재다 - 셀프 인테리어 자재 계산 도구

Paint Requirements Calculator

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  • The surface of newly constructed drywall must be sufficiently dried after putty application to ensure consistent paint absorption and prevent staining.
  • When painting from a dark color to a light color, you must apply gesso (primer] 1 to 2 times to achieve the original color.
  • To achieve a smooth surface without drips, paint should be applied in thin layers at least twice rather than in a single thick coat.
  • It is recommended to avoid construction on days when the indoor temperature is 5 degrees or lower and humidity is 85% or higher, as drying is slow and cracks may occur.
  • Since consumption varies depending on the type of tool (roller, brush], please allow about 15% extra margin over the calculated value when working on rough surfaces.

How about this calculator?

Paint Quantity Calculator, Guide to Calculating Self-Painting Quantities for Wallpaper, Doors, and Furniture

The first step in DIY painting is accurately calculating the quantity. It is common to order by guesswork, only to find yourself panicking when you run out of paint during the project or having too much left over that is difficult to dispose of. This calculator accurately determines the total paint volume (L] and the number of cans you need to purchase by taking into account the area to be painted (width × height], the number of coats (usually 2], and the coverage area.

Paint Quantity Calculation Formula

The paint consumption is calculated based on the area to be painted, the number of coats, and the product's coverage.

Total required capacity
Required Capacity (L] = {(Width × Height] - Subtracted Area} ÷ Coverage Area per 1L × Number of Coats
The number of necessary heads
Number of bottles to purchase = Round up(Total volume required ÷ Volume per bottle]

Since paint is sold in cans, decimal points in the calculation result are always rounded up.

Detailed Guide to Calculator Input Items

Please check the work environment and product specifications for an accurate quote.

1. Width and height of the area to be painted

Enter the total width and height of the walls or furniture to be painted. Please exclude unpainted areas, such as windows, doors, and electrical outlets, by entering them in the deduction area field.

2. Number of stamps

This refers to the number of coats of paint. Usually, two coats are the standard, but if a light color is applied over a dark color, three or more coats may be required.

3. Coverage area and container capacity per 1L

Enter the coverage area per liter indicated on the back of the product (usually 9㎡ to 11㎡] and the capacity per container of the actual product you wish to purchase (0.9L, 4L, etc.].

Guide to Recommended Uses by Paint Volume

volume General use (based on 2 coats] Expected area (㎡]
1L (0.9L] Two doors (front and back], or one small accent wall Approximately 6.6㎡
4L (1 Gallon] The entire wall surface (4 sides] of the small room, or two children's rooms Approximately 20 ~ 23㎡
18L (1 Mal] Entire wall surface or entire veranda of an apartment in the 20 to 30 pyeong range Approximately 66 ~ 100㎡

Expert Know-how and Checklists

This is the key point of DIY painting that determines the quality of the clean finish.

  • Confirming the necessity of gesso (primer]

    Gesso is a base coat that enhances paint adhesion and covers the original color. It is essential to apply when painting light colors over dark ones or on self-adhesive doors.

  • The Importance of the Second Coat

    The first coat is applied thinly to cover the entire surface, and after drying sufficiently (2 to 4 hours], the second coat must be applied to achieve the original color and a smooth surface.

  • Loss rate according to tool

    Rollers are advantageous for covering large areas, but they hold a lot of paint, resulting in high consumption. Brushes are suitable for narrow spaces, but they may leave brush marks, so please choose according to your needs.

Frequently Asked Questions (FAQ]

  • Q. How should I store leftover paint?
  • A. If you close the lid tightly and store it in a cool place, it can be used for over a year. Please do not throw it away, as it is useful for repairing scratches later.
  • Q. Do I need to mix in water (diluent]?
  • A. It is best to use eco-friendly water-based paint undiluted. Only mix in water up to half a paper cup (5–10%] if it is too thick.
  • Q. Can I paint directly onto the wallpaper?
  • A. Silk wallpaper has a coated surface, so you must apply primer first, whereas laminated wallpaper absorbs paint well even if applied directly. Repair any torn areas with putty before painting.