Plumbing & Water
Material quantity calculators using standard densities and coverage rates, with sensible waste margins.
Pipe Volume Calculator
Calculate the internal volume of a pipe in liters and US gallons from its inner diameter and length, using the cylinder volume formula.
Water Tank Calculator
Calculate the volume, weight and fill level of a cylindrical or rectangular water tank in liters, cubic meters and US gallons.
Pool Volume Calculator
Calculate swimming pool water volume in liters, US gallons and cubic meters from pool shape, dimensions and shallow/deep-end depths.
Pond Volume Calculator
Estimate garden pond volume in liters and US gallons from length, width and average depth, using the ~80% rule for irregular informal pond shapes.
Pond Liner Calculator
Work out the flexible pond liner sheet size from pond length, width, maximum depth and edge overlap, using the standard dimension + 2×depth + 2×overlap rule.
Pipe Flow Rate Calculator
Calculate volumetric flow through a pipe from inner diameter and flow velocity using the continuity equation Q = v × A. Results in L/s, m³/h and US gpm.
Rolling Offset Calculator
Calculate pipefitting rolling offsets: true offset from roll and offset, then travel and run for 45°, 30° or 60° fittings using the standard trade formulas.