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Weight and Mass Converter
Convert mass and weight measurements between kilograms, pounds, ounces, grams, and British stones.
About Mass vs. Weight
In physics, mass measures the absolute quantity of matter in an object, while weight represents the downward gravitational force acting on that mass.
International Conversion Standards
- 1 Kilogram: 2.2046226218 Pounds
- 1 Pound (avoirdupois): 16 Ounces = 453.59237 Grams
- 1 British Stone: 14 Pounds = 6.35029 Kilograms
Frequently Asked Questions
Does mass change on another planet?
No. Mass remains unchanged across the universe; an object's gravitational weight changes based on local planetary gravity.
What is the difference between troy ounces and avoirdupois ounces?
Precious metals (gold, silver) are weighed in Troy ounces (31.1035 g). Standard consumer goods use Avoirdupois ounces (28.3495 g).
Why do medical charts use kilograms?
Clinical pharmacology uses metric kilograms worldwide to eliminate dosing errors caused by fractional Imperial conversions.
How do you convert stones and pounds to kilograms?
Multiply stones by 14, add remaining pounds, then divide the total pounds by 2.20462.
How to use
Calculate in three steps
- 1Enter your valuesUse the fields above and check the units shown beside each input.
- 2Run the calculationSelect Calculate to refresh the result with your latest values.
- 3Review or shareCompare the result, reset the form, print it, or share this page.
Inputs
What you need
Weight / Mass AmountValue
Original UnitValue