Room Paint Calculator & Cost!

Paint Calculator & Room Estimator — get an instant, accurate estimate of how much paint you need and what it will cost, for any room or full home project. No internet connection.

Whether you're painting a bedroom, prepping a full house repaint, or quoting a client as a professional painter, this app turns your room measurements into a clear paint quantity, coverage plan, and total project cost in seconds.

KEY FEATURES

Wall & Ceiling Area Calculator — enter length, width, and height for exact paintable surface area
Paint Quantity Estimator — litres or gallons needed, based on coverage rate and number of coats
Paint Cost Calculator — budget by cost-per-litre or cost-per-gallon
Door & Window Deductions — subtract non-paintable areas for a precise estimate
Multi-Room Project Planner — combine rooms into one project total
Paint Finish Guide — matte, eggshell, satin, semi-gloss, gloss
Built-In Unit Converter — sq ft ⇄ sq m, litres ⇄ gallons, feet ⇄ meters, inches ⇄ cm
Estimation History — revisit past calculations anytime
Light & Dark Theme
100% Offline, no account required.

HOW IT WORKS

Enter room dimensions
Deduct doors and windows
Set paint coverage rate and number of coats
Get an instant quantity and cost estimate, saved to your history

WHO IT'S FOR

Homeowners planning a DIY repaint, renters estimating a touch-up, and painters or contractors quoting a job, anyone who wants to stop overbuying or underbuying paint.