Calculators
Interactive calculators for pond and aquarium sizing, pumps, filters and liners.
Pond Pump Size Calculator
Work out the pond pump flow rate you need based on pond type, sunlight and fountain height, and see real matching pumps from our range.
Pond Liner Size Calculator
Work out the exact pond liner size you need, including overlap for anchoring the edges, from your pond length, width and depth.
Fish Tank Volume Calculator
Calculate your fish tank's volume in litres from length, width and height in cm or feet — get the right numbers to size a filter, heater or stocking level.
Pond Filter Size Recommender
Find the right pond filter for your pond volume and stocking level, matched against our real filter range.
Pond Volume Calculator
Calculate your pond's volume in litres for rectangular or irregular shapes — get the right numbers to size a pump, UV clarifier, or treatment dose.