Home Paint

Paint

One gallon covers 350 square feet per coat. A door is 21 and a window is 12.

Gallons needed

2.8

Liters
10.6
Walls and ceiling
528
Taken off
45
Paintable
483

Walls are length plus width, times height, times 2. A door is 21 square feet and a window is 12. One gallon covers 350 square feet per coat, and primer adds one coat. 12, 12, 8, one door, two windows, and two coats are 2.8 gallons.

Why this exists

Buying one can short shows up at the corners. Counting a door as wall leaves a can behind.

The area is in feet, and liters use 3.785411784 liters in a US gallon. The numbers stay in this browser.

  1. 01How to use it

    Length 12, width 12, and height 8 make walls of 384 plus a ceiling of 144, which is 528. One door of 21 and two windows of 24 remove 45 and leave 483. Two coats need 2.8 gallons, or 10.6 liters. Adding primer makes 4.1 gallons.

    Walls are length plus width, times height, times 2. A door is 21 square feet and a window is 12. One gallon covers 350 square feet per coat, and primer adds one coat. 12, 12, 8, one door, two windows, and two coats are 2.8 gallons.

  2. 02What you get

    528 / 45 / 483.

    2.8 / 10.6 / 4.1.

    Entered12 · 528 · 483 · 2.8

    12 8
    528 483
    45 350
    2.8 10.6

  3. 03Worth knowing

    Walls are length plus width, times height, times 2. A door is 21 square feet and a window is 12. One gallon covers 350 square feet per coat, and primer adds one coat. 12, 12, 8, one door, two windows, and two coats are 2.8 gallons.

    Buying one can short shows up at the corners. Counting a door as wall leaves a can behind.

Questions

Q2.8?
A483 / 350 / 2.8
Q10.6?
A10.6
Q45?
A21 / 12 / 45
Q4.1?
A4.1

How this page works it out

Walls are length plus width, times height, times 2. Length 12, width 12, and height 8 make walls of 384. The ceiling is length times width, 144, and the two together are 528.

A door is 21 square feet and a window is 12. One door and two windows are 21 plus 24, which is 45. Subtracting 45 from 528 leaves 483 to paint. One gallon covers 350 square feet per coat. 483 times 2 divided by 350 is 2.8 gallons, and a US gallon turns that into 10.6 liters.

Primer adds one coat. That total is 4.1 gallons. The numbers stay in this browser.

  • # 2.8
  • # 10.6
  • # 483
  • # 350