Weight Converter
Convert between weight and mass units instantly. Transform pounds to kilograms, ounces to grams, and more. Essential for cooking, shipping, fitness, and international measurements.
Reviewed by the SparkCalc editorial team
How We Calculate This
All conversions use grams as the base unit. 1 oz = 28.3495 g, 1 lb = 453.592 g, 1 kg = 1000 g, 1 stone = 6350.29 g, 1 ton = 907185 g, 1 tonne = 1000000 g.
Sources: BIPM — The kilogram (SI base unit of mass) · NIST — Guide to the SI, Appendix B.8: Factors for Units Listed Alphabetically · NIST Office of Weights and Measures — Unit Conversion
Frequently Asked Questions
How many pounds are in a kilogram?
1 kilogram equals approximately 2.205 pounds. Conversely, 1 pound equals about 0.4536 kilograms.
How do I convert ounces to grams?
Multiply ounces by 28.35 to get grams. For example, 4 oz = 4 × 28.35 = 113.4 grams.
What is a stone in pounds?
1 stone equals 14 pounds. Stones are commonly used in the UK and Ireland to measure body weight.
What is the difference between a ton and a tonne?
A US ton (short ton) is 2,000 pounds. A metric tonne is 1,000 kilograms (about 2,205 pounds). A UK ton (long ton) is 2,240 pounds.
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