Weight (Mass) Conversion Guide – Kilograms, Pounds, Grams, Ounces & More
Quick Weight Conversion Cheat Sheet
Use this quick reference guide to easily convert between common weight and mass units such as kilograms (kg), grams (g),
pounds (lb), ounces (oz), stones (st), and tons. Perfect for cooking, fitness, science, and trade conversions.
- 1 kilogram (kg) = 1000 grams (g)
- 1 pound (lb) = 16 ounces (oz) ≈ 0.453592 kilograms (kg)
- 1 ounce (oz) ≈ 28.3495 grams (g)
- 1 stone (st) = 14 pounds (lb) ≈ 6.35029 kilograms (kg)
- 1 metric tonne (t) = 1000 kilograms (kg)
- 1 US ton (short) = 2000 pounds (lb) ≈ 907.185 kilograms (kg)
- 1 UK ton (long) = 2240 pounds (lb) ≈ 1016.05 kilograms (kg)
- 1 carat (ct) = 0.2 grams (g)
How Weight Conversions Are Calculated
Weight and mass conversions are calculated using a base unit (kilogram, kg). Your input value is first converted
to kilograms using a known conversion factor, and then from kilograms to the target unit.
This two-step conversion method ensures maximum accuracy across all units, from grams and ounces to pounds and tons.
Examples: 1 lb × 0.453592 = 0.453592 kg; 1 oz × 28.3495 = 28.3495 g; 1 st = 14 lb ≈ 6.35029 kg.
When to Use Each Weight Unit
- Grams (g) / Kilograms (kg): Common in science, nutrition, packaging, and most countries using the metric system.
- Ounces (oz) / Pounds (lb) / Stones (st): Used for food measurements, fitness tracking, and body weight in the US and UK.
- Tonnes (t) / Tons (US/UK): Ideal for heavy loads, shipping, and industrial use.
- Carat (ct), Grain (gr), Dram (dr): Used in jewelry (carat), ammunition (grain), and pharmaceuticals (dram).
Tip: For international conversions, always check whether the measurement follows the metric or imperial system.
