Spike's Calculators

Calculate the capacity of a square or rectangular-shaped shaped cistern using feet and inches for measurements.

- enter the inside length of the cistern in feet
- enter the inside width of the cistern in feet
- enter the inside height of the cistern in feet

- the volume of the cistern in cubic feet
- the capacity of the cistern in US Gallons
- the capacity of the cistern in Imperial Gallons
- the capacity of the cistern in Litres

- Capacity of a Round Cistern - Imperial measurements
- Capacity of a Round Cistern - Metric measurements
- Capacity of a Square or Rectangular Shaped Cistern - Imperial measurements
- Capacity of a Square or Rectangular Shaped Cistern - Metric measurements
- Collecting Rain Water from a Catchment Area/ Inch per Square Foot
- Rainfall per Unit Area, Inch per Acre
- Rainfall per Unit Area, Millimetres per Acre
- Rainfall per Unit Area, Millimetres per Hectare

- Garden Hose Flow Calculator
- Measuring the Water Flow from a Tap in Gallons per Minute
- Measuring the Water Flow from a Tap in Litres per Minute
- Water Application Rate for an Area

- Pressure Loss in Pipes from Friction
- Valves and Fittings 1/2" to 24" diameter, equivalent length calculation