Quandaries and Queries I need to find a formula to calculate the amount of liquid would hold. maybe the volume or something. its a square box used to hold liquid on a farm . we want to measure how much liquid it can hold. please help. Catherine Hi Catherine You haven't sent any dimensions so I am going to assume that you can measure the box in inches and you want the volume in US gallons. Let us know if you are using other dimensions. Measure the length, width and depth of the box in inches and then the volume in cubic inches is volume(cubic inches)= length width depth One US gallon is 231 cubic inches so to find the volume in gallons divide the result above by 231, that is volume(gallons) = volume(cubic inches)/231 Penny Catherine replied: hi i need to measure the volume of the box in litres so can you help Catherine Oops! it seems I made a false assumption. If you want the volume in liters then I am going to assume this time that you will measure the box in centimeters. Measure the length, width and depth of the box in centimeters and then the volume in cubic centimeters is volume(cubic centimeters)= length width depth There are 1,000 cubic centimeters in a liter so volume(liters) = volume(cubic centimeters)/1,000 Penny Go to Math Central