Storage Capacity Estimator

Estimate rectangular or cylindrical storage capacity from physical dimensions. Perfect for water tanks, utility sumps, overhead tanks, and bulk storage planning.

Dimension Inputs

Choose the storage shape and enter the inside dimensions to estimate total capacity.

Shape

Measurement Unit

Length (m)

Width (m)

Height (m)

Pro tip

Use the inner fill dimensions for the most accurate result. Real usable storage is typically 85–90% of total geometric volume.

Estimated Capacity

Based on a rectangular container measured in metres.

6,480 L

Total geometric capacity (6.48 kL)

6.48 m³

Raw volume

1,712 gal

Approximate US gallons

Usable capacity @ 90% fill5,832 L

Nearest standard tank size5,000 L

Need demand-based tank sizing too?

Use our water tank calculator to estimate the right capacity from family size, usage pattern, and storage backup days.

For working tanks, leave headroom for overflow, fittings, and maintenance access. Always round up to the next practical commercial tank size.