Category
Water & Containers
Pools, pipes and tanks: capacity math with exact unit conversions between cubic metres, litres, US gallons and imperial gallons — no silent unit mixing.
Calculators in this category
Fish Tank Volume Calculator
Estimate aquarium capacity from internal dimensions, water depth and displacement.
Open calculator →Pipe Volume Calculator
Estimate the internal water volume of a pipe from internal diameter and length.
Open calculator →Pool Volume Calculator
Estimate pool capacity from shape and depth, with a linear shallow-to-deep option.
Open calculator →Flow Rate Calculator
Convert a measured volume and time, or a pipe diameter and velocity, into flow rate.
Open calculator →Pool Salt Calculator
Compare salt mass for a user-specified increase in concentration.
Open calculator →Pool Shock Calculator
Compare dry cal-hypo product mass for a concentration change you supply.
Open calculator →Choosing between these tools
Choose the tool for the quantity you need, then use its matching measurement mode. Check the product basis before turning area or volume into a purchase order.
Measure a pool before water treatment
Use inside dimensions and representative average water depth. Test the water and consult the exact equipment and chemical labels before interpreting a salt or chlorine addition.
Pool Volume Calculator · Pool Salt Calculator · Pool Shock Calculator
Separate capacity from flow
Pipe volume uses the inside bore. Flow requires a timed collected volume or average velocity. Capacity alone does not determine pressure loss or pump duty.
Pipe Volume Calculator · Flow Rate Calculator
Estimate aquarium water
Measure the actual waterline and internal dimensions. Account for displacement where applicable. Volume alone cannot determine stocking or animal-care requirements.