Weight Calculator
Convert between common weight units like kilogram, pound, ounce, and more
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Weight Calculator
Convert between common weight units and learn about weight and its history.
🧮 Weight Conversion
📊 Result
Converted Value
1 pound = 0.45359237 kilogram
📚 Common Weight and Background
Selected Weights
- Milky Way Galaxy — 1.15357 × 10^42 kg or 5.8 × 10^11 solar mass
- Sun — 1.9891 × 10^30 kg
- Earth — 5.9736 × 10^24 kg
- Moon — 7.3477 × 10^22 kg
- Atomic Mass Unit (u) — 1.66053906660 × 10^-27 kg
- Neutron — 1.67492749804 × 10^-27 kg or 1.00866491595 u
- Proton — 1.67262192369 × 10^-27 kg or 1.007276466621 u
- Electron — 9.1093837015 × 10^-31 kg or 5.48579909070 × 10^-4 u
Why We Have Different Ways to Measure Weight?
Early civilizations used seeds and stones as standards. The carat used in gems derives from the carob seed.
Babylonians defined the talent as a base unit. Greeks adopted similar measures, while Romans used the uncia, the origin of the words ounce and inch.
British Imperial units continued this lineage and were codified in the Weights and Measures Act of 1824.
The metric system, created in 18th-century France, defined the kilogram as the mass of a liter of water and standardized using base-10 multiples, making conversions straightforward.
- 1 milliliter = 1 cubic centimeter
- Mass of 1 milliliter of water ≈ 1 gram
- Mass of 1 liter of water ≈ 1 kilogram
- 1 cubic meter of water ≈ 1000 kilograms = 1 metric ton