lb |
| 100 kg | 220.4622622 lb | 220 lb 7.4 oz |
| 500 g | 1.102311311 lb | 1 lb 1.6 oz |
| 100 g | 3.527396195 oz | - |
| 1 lb | 0.45359237 kg | - |
| 1 oz | 28.34952313 g | - |
| 1 st | 6.35029318 kg | - |
| 1 t | 1.102311311 US ton | - |
| 1 ct | 200 mg | - |
How to Use the Weight Converter
Type a number, choose the unit you have and the unit you want, and the weight conversion appears as you type. The converter covers kilograms, grams, milligrams, tonnes, pounds, ounces, stone, US short tons, long tons and carats, and a table underneath shows your weight in all of them at once. Two extra panels turn kilograms into pounds and ounces (such as 5 lb 8.2 oz) or stone and pounds (such as 12 st 8.4 lb), and back again.
Australia uses metric, so scales, labels and medical records are in kilograms and grams. Recipes, baby weights and product listings from overseas often use pounds and ounces, and body weight in the UK and Ireland is still given in stone and pounds. That is where a weight conversion calculator earns its keep.
Weight Conversion Formulas
Kilograms per unit: 1 g = 0.001, 1 tonne = 1,000, 1 lb = 0.45359237, 1 oz = 1/16 lb, 1 stone = 14 lb, 1 US short ton = 2,000 lb, 1 long ton = 2,240 lb, 1 carat = 0.0002. All are exact.
Pounds and ounces = whole pounds + the remaining ounces (16 oz per lb), ounces to one decimal place
Stone and pounds = whole stone + the remaining pounds (14 lb per stone), pounds to one decimal place
Worked Examples
2.5 kg to pounds. Dividing by 0.45359237 gives 5.511556555 lb (about 5.51 lb). To split that into pounds and ounces, keep the 5 whole pounds and multiply the leftover 0.5116 lb by 16, which is about 8.2 oz. So 2.5 kg is 5 lb 8.2 oz.
11 st 4 lb to kilograms. Eleven stone is 11 × 14 = 154 lb, plus 4 lb makes 158 lb. Multiplying by 0.45359237 gives 71.66759446 kg (about 71.67 kg).
Common Weight Conversions
These are the conversions people look up most, calculated by the same code as the converter above.
| Weight | Equals | Also written as |
|---|---|---|
| 2.5 kg | 5.511556555 lb | 5 lb 8.2 oz |
| 3.5 kg | 7.716179176 lb | 7 lb 11.5 oz |
| 1 kg | 2.204622622 lb | 2 lb 3.3 oz |
| 5 kg | 11.02311311 lb | 11 lb 0.4 oz |
| 10 kg | 22.04622622 lb | 22 lb 0.7 oz |
| 20 kg | 44.09245244 lb | 44 lb 1.5 oz |
| 50 kg | 110.2311311 lb | 110 lb 3.7 oz |
| 70 kg | 11.02311311 st | 11 st 0.3 lb |
| 80 kg | 12.59784355 st | 12 st 8.4 lb |
| 100 kg | 220.4622622 lb | 220 lb 7.4 oz |
| 500 g | 1.102311311 lb | 1 lb 1.6 oz |
| 100 g | 3.527396195 oz | - |
| 1 lb | 0.45359237 kg | - |
| 1 oz | 28.34952313 g | - |
| 1 st | 6.35029318 kg | - |
| 1 t | 1.102311311 US ton | - |
| 1 ct | 200 mg | - |
Tonnes, Tons and Other Big Units
The metric tonne is 1,000 kg. The US short ton is 2,000 lb and the UK long ton is 2,240 lb, so they are not the same thing: 1 tonne is 1.1023 US tons or 0.9842 long tons. Carats measure gemstones and are a metric unit of 0.2 g, which is not the same as the “karat” used for gold purity. A pound is also slightly different in jewellery and pharmacy history (troy and apothecary systems), but modern conversions, including this one, use the avoirdupois pound.
Frequently Asked Questions
- What is 2.5 kg in pounds and ounces?
- 2.5 kg is 5 lb 8.2 oz. In decimal pounds that is 5.511556555 lb (about 5.51 lb), and in ounces only it is 88.18490487 oz. The converter's pounds and ounces panel does this split for you and rounds the ounces to one decimal place.
- How does weight conversion work?
- Every unit is defined as a fixed number of kilograms, so converting is a single multiplication and division. One pound is exactly 0.45359237 kg, one ounce is 28.34952313 g, and one kilogram is 2.20462 lb. To go from kilograms to pounds, multiply by 2.20462; to go back, multiply pounds by 0.45359237. The formula for your current pair is shown under the answer.
- What does wt conversion mean?
- "wt" is short for weight, so a wt conversion is just a weight conversion: changing a figure from one unit to another, such as kg to lb or grams to ounces. On this page you type the number, choose the two units, and read the answer. The table below it shows the same weight in every unit at once.
- Is there a weight converter that shows every unit at once?
- Yes. As a unit converter for weight, it lists your amount in all 10 units together: kilograms, grams, milligrams, tonnes, pounds, ounces, stone, US short tons, long tons and carats. Each row has a copy button, and the decimal places setting changes the whole table. For 2.5 kg you will see 2,500 g, 5.512 lb, 88.18 oz and 0.394 st.
- Is this a weight exchange calculator?
- If by weight exchange you mean swapping a weight from one unit to another, yes. Use the swap button to flip kg to lb into lb to kg. There are no exchange rates involved: unlike currency, the relationship between a pound and a kilogram is fixed by definition, so the answer never changes from day to day.
- What is the difference between mass and weight?
- Strictly, mass is how much matter something contains (measured in kilograms) and weight is the force of gravity on that mass. Your mass is the same on the Moon, but you would weigh less there. In everyday life, including kitchen scales, bathroom scales and parcels, "weight" is used to mean mass, which is what this converter handles.
- Does Australia use kg or pounds?
- Australia is metric, so groceries, body weight, parcels and medical records use kilograms and grams. Pounds and ounces still appear in recipes, product listings and baby weights from overseas. For example, a newborn of 7 lb 8 oz weighs 3.40 kg (3.401942775 kg), and a 3.5 kg baby is 7 lb 11.5 oz.
- How do I convert stone and pounds to kilograms?
- Multiply the stone by 14, add the pounds, then multiply the total pounds by 0.45359237. For 11 st 4 lb that is 11 × 14 + 4 = 158 lb, which is 71.67 kg (71.66759446 kg). Going the other way, 80 kg is 176.3698097 lb, or 12 st 8.4 lb.
- Where can I find a weight calculator on this site?
- You are on it. The weight converter on Easy Calculator handles kilograms, grams, pounds, ounces, stone, tonnes and more, with panels for pounds and ounces and for stone and pounds. For other conversions, the length and area converters work the same way.