Welcome to our easy-to-use Weight Calculator. Quickly convert between kilograms, grams, pounds, and ounces for all your fitness, cooking, and scientific measurement needs.
Quickly convert weights between kilograms, grams, pounds, and ounces. Perfect for cooking measurements, fitness tracking, and precise scientific calculations. Try our weight converter for instant and accurate results!
Converting between weight units is simple with our calculator:
The calculator updates in real-time as you type, so there's no need to press any buttons to see your conversions.
When you enter a value, the calculator shows equivalent measurements in all other units:
Results are formatted with appropriate decimal places based on the size of the number, making them easy to read and use. Very small values show more decimal places for precision, while larger values are rounded appropriately.
Our weight calculator offers several advantages:
Weight (more accurately, mass) measurements are used in many aspects of daily life. Here's what each unit represents:
Our calculator uses these conversion factors (with kilograms as the base unit):
1 Kilogram (kg) = 1,000 grams (g)
1 Kilogram (kg) = 2.20462 pounds (lb)
1 Kilogram (kg) = 35.274 ounces (oz)
1 Pound (lb) = 0.453592 kilograms (kg)
1 Pound (lb) = 16 ounces (oz)
1 Ounce (oz) = 28.3495 grams (g)
The general conversion formula is:
Value in target unit = Value in source unit × (Source unit in kg ÷ Target unit in kg)
For example, to convert 5 pounds to kilograms:
5 pounds × 0.453592 kg/lb = 2.26796 kilograms
Here are some frequently used weight conversions for quick reference:
| Pounds (lb) | Kilograms (kg) | Grams (g) | Ounces (oz) |
|---|---|---|---|
| 1 | 0.45 | 454 | 16 |
| 2.2 | 1 | 1,000 | 35.27 |
| 5 | 2.27 | 2,268 | 80 |
| 10 | 4.54 | 4,536 | 160 |
| 50 | 22.68 | 22,680 | 800 |
| 100 | 45.36 | 45,359 | 1,600 |
Although we commonly use the terms interchangeably in everyday language, there is a scientific distinction between weight and mass:
In everyday usage, we typically refer to "weight" when we're actually measuring mass. Our calculator converts between units of mass, though they're commonly called weight units.
The medical community worldwide uses the metric system (kilograms) for several reasons: it's the international scientific standard, it allows for more precise dosing of medications (which are measured in metric units), and it reduces the risk of conversion errors in medical settings.
Our calculator uses standard conversion factors that are mathematically precise. For everyday purposes like cooking, fitness, and general conversions, these calculations are more than accurate enough. For extremely precise scientific work, you may need to consider additional decimal places.
Some digital scales use rounded conversions between units for display simplicity. For example, they might round to the nearest 0.5 lb or 0.2 kg. Our calculator provides mathematically exact conversions based on the standard conversion factors.
Net weight refers to the weight of the product alone, without packaging. Gross weight includes the product plus its packaging. When shipping items, carriers typically charge based on gross weight or dimensional weight (whichever is greater).
While stone is a common weight unit in the UK (1 stone = 14 pounds), it's not as widely used globally as kilograms, grams, pounds, and ounces. We've focused on the most universally used units for simplicity.
Explore these related calculators and guides to complement your weight conversions:
These tools work together to provide a complete measurement conversion solution for all your needs.
Whether you're following a recipe, tracking your fitness progress, shipping packages internationally, or working in a scientific field, our Weight Calculator makes conversions quick and accurate. With instant conversions between kilograms, grams, pounds, and ounces, you'll never need to worry about manual calculations again.