Find how many litres of water a pipe holds from its diameter and length, and the flow at a given speed.
Enter the inner diameter, length and optionally flow speed, then click Calculate.
Volume = π × (diameter ÷ 2)² × length.
Use the inner diameter of the pipe.
About 1–2 m/s in household pipelines.
No, pressure and friction change real flow.
Calculate the capacity of a rectangular or round water tank in litres and the time a motor takes to fill it.
Calculate cubic feet (CFT) of timber or wood pieces from length, width and thickness and find the total cost.
Find concrete volume and the cement bags, sand and aggregate needed for a slab, floor or column in M15, M20 or M25 mix.
Estimate litres of paint for a room from its size, doors, windows and number of coats.
Find how many bags, cartons or items a truck can carry by weight capacity and by body space.
Calculate area, perimeter, volume and surface area for circle, rectangle, triangle, sphere, cylinder, cone, cube and cuboid.