Mass and Weight Converters
Online Mass & Weight Conversion Calculators
Easily convert weights and masses across international metric and Anglo-American customary systems. Essential for international shipping, scientific laboratory calculations, fitness progress, and cooking recipes.
Supported Mass Units
- Metric Units: Milligrams (mg), Grams (g), Kilograms (kg), Metric Tons (t)
- Avoirdupois & Imperial Units: Ounces (oz), Pounds (lbs), British Stones (st)
Popular Weight Conversions
| Conversion Pair | Standard Ratio / Formula | Typical Application |
|---|---|---|
| Kilograms to Pounds | 1 kg ≈ 2.20462 lbs | Gym weight plates, airline baggage limits |
| Pounds to Kilograms | 1 lb = 0.45359237 kg | Medical dosing, cargo freight documentation |
| Grams to Ounces | 1 g ≈ 0.035274 oz | Kitchen recipes, food nutritional labels |
| Ounces to Grams | 1 oz = 28.34952 g | Baking, postal parcel weighing |
| Stones to Kilograms | 1 st = 6.35029 kg | UK and Irish human body weight tracking |
Frequently Asked Questions
What is the difference between mass and weight?
Mass is the amount of matter in an object (measured in kilograms), which remains constant regardless of location. Weight is the gravitational force acting on that mass.
How many pounds are in 1 stone?
There are exactly 14 avoirdupois pounds in 1 British stone (approx. 6.35029 kg).