Convert Weight
Convert weight measurements between different units quickly and accurately
Weight Conversion Calculator
Popular Weight Conversions
Quickly convert between the most commonly used weight units.
Understanding Weight Measurements
Weight and mass conversions are essential for various applications, from cooking and shipping to scientific research and everyday measurements. While mass measures the amount of matter in an object, weight refers to the gravitational force acting on that mass. In everyday usage, both terms are often used interchangeably. Understanding accurate weight conversions ensures consistency and precision across different measurement systems.
Common Weight Units
Metric Units
- Milligram (mg) - 1/1000 of a gram
- Gram (g) - Base unit
- Kilogram (kg) - 1000 grams
- Metric Ton (t) - 1000 kilograms
Imperial/US Units
- Ounce (oz) - 1/16 of a pound
- Pound (lb) - 16 ounces
- Stone (st) - 14 pounds
- US Ton (ton) - 2000 pounds
Common Applications
| Field | Measurement Types | Typical Uses |
|---|---|---|
| Cooking | Grams, Ounces | Recipe preparation, ingredient scaling |
| Shipping | Kilograms, Pounds | Package weight, shipping costs |
| Science | Milligrams, Grams | Precise measurements, laboratory work |
| Medicine | Milligrams, Grams | Drug dosages, medical measurements |
| Everyday Use | Kilograms, Pounds | Personal weight, groceries |
Conversion Tips
- Use a kitchen scale for precise weight measurements in cooking
- For shipping, always verify weight in both metric and imperial units
- In scientific contexts, use metric units for consistency
- Remember that 1 kilogram = 2.20462 pounds
- For small measurements, use milligrams or grams
Weight Conversions
| Conversion | Formula/Rule | Quick Answer |
|---|---|---|
| Kilograms to Pounds | 1 kg = 2.20462 lb | Multiply kg by 2.20462 |
| Pounds to Kilograms | 1 lb = 0.453592 kg | Multiply lb by 0.453592 |
| Grams to Ounces | 1 g = 0.035274 oz | Multiply g by 0.035274 |
| Ounces to Grams | 1 oz = 28.3495 g | Multiply oz by 28.3495 |
| Metric Ton to US Ton | 1 t = 1.10231 ton | Multiply t by 1.10231 |
| US Ton to Metric Ton | 1 ton = 0.907185 t | Multiply ton by 0.907185 |
| Stone to Pounds | 1 st = 14 lb | Multiply st by 14 |
| Pounds to Stone | 1 lb = 0.071429 st | Divide lb by 14 |
| Milligrams to Grams | 1 mg = 0.001 g | Divide mg by 1000 |
| Grams to Milligrams | 1 g = 1000 mg | Multiply g by 1000 |
Our weight conversion tool provides accurate conversions between all major weight units, making it easy to switch between metric and imperial systems. Whether you're cooking, shipping, conducting scientific research, or managing medical dosages, our converter ensures precise and reliable weight conversions for any application.
Weight Conversion Questions
Everything you need to know about weight measurements and conversions
What's the difference between weight and mass?
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.
Why do recipes use different weight measurements?
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.
How accurate should weight measurements be for cooking?
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.
What's the difference between a metric ton and US ton?
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.
How do I convert stone to other weight units?
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.
Why do some scales show different units?
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.
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