Home Projects calculators
Room area, paint, tile, flooring, and wallpaper estimates.
Home Projects tools
Use these calculators for general informational estimates and simple arithmetic. Check the formula, units, examples, and limitations on each calculator page before relying on a result.
Paint calculator
Estimate paint from room dimensions, openings, coats, coverage, waste, and container size.
Tile calculator
Estimate tile pieces, coverage, boxes, waste, and leftover tile from project area and tile size.
Room area calculator
Calculate room area for one or two rectangular sections, subtract cutouts, and estimate perimeter.
Flooring calculator
Estimate flooring area, waste, boxes, cost, and leftover coverage.
Wallpaper calculator
Estimate wallpaper rolls from room perimeter, wall height, openings, roll size, repeat, and waste.
How to use this category
- Choose the calculator that matches the task and units you have.
- Enter realistic values from your receipt, recipe, schedule, room measurement, appliance label, or trip plan.
- Read the visible formula, result breakdown, and assumptions before using the estimate.
Related categories
Estimate boundaries
These tools do not replace qualified professional review. Use them for transparent arithmetic, quick checks, and low-stakes planning only.