Weight / Mass Converter
Convert between units of weight and mass instantly with precise reference factors.
Reviewed October 7, 2026 Runs in your browser — inputs are never stored
1 Milligrams = 0.001 Grams
This tool provides general unit conversions for everyday and educational use. For regulated, legal, or scientific applications, verify conversion factors against the applicable official standard.
About the Weight / Mass Converter
The weight and mass converter switches between milligrams, grams, kilograms, ounces, pounds and tons. It converts through the kilogram using the exact international definition of the pound (0.45359237 kg), so a figure converted in one direction and back again returns the same value. It is handy for recipes, shipping weights, body weight and product labels from other countries.
How to use it
- 1Type the value you want to convert.
- 2Choose the unit you are converting from and the unit you want (for example kilograms to pounds).
- 3The result updates as you type; use the swap button to reverse the direction.
- 4Copy or share the result with the buttons below it.
Worked example
72 kg ÷ 0.45359237 = 158.73 lb. In the other direction, 2 lb = 0.907 kg, and 1 lb = 16 oz = 453.59 g.
How it works
How it works
Values are converted through a common base unit for accurate results.
Common use cases
- Converting body weight between kilograms and pounds
- Checking parcel weights for international shipping
- Following recipes written in ounces or grams
Frequently asked questions
A:Conversions use standard reference factors and display up to six significant digits.
A:Yes, use the swap button between the From and To selectors.
Reviewed for accuracy · Last updated October 7, 2026
Conversion factors are based on internationally defined SI units and standard metric/imperial equivalence tables.
CalcWisee Editorial Team
Calculator development and formula review
CalcWisee is an independent site founded by Ayman. Every calculator is built from a published formula or official definition, tested against hand-worked examples before it goes live, and corrected promptly when a reader reports an issue to ayman@calcwisee.com.
Expertise: Financial mathematics, Health and fitness formulas, Applied mathematics, Unit conversion standards
References & sources
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