Tank Calc - the easy way to calculate storage tank volumes for vertical storage tanks, horizontal storage tanks or rectangular storage tanks, including a quick-use liquid volume converter. Regal Tanks, tank calculator is really easy to use: - Select the type of storage tank you need to check the capacity of - Enter the tank measurements (metric or imperial) - Optionally enter the liquid fill level of your storage tank - Click the calculate button ... It's that easy! Save your storage tank deta