French drain, pipe, and water management calculators. Browse our free drainage tools below — all calculators are instant, accurate, and require no sign-up.
Drainage Pipe Calculator — Calculate drainage pipe length, diameter, and fittings for residential drainage systems. Enter trench details for complete pipe and material estimates.
French Drain Calculator — Calculate gravel, pipe, and fabric for French drains. Enter trench length, width, and depth for complete material and cost estimates.