How this weight converter works
Weight and mass are measured in two main systems: the metric system (milligrams, grams, kilograms and tonnes) and the imperial / US customary system (ounces, pounds and stone). To convert accurately between them, this tool turns whatever you type into a single base unit — grams — and then expresses that base value in every other unit. Converting through a base avoids the rounding errors that creep in when you chain conversions one after another.
The exact factors used are: 1 kg = 2.2046226218 lb, 1 lb = 16 oz = 453.59237 g, 1 stone = 14 lb = 6.35029 kg, and 1 metric tonne = 1000 kg. The most-searched pairing — kilograms to pounds — is highlighted at the top so you can read it at a glance.
Common conversions
| From | Equals |
|---|---|
| 1 kilogram (kg) | 2.20 pounds (lb) |
| 1 pound (lb) | 0.45 kilograms (kg) |
| 1 stone (st) | 6.35 kilograms (kg) |
| 1 ounce (oz) | 28.35 grams (g) |
Reference note: factors follow the international avoirdupois pound (0.45359237 kg, exact). Results are rounded for readability, so very small differences in the last decimal are normal.
Frequently asked questions
- How many pounds in a kilogram?
- One kilogram equals about 2.2046226218 pounds, usually rounded to 2.205 lb. So a 10 kg mass is roughly 22.05 lb.
- How do I convert kg to lbs?
- Multiply the number of kilograms by 2.2046226218 to get pounds. For example, 5 kg × 2.2046226218 ≈ 11.02 lb. This converter does it instantly the moment you type a value.
- How many grams in an ounce?
- One ounce equals exactly 28.349523125 grams, commonly rounded to 28.35 g. There are 16 ounces in one pound, and one pound is 453.59237 grams.
- What is a stone in pounds?
- One stone equals exactly 14 pounds, which is about 6.35029 kilograms. The stone is still widely used in the UK and Ireland to express body weight.
- How do I convert lbs to kg?
- Divide the number of pounds by 2.2046226218, or multiply by 0.45359237, to get kilograms. For example, 150 lb ÷ 2.2046226218 ≈ 68.04 kg.
- Is weight the same as mass?
- Strictly, mass is the amount of matter in an object while weight is the force gravity exerts on that mass. In everyday use the terms are used interchangeably, and units like kilograms, pounds and stone all measure mass.