CoatCalc - Paint Calculator

CoatCalc is an accurate, intuitive paint calculator designed for DIY decorators, homeowners, and trade professionals. Plan your painting projects with confidence, avoid wasted paint, and eliminate guesswork before heading to the paint store.

ACCURATE MULTI-SURFACE PLANNING
- Add multiple walls, grouped walls, and ceilings in a single calculation.
- Enter custom dimensions with instant gross area calculations.
- Support for both Metric (meters, square meters, liters) and Imperial (feet, square feet, gallons) measurement units.

PRECISE OPENING DEDUCTIONS
- Accurately deduct windows, doors, and custom unpainted openings.
- Enter exact opening dimensions and quantities to calculate true net paintable surface area.
- Real-time area preview prevents overbuying or underestimating paint requirements.

CUSTOM COATS AND COVERAGE
- Adjust coat count based on your wall surface and paint type (1, 2, 3, or more coats).
- Customize paint coverage ratings based on the manufacturer specifications printed on your paint can (m²/L or sq ft/gal).
- Clear mathematical formulas show you exactly how the required volume is calculated.

CONTAINER & COST ESTIMATOR
- Enter container sizes (e.g. 1L, 2.5L, 5L, or 1 gallon, 5 gallon cans).
- Calculate the exact number of whole cans to purchase.
- Enter container price to estimate total paint cost for your project.

PROJECT LIBRARY
- Save calculations for rooms, apartments, or entire properties.
- Rename, update, or reference past estimates anytime.
- Clean and focused interface with no clutter.

CoatCalc helps you buy the exact amount of paint you need for every room renovation.