Three calculators we use at the counter every day. They run in your browser, nothing is sent anywhere, and no one asks for your number.
Room size in, exact box count out. Wastage covers cuts at edges, breakage and a small reserve for future repairs.
Boxes are rounded up. Buy from a single batch so shade and calibration match across the floor.
See Somany tiles →A planning estimate for a residential build, based on typical fixture counts and riser heights. Use it to budget and to sanity check a plumber's quantity, not as a substitute for the site drawing.
Add roughly 30 percent in fittings by count, and order solvent cement at one 500ml tin per 300 ft of CPVC.
See Astral plumbing →Sizes storage against household demand and how long you want to survive a supply cut. Splitting between an underground sump and an overhead tank is normal, and the split below follows common practice.
Check the terrace slab is designed for the filled weight. One litre is one kilogram, so a 1000 litre tank is a tonne standing on four feet.
See Astral tanks →