Tank Size Calculator
Calculate tank capacity, current liquid volume, remaining space, and approximate weight for rectangular and cylindrical tanks.
Choose rectangular, vertical cylinder, or horizontal cylinder.
Add length, width, height, diameter, and fill level.
See total capacity, current volume, free space, and weight.
For rectangular tanks, multiply internal length, width, and height. One cubic meter equals 1,000 liters.
Useful for water tanks, fuel storage, aquariums, irrigation systems, rainwater harvesting, chemical storage, and industrial vessels.
Use internal tank dimensions for usable capacity. Real tanks may hold less because of wall thickness, rounded corners, fittings, and required freeboard.
How do I calculate a rectangular tank?
Multiply the internal length, width, and height, then convert the resulting cubic volume into liters or gallons.
How is cylinder capacity calculated?
Multiply π by the square of the radius and by the cylinder length or height.
Does fill percentage affect total capacity?
No. It changes only the current liquid volume and remaining space.
Can I estimate liquid weight?
Yes. Enter the liquid density in kilograms per liter. Water is approximately 1 kg/L.
Results are estimates generated locally in your browser from standard formulas and general assumptions. They are for planning purposes only, not professional appraisal, inspection, legal or contracting advice. Confirm measurements, costs and regulations with a licensed professional before making property decisions. VisionVix accepts no liability for decisions based on this tool's output.
This calculator provides estimates for planning purposes. Confirm critical storage, structural, safety, and engineering requirements with manufacturer specifications or a qualified professional.
