Calculate Gravity from Target Volume This will calculate a new gravity based on a stated target volume. Negative values indicate volume reduction, i.e. evaporation. Volume units aren't important. Wort Volume Litres Current Gravity SG Target Volume Litres New Gravity SG Difference SG
Calculate Volume from Target Gravity This will calculate a new volume based on a stated target gravity. Negative values indicate volume reduction, i.e. evaporation. Volume units aren't important. Wort Volume Litres Current Gravity SG Target Gravity SG New Volume Litres Difference