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What is a Weight Converter?
A weight converter changes a mass value between metric and imperial units — milligrams, grams, kilograms, tonnes, ounces, and pounds. Indian kitchens often follow recipes written in grams while packaged food overseas lists ounces; gym-goers track body weight in kilograms but read US fitness content in pounds; couriers and e-commerce sellers must convert parcel weight into whichever unit a shipping partner bills by. Jewellers dealing in tola or gram equivalents, nutritionists calculating protein-per-kilogram targets, and students solving physics problems all need a mass conversion that's instant and error-free rather than a manual multiplication.
Conversion Formula
Each unit is converted to kilograms first (the base unit), then divided by the target unit's kilogram-equivalent:
Result = value in kilograms ÷ (target unit factor)
Common Conversion Factors
| Unit | Equal to (kilograms) |
|---|---|
| Milligram (mg) | 0.000001 kg |
| Gram (g) | 0.001 kg |
| Kilogram (kg) | 1 kg (base unit) |
| Tonne | 1,000 kg |
| Ounce (oz) | 0.0283495 kg |
| Pound (lb) | 0.453592 kg |
Worked Example
Converting a 70 kg body weight into pounds — a common ask when comparing with US fitness charts:
Similarly, a 250 g packet of spices converts to ounces as: 250 × 0.001 = 0.25 kg, then 0.25 ÷ 0.0283495 ≈ 8.82 oz.
How to Use This Calculator
- Enter the mass value you want to convert.
- Select the unit you're converting from.
- Select the unit you're converting to.
- Click Calculate to view the result instantly.
After converting weight, you might also need the BMI Calculator to check a healthy weight range, or the Length Converter for the matching height figure.
📅 Last reviewed: July 2026 · Formulas verified against RBI/SEBI/IT Dept guidelines.