Convert Weight

Mass is the amount of matter in an object and remains constant everywhere, measured in kilograms or grams. Weight is the gravitational force acting on that mass and varies with location, measured in newtons. In everyday usage, we often use 'weight' to refer to mass, and our converter handles these common weight/mass units.

Recipes vary by region and tradition. American recipes often use ounces and pounds, while European recipes typically use grams and kilograms. Professional baking prefers weight measurements (grams) over volume (cups) for consistency and accuracy, as ingredient density can vary.

For most cooking, accuracy to the nearest gram or half-ounce is sufficient. Baking requires more precision - within 1-2 grams for small amounts and within 5 grams for larger quantities. Professional baking often requires accuracy to the nearest gram or even tenth of a gram for critical ingredients like salt or leavening agents.

A metric ton (tonne) equals 1,000 kilograms or 2,204.62 pounds. A US ton (short ton) equals 2,000 pounds or 907.185 kilograms. There's also a long ton (imperial ton) equal to 2,240 pounds, primarily used in the UK. Always specify which ton you're using to avoid confusion.

Stone is primarily used in the UK for human body weight. 1 stone = 14 pounds = 6.35029 kilograms. To convert: stone to kg multiply by 6.35029, stone to pounds multiply by 14. For example, 10 stone = 140 pounds = 63.5 kilograms.

Digital scales often display multiple units for convenience. However, the accuracy and precision may vary between units depending on the scale's design. For best results, use the scale's primary unit (usually the one with the most decimal places) and convert using our tool if needed.