Paint Calculator
How much paint, primer, ceiling and trim paint for every room — in gallons and litres, with a buy-this-many-cans answer.
How much paint, flooring or concrete do you actually need?
CalcMyHome turns a tape measure into a shopping list. Work out quantities, waste, and an honest cost estimate — in US or UK units — then print the list and buy right the first time.
Free calculators, built for real projects
Flooring & Tile Calculator
Laminate, vinyl plank and tile, room by room. Boxes, waste by layout, underlayment and trim, all in one result.
Concrete & Decking Estimator
Slabs in cubic yards or metres and bags, decks in boards, joists, posts and screws — a full materials list, not just a volume.
Moving Cost & Box Planner
DIY vs professional, as an honest low–mid–high range, plus how many boxes each room needs and a packing checklist.
Why CalcMyHome?
US and UK units, one page
Feet and gallons, or metres and litres — switch any time. No second calculator, no mental conversion.
Multi-room totals
Add every room to one calculation and get one shopping list, instead of doing the same maths four times.
Honest ranges, not fake precision
Coverage and prices vary by product and place. We show ranges, editable rates, and say so — so you can trust the number you buy against.
Save, share, print
Your results are saved on your device, shareable by link, and printable as a shopping list to take to the store.
How to use a calculator here
- Measure each room — length, width and height. A tape measure and five minutes is enough.
- Enter your numbers and pick your units, coats and layout. Every rate is editable.
- Check the result — quantities, waste, and what to buy, with the working shown.
- Print the shopping list and take it to the store.
All results are planning estimates. Prices vary by store and product, coverage varies by surface, and concrete and decking work has structural and building-code implications — get professional advice where it matters. See the disclaimer on each tool page.