Weight Converter
Convert kilograms, pounds, ounces, grams, and tons.
This weight converter (a weight conversion calculator) converts between kilograms, pounds, ounces, grams, stone, and tons using precise, fixed conversion factors. It handles g to kilograms and every other common weight conversion in one tool.
Select your source and target weight units, enter a value, and the converter returns the result instantly.
Worked Calculation Examples
| Scenario | Result | Calculation Step |
|---|---|---|
| 75 kg to pounds | ≈165.35 lbs | 75 × 2.20462 ≈ 165.35 lbs. |
| 10 pounds to kilograms | ≈4.54 kg | 10 ÷ 2.20462 ≈ 4.54 kg. |
How to Calculate Weight Conversions
Every weight conversion multiplies the source value by a fixed factor - 1 kilogram equals exactly 2.20462 pounds, and 1 pound equals exactly 16 ounces. Unlike currency exchange rates, these weight conversion factors never change.
Metric vs. Imperial Weight Units
The metric system (grams, kilograms) is used almost universally in science and most countries worldwide, while pounds, ounces, and stone remain common in the U.S. and, for stone specifically, the UK - this converter bridges both systems in either direction.
How to Use the Weight Converter
- Open the Weight Converter and enter the values requested in the input fields.
- Check the units, percentages, dates, or time periods before reading the answer.
- Review the instant result and adjust any value to compare another scenario.
- Use the formula, example, and FAQs below to understand how the weight converter works.
Frequently Asked Questions
How do I calculate weight conversion from kg to lbs?
Multiply the weight in kilograms by 2.20462 to get the equivalent in pounds.
How many grams are in a kilogram?
There are exactly 1,000 grams in a kilogram (g to kilograms conversion factor of 1,000).
What is a stone in weight conversion terms?
A stone is a British and Irish unit equal to 14 pounds, commonly used for body weight in the UK and Ireland.
How do I use this weight converter?
Enter the known values, review the units or settings, and the calculator updates the result instantly. The formula and example on this page show how the answer is produced.
What does the Weight Converter calculate?
Convert kilograms, pounds, ounces, grams, and tons. It is designed for fast browser-based calculations without sign-up, downloads, or manual spreadsheet setup.
What formula does this weight use?
The formula is: target = source * conversion factor. The kilogram was, until 2019, the last SI base unit still defined by a physical object - a specific platinum-iridium cylinder kept in France since 1889 - before international metrology bodies redefined it in terms of Planck's constant, a fixed fundamental physical quantity, eliminating any risk of the standard itself changing slightly over time due to physical wear or contamination.
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Last updated: September 27, 2026.