Paint Calculator

Room paint & primer gallons

Free · Designed for iPad. Not verified for macOS.

Enter the room, match the can, and get finish and primer rounded up to whole gallons. How much paint do you need? Enter the room and get gallons for the job — not a guess. Paint Calculator estimates finish paint and primer from the room, openings, and the coverage on the can. Buy amounts are rounded up to whole gallons. • Length, width, and height in feet and inches • Paint walls, ceiling, or both • Subtracts 21 sq ft per door and 15 sq ft per window • Optional moulding from perimeter × width • Finish and primer coats, with coverage you can match to the label • Square-foot breakdown so you can see the math • Typical finish coverage 350 sq ft/gal; primer 250 — check the can and adjust Estimating tool only. Coverage depends on the paint, surface texture, and color change. Two finish coats is the usual job; set primer coats to 0 if you are not priming.

Ratings & Reviews

  • This app’s overall rating was recently reset.

Version 3.0 is a full rebuild. • Native iPhone and iPad app • Finish and primer gallons, rounded up • Doors, windows, ceiling, and moulding • Coverage from the can, plus a square-foot breakdown

Version 3.0

The developer, MATTHEW ALLEN CHAPMAN, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers
    • Usage Data

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Identifiers
    • Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
MATTHEW ALLEN CHAPMAN
Size
6.3 MB
Category
Utilities
Compatibility
Requires iOS 17.0 or later.
  • iPhone
    Requires iOS 17.0 or later.
  • iPad
    Requires iPadOS 17.0 or later.
  • Mac
    Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English
Age Classification
4+
Copyright
© 2026 Matthew Chapman
  • Developer Website
  • Privacy Policy

    • More by MATTHEW ALLEN CHAPMAN

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