Weight Converter
Convert kg, pounds, ounces, stone, grams, and tonnes quickly and accurately.
Quick presets:
Live Conversion
Metric
Imperial
Precious Metals & Gems
Common References
💡 For cooking: Need to convert cup measurements to grams for a specific ingredient? Use the Ingredient Converter instead — it handles ingredient-specific densities.
Tip: Type in any unit and all others update instantly. Use copy buttons (📋) to copy values for sharing.
How it works
Base Unit: 1 gram Metric to Gram: 1 mg = 0.001 g | 1 kg = 1000 g | 1 tonne = 1,000,000 g Imperial to Gram: 1 oz = 28.35 g | 1 lb = 453.592 g | 1 stone = 6350.29 g | 1 US ton = 907,185 g Precious to Gram: 1 troy oz = 31.1035 g | 1 carat = 0.2 g Common References: 1 kg = 2.205 lb = 35.27 oz = 0.157 stone 1 stone = 6.35 kg = 14 lb 1 tonne = 1000 kg = 2204.6 lb = 1.102 US tons 1 lb = 453.592 g | 1 oz = 28.35 g
Enter a weight in any unit and see the conversion to all others instantly. Supports metric (milligrams to tonnes), imperial (ounces to tons), and precious metal units (troy ounces, carats). Quick-fill buttons for common weights: 1 kg, an average person (70 kg), 100 pounds, and 1 tonne. Note: For cooking ingredient conversions (cups to grams), use the dedicated Ingredient Converter.
Why this matters
Weight is measured differently across the world and in different contexts. Scientists and most countries use grams and kilograms; the US and UK use pounds and stones; jewellers use carats and troy ounces. When you're shipping packages, buying groceries, comparing body weights, or valuing precious metals, you often need to convert between systems. This calculator makes it instant—no mental maths, no confusion, just type and see.
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Learn more
The complete guide to weight converter
Formulas, examples, and tips explained in plain English