Estimate litres of paint and tins to buy for any UK room or exterior wall.
About Paint Calculator
Paint Calculator is a tools app developed by Darryl Jackson.
Download Statistics
Paint Calculator has been downloaded 10 times. In the last 30 days, the app was downloaded 8 times.
User Ratings
The app has no ratings yet.
App Information
Paint Calculator is FREE to download. The APK download size is 19.42 MB. The latest version available is 1.0.0. The last update was on May 11, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on Google Play 6 weeks ago.
Description
Paint Calculator estimates exactly how many litres of paint and which tin sizes you need for any UK painting project — built for tradespeople and DIYers.
Enter your room dimensions, pick a paint type, set surface condition and number of coats, and the app does the rest. Subtract door and window openings, apply waste allowance, and add a price-per-litre to see total cost in pounds.
KEY FEATURES
• 8 UK paint type presets — matt emulsion, silk emulsion, gloss, satinwood, eggshell, primer, masonry, ceiling paint • Coverage rates matched to manufacturer TDS (Dulux Trade, Crown Trade, Johnstone's) • Walls only, ceiling only, or walls + ceiling surface modes • Surface condition: previously painted vs bare (with auto coverage adjustment) • Masonry texture mode: smooth render vs textured pebbledash (drops coverage to ~5 m²/L per Dulux Weathershield TDS) • Per-paint default coats (primer 1, finishes 2) — overridable • Subtract openings (doors, windows) from gross wall area • Waste allowance 0–25% (default 10%) • Smart tin recommendation — compares single-tin vs greedy multi-tin and picks whichever wastes less paint (UK tin sizes: 750ml, 1L, 2.5L, 5L, 7.5L, 10L, 12L) • Optional cost estimation with price-per-litre input • Domain warnings — paint/surface mismatch, single-coat opacity, bare-needs-primer, exterior temperature limits (8–30 °C masonry), gloss-over-gloss adhesion • Share results to text/email/messaging apps
CALCULATION ACCURACY
Coverage rates verified against Dulux Trade, Crown Trade, and Johnstone's technical datasheets. Tin sizes match B&Q, Homebase, and trade merchant SKUs. Bare-surface coverage uses a 30% reduction multiplier industry standard for new plaster, MDF, and timber.
WHO IT'S FOR
• Painters and decorators sizing up jobs • Home renovators planning a room repaint • Quantity surveyors estimating materials • DIYers shopping at B&Q, Homebase, Wickes, or trade merchants
OFFLINE READY
Calculate without an internet connection. Results saved nowhere — all numbers stay on your device.
DISCLAIMER
This calculator is a planning tool. Always cross-check critical material orders with your paint supplier or a qualified decorator. Coverage rates vary with applicator (brush vs roller vs spray), surface profile, and colour change. For multi-paint jobs (e.g. masonry walls + ceiling paint), run separate calculations per paint type to avoid double-counting area.
Recent changes: First release. 8 UK paint type presets, walls/ceiling/exterior surface modes, smooth vs textured masonry, bare vs painted surface adjustment, smart tin recommendation across 7 UK tin sizes, openings subtraction, cost estimation, share results, domain warnings for paint/surface mismatch and application conditions.
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