Weight Converter (kg, lb, oz, g)
Convert between kilograms, pounds, ounces, grams, stone, milligrams and tons instantly
Last updated: November 2, 2026
How to Use the Weight Converter (kg, lb, oz, g)
How to convert weight
- Enter the amount you want to convert.
- Choose the unit it is currently in from the From list.
- Read the results. Every other unit is shown at once, with the most common conversion first.
You can change the value or the unit at any time and the results update instantly. Results show up to six decimal places, with trailing zeros removed.
Formula & Methodology
Weight conversion factors
Every conversion goes through kilograms. Multiply by the factor to convert to kilograms, and divide by it to convert from kilograms.
| Unit | Equals (in kg) | |---|---| | 1 pound (lb) | 0.45359237 kg | | 1 ounce (oz) | 0.0283495 kg (28.3495 g) | | 1 gram (g) | 0.001 kg | | 1 milligram (mg) | 0.000001 kg | | 1 stone (st) | 6.35029 kg (14 lb) | | 1 metric ton (tonne) | 1,000 kg | | 1 US ton (short ton) | 907.185 kg (2,000 lb) |
The most common conversions
Kilograms to pounds: lb = kg × 2.20462
Pounds to kilograms: kg = lb × 0.453592
Grams to ounces: oz = g ÷ 28.3495
Worked examples
- 70 kg in pounds: 70 × 2.20462 = 154.32 lb
- 150 lb in kilograms: 150 × 0.453592 = 68.04 kg
- 11 stone in kilograms: 11 × 6.35029 = 69.85 kg
- 500 g in ounces: 500 ÷ 28.3495 = 17.64 oz
Weight or mass?
Strictly, kilograms and pounds measure mass, while weight is the force of gravity on that mass. In everyday use, and on any scale you step on, the two words are used interchangeably, and these conversions are the ones you need.
About Weight Converter (kg, lb, oz, g)
Our weight converter (kg, lb, oz, g) is a free, easy-to-use tool designed to help youconvert between kilograms, pounds, ounces, grams, stone, milligrams and tons instantly. For professionals or those who need quick calculations, our calculator provides accurate results instantly.
Frequently Asked Questions
How do I convert kilograms to pounds?
Multiply the kilograms by 2.20462. For example, 70 kg × 2.20462 = 154.32 lb. As a quick estimate, double the kilograms and add 10%.
How do I convert pounds to kilograms?
Multiply the pounds by 0.453592, or divide by 2.20462. A weight of 150 lb is 150 × 0.453592 = 68.04 kg. A quick estimate is to halve the pounds and subtract about 10%.
How many ounces are in a pound?
There are 16 ounces in a pound. One ounce is about 28.35 grams, so a pound is about 453.6 grams.
How many pounds are in a stone?
A stone is 14 pounds, which is about 6.35 kilograms. Stones are mostly used for body weight in the UK and Ireland, so 11 stone is 154 lb or about 69.9 kg.
What is the difference between a metric ton and a US ton?
A metric ton (tonne) is 1,000 kg, about 2,204.6 lb. A US ton (short ton) is 2,000 lb, about 907.2 kg. The two differ by roughly 10%, so check which one a quote or document means.
How many grams are in a kilogram?
There are 1,000 grams in a kilogram, and 1,000 milligrams in a gram, so a kilogram is 1,000,000 milligrams.
Are the conversions exact?
The pound is defined as exactly 0.45359237 kg, so conversions between metric and pounds are exact up to the precision shown. Results are displayed to six decimal places.
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