Weight Conversion Calculator Weight Conversion Calculator Convert a weight value from one unit to another. * Enter the weight value and select the units. Step 1: Enter Conversion Data Weight Value: From Unit: Grams (g) Kilograms (kg) Pounds (lb) Ounces (oz) Stones (st) To Unit: Grams (g) Kilograms (kg) Pounds (lb) Ounces (oz) Stones (st) Convert Weight Conversion Result Converted Value: New Conversion