An aquarium volume calculator for a cylinder tank converts inner length, width, and water height to litres, US gallons, and UK gallons. Substrate litres use the footprint times gravel depth. Glass thickness is not subtracted; measure inside.
Cylinder litres are π r² h / 1000 with length as diameter. A 50 cm diameter × 60 cm high cylinder is about 118 L.
Water volume
286.3 L
Results can be wrong. This calculator is unofficial. Figures can be incomplete, rounded, or not updated. Use them at your own risk and check a tape, datasheet, ball band, or official chart before cutting, mixing, buying, or publishing. Measure inside the glass. Hexagon length is point-to-point; a flat-to-flat measure will mis-size the tank. Bowfront extra is an ellipse, not the real curve. Limits of liability are in the terms of service.
Inner. Outer millimetres include glass thickness and overstate water.
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Publisher notes · reviewed 29 October 2026
Length is diameter. A 50 cm diameter × 60 cm height is about 118 L.
Gas exchange is not computed. Volume only.
50 × 60 cm cylinder
≈ 118 L.
