A free tool by Aziz Saif · azizsaif.com ↗

Free home renovation tools that actually do the math.

Ten calculators, no spreadsheet. Estimate paint, tiles, flooring, wallpaper, concrete, plasterboard, carpet and tile adhesive — then build a room-by-room budget and generate a clean printable quote. All in your browser. No sign-up, nothing to install.

✓ Metric & imperial ✓ Live cost estimates ✓ Works offline ✓ Print to PDF
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Paint Calculator

Work out how much paint you need for a room, including coats and a doors/windows deduction.

Room

Paint & price

m² per litre
You need
—
of paint
Paintable area—
Total with coats—
Cans/tins to buy—
Estimated cost—
Assumes ~1.9 m² per door and ~1.4 m² per window deducted. Round up when buying — coverage varies by surface and brand.
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Tile Calculator

How many tiles and boxes you need for a floor or wall, with a waste allowance for cuts.

Surface to tile

Tile size

You need about
—
tiles (incl. waste)
Surface area—
Tiles before waste—
Boxes to buy—
Estimated cost—
Order at least one spare box for future repairs — dye lots are hard to match later.
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Flooring Calculator

Boxes of laminate, vinyl, or hardwood planks needed to cover a room, with cutting waste.

Room

Product

8% standard · 15% diagonal
You need
—
boxes
Room area—
Area incl. waste—
Coverage bought—
Estimated cost—
Buy underlay separately. Let planks acclimatise in the room for 48 hours before fitting.
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Wallpaper Calculator

Rolls needed for a room, accounting for pattern repeat and standard roll size.

Room

Roll & pattern

0 = plain / no repeat
You need
—
rolls
Strips needed—
Usable strip length—
Strips per roll—
Estimated cost—
Pattern repeat reduces how many strips you get per roll. Always buy from the same batch number.
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Concrete & Screed Calculator

Volume of concrete or screed for a slab, base or footing — plus how many premix bags and the cost.

Pour dimensions

Supply

~0.011 m³ per 25 kg bag
You need
—
of concrete
Base volume—
With waste—
Premix bags—
Estimated cost—
For volumes over ~1 m³, ready-mix delivery is usually cheaper than bags. Order a little extra — you can't pour half a slab twice.
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Plasterboard / Drywall Calculator

Sheets of plasterboard for walls or ceilings, with screws and joint compound to finish.

Surface to board

Sheet & price

2.4×1.2 m = 2.88 m²
You need
—
sheets
Surface area—
Screws (~30/sheet)—
Joint compound—
Sheets cost—
Screws and compound are estimates (≈30 screws and ≈0.5 kg ready-mix per sheet). Add corner bead and tape for finished joints.
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Carpet Calculator

Broadloom carpet is sold by roll width, so the room's narrow dimension creates waste. This works out the real metres you'll pay for.

Room

Carpet roll

You need
—
of carpet on the roll
Room area—
Area billed (roll width)—
Waste from roll width—
Estimated cost—
Carpet is cut across the full roll width, so a 3.5 m-wide room on a 4 m roll still bills the full 4 m. Run the length along the longer wall to cut waste.
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Tile Adhesive & Grout Calculator

How much adhesive (bags) and grout (kg) to lay and finish a tiled area. Pairs with the Tile Calculator.

Area & tile

Settings

3–6 typical
You need
—
adhesive bags
Tiled area—
Adhesive total—
Grout needed—
Estimated cost—
Adhesive use depends on tile size and trowel notch — bigger tiles need more. Grout scales with joint width, tile size and thickness.
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Renovation Budget Estimator

Build a room-by-room budget, add a contingency, and see the total. Saved automatically in your browser.

Line items

10–20% recommended
Project total
—
incl. contingency
Subtotal—
Contingency—
Line items—
Grand total—
Auto-saved. A contingency covers surprises behind walls — old wiring, damp, uneven floors.
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Quote & Scope Generator

Fill in the details and generate a clean, printable quote or scope-of-work you can save as PDF.

Your details

Line items