A little math.
A better weekend project.
Turn room measurements into gallons, boxes and bags. Free DIY calculators with adjustable coverage, whole-package quantities, and a shopping list you can print.
No sign-up · Plans save on this device · Your measurements stay private
What’s on your weekend list?
One project. One clear shopping list.
Paint a room. Or a few.
Add rooms, subtract measured openings, and build separate wall, ceiling and primer orders.
Open paint calculator ↗PLANKS, TILES & BOXESGet the flooring order right.
Include cuts and overage, round up to full boxes, and compare material costs.
Open flooring calculator ↗BEDS, BORDERS & YARDSWork out bags versus bulk.
Convert bed area and chosen depth into volume, then compare bag and delivery prices.
Open mulch calculator ↗Before you open the first can.
Browse project guides →Measure cabinets, not the kitchen floor.
A door-and-drawer calculator, with separate face, frame and primer quantities.
A garage estimate depends on its surfaces.
Work from wall height, openings, ceiling area, coats and product coverage.
What does a waste allowance cover?
Understand cuts and spare material before choosing an overage percentage.
From cubic yards to bags.
Use the volume printed on the bag; keep coverage and depth separate.
Your measurements.
The product’s instructions.
Our examples show the arithmetic. Coverage, waste and depth depend on the actual product and project; change the assumptions before you shop.
These are material estimates, not installation or structural assessments. Manufacturer instructions take priority. Plans saved in your browser can be removed in the tool or your browser settings.
How we calculate & cite sources →