Calculation of the amount of primer for surface preparation
An online primer calculator will help you calculate the required amount of primer to prepare the surface of the walls before painting or wallpapering. The dimensions of the room, the height of the walls, the area of windows and doors, the consumption rate and the reserve for losses are taken into account. The primer is applied in one layer.
The primer calculator uses precise formulas to calculate the amount of material based on primer type, surface condition, application method and operating conditions. Suitable for calculating various types of primer: acrylic, alkyd, deep-penetrating, universal. Calculation formula: Amount of primer = (Wall area - Opening area) × Consumption rate (l/m²) × (1 + Stock / 100).
Let's look at practical examples of calculating the amount of primer for various rooms and types of primer:
Standard bedroom with ceiling height 2.7 m, acrylic primer
Входные данные:
Length: 4 m, Width: 3 m, Height: 2.7 m
Window: 1.2×1.5 m
Door: 0.9×2.0 m
Consumption rate: 0.1 l/m²
Stock: 10%Расчёт:
Wall area: 2 × (4 + 3) × 2.7 = 37.8 m²
Opening area: 1.2×1.5 + 0.9×2.0 = 3.6 m²
Usable area: 37.8 - 3.6 = 34.2 m²
Primer consumption: 34.2 × 0.1 = 3.42 l
With reserve: 3.42 × 1.1 = 3.76 l
Packs (10 l): 3.76 / 10 = 0.38 ≈ 1 packРезультат:
Required: 3.76 l (1 pack 10 l)
Тип:
Acrylic primer
Standard bedroom, it is recommended to take 1 package with a small margin
Large living room with ceiling height 2.7 m, universal primer
Входные данные:
Length: 5 m, Width: 4 m, Height: 2.7 m
Windows: 2 pieces, 1.5×1.5 m each
Door: 0.9×2.0 m
Consumption rate: 0.12 l/m²
Stock: 15%Расчёт:
Wall area: 2 × (5 + 4) × 2.7 = 48.6 m²
Opening area: 2×1.5×1.5 + 0.9×2.0 = 6.3 m²
Usable area: 48.6 - 6.3 = 42.3 m²
Primer consumption: 42.3 × 0.12 = 5.08 l
With reserve: 5.08 × 1.15 = 5.84 l
Packs (10 l): 5.84 / 10 = 0.58 ≈ 1 packРезультат:
Required: 5.84 l (1 pack 10 l)
Тип:
Universal primer
For a large room, an increased margin of 15% is recommended.
Kitchen with a ceiling height of 2.5 m, deep-penetrating primer
Входные данные:
Length: 3 m, Width: 2.5 m, Height: 2.5 m
Window: 1.2×1.2 m
Door: 0.8×2.0 m
Consumption rate: 0.12 l/m²
Stock: 10%Расчёт:
Wall area: 2 × (3 + 2.5) × 2.5 = 27.5 m²
Opening area: 1.2×1.2 + 0.8×2.0 = 3.04 m²
Usable area: 27.5 - 3.04 = 24.46 m²
Primer consumption: 24.46 × 0.12 = 2.94 l
With reserve: 2.94 × 1.1 = 3.23 l
Packs (5 l): 3.23 / 5 = 0.65 ≈ 1 packРезультат:
Required: 3.23 l (1 pack 5 l)
Тип:
Deep penetrating primer
A deep-penetrating primer is recommended for the kitchen.
Children's room with ceiling height 2.6 m, acrylic primer
Входные данные:
Length: 4 m, Width: 3.5 m, Height: 2.6 m
Window: 1.5×1.5 m
Door: 0.9×2.0 m
Consumption rate: 0.1 l/m²
Stock: 10%Расчёт:
Wall area: 2 × (4 + 3.5) × 2.6 = 39.0 m²
Opening area: 1.5×1.5 + 0.9×2.0 = 4.05 m²
Usable area: 39.0 - 4.05 = 34.95 m²
Primer consumption: 34.95 × 0.1 = 3.5 l
With reserve: 3.5 × 1.1 = 3.85 l
Packs (5 l): 3.85 / 5 = 0.77 ≈ 1 packРезультат:
Required: 3.85 l (1 pack 5 l)
Тип:
Acrylic primer
An eco-friendly acrylic primer is recommended for children's rooms.
Large ceiling, universal primer
Входные данные:
Length: 6 m, Width: 5 m
Ceiling area: 30 m²
Consumption rate: 0.12 l/m²
Stock: 15%Расчёт:
Usable area: 30 m²
Primer consumption: 30 × 0.12 = 3.6 l
With reserve: 3.6 × 1.15 = 4.14 l
Packs (5 l): 4.14 / 5 = 0.83 ≈ 1 packРезультат:
Required: 4.14 l (1 pack 5 l)
Тип:
Universal primer
For the ceiling, an increased margin of 15% is recommended
Small bathroom with a ceiling height of 2.5 m, moisture-resistant primer
Входные данные:
Length: 2 m, Width: 1.5 m, Height: 2.5 m
Door: 0.9×2.0 m
Consumption rate: 0.12 l/m²
Stock: 10%Расчёт:
Wall area: 2 × (2 + 1.5) × 2.5 = 17.5 m²
Opening area: 0.9×2.0 = 1.8 m²
Usable area: 17.5 - 1.8 = 15.7 m²
Primer consumption: 15.7 × 0.12 = 1.88 l
With reserve: 1.88 × 1.1 = 2.07 l
Packs (5 l): 2.07 / 5 = 0.41 ≈ 1 packРезультат:
Required: 2.07 l (1 pack 5 l)
Тип:
Moisture-resistant primer
The bathroom requires a moisture-resistant primer
Primer calculation includes several stages to obtain an accurate result, taking into account all the parameters of the room and the type of primer. The primer is applied in one layer.
Основные типы грунтовки и их характеристики:
0.08-0.12 л/м²
0.1-0.15 л/м²
0.1-0.15 л/м²
0.12-0.15 л/м²
Расход грунтовки в зависимости от типа поверхности:
0.08-0.1 л/м²
0.1-0.12 л/м²
0.12-0.15 л/м²
0.1-0.12 л/м²
0.08-0.12 л/м²
Using a primer calculator provides many advantages when planning repairs: accurate calculation of the amount of material, cost savings, procurement planning, waste minimization.
The calculator uses proven formulas taking into account all the parameters of the room, type of primer and surface condition to obtain an accurate result.
Correct calculation allows you to avoid waste of material and unnecessary costs for purchasing unnecessary primer packages.
Knowing in advance the required amount of primer, you can plan the budget and purchase of materials for repairs.
The simple and intuitive interface of the calculator allows you to quickly calculate the required amount of primer.
To obtain an accurate result, follow our recommendations when calculating the primer.
To calculate the primer, measure the length, width and height of the walls of the room, subtract the area of windows and doors, multiply by the consumption rate (usually 0.08-0.15 l/m²) and add a margin of 10-15%. The calculator will automatically perform all calculations.
Primer consumption is usually 0.08-0.12 l/m² for smooth surfaces and 0.12-0.15 l/m² for porous surfaces. The primer is applied in one layer.
Typically the primer is applied in one layer. Highly porous surfaces may require a second coat. In such cases, the consumption doubles.
Acrylic primer is universal, suitable for various surfaces (consumption 0.08-0.12 l/m²). Alkyd primer is used for wood and metal (consumption 0.1-0.15 l/m²). The quantity calculation for both types is the same.
For a bedroom, measure the dimensions of the room, indicate the area of windows and doors. Use acrylic or universal primer. Consumption rate 0.1 l/m². Add a margin of 10%.
For the ceiling, measure the ceiling area in square meters. Ceilings usually require more primer due to the difficulty of application. Use a consumption rate of 0.1-0.12 l/m². Add a margin of 15%.
For walls, it is recommended to use an acrylic or universal primer for various surfaces. For wet areas, use a moisture-resistant primer. For porous surfaces, use a deep-penetrating primer.
For the kitchen, use a moisture-resistant acrylic or deep-penetrating primer. Measure the area of the walls, subtract the area of windows and doors. Use a consumption rate of 0.12 l/m² for wet areas. Add a margin of 10-15%.
A standard 5 liter package of primer weighs approximately 5-7 kg. A 10 liter package weighs approximately 10-14 kg. There are also packages of 1 l, 2.5 l and 20 l.
For the bathroom, use a moisture-resistant, deep-penetrating primer. Measure the area of the walls, subtract the area of the door. Use a consumption rate of 0.12-0.15 l/m² for wet rooms. Add a margin of 10%.
A deep-penetrating primer penetrates deep into the pores of the material, strengthens the surface and improves adhesion. Consumption is 0.1-0.15 l/m². Used for loose and porous surfaces.
For the living room, measure the area of the walls, subtract the area of windows and doors. Use acrylic or universal primer. Consumption rate 0.1 l/m². Add a margin of 10%.
Yes, be sure to take all windows and doors into account when calculating your primer. Subtracting the area of the openings from the total area of the walls allows you to obtain the exact usable area for processing and avoid wastage of material.
For a children's room, measure the area of the walls, subtract the area of windows and doors. It is recommended to use an environmentally friendly acrylic primer. Use a consumption rate of 0.1 l/m². Add a margin of 10%.
A universal primer suitable for various types of surfaces (concrete, plaster, plasterboard, wood). It is convenient for small jobs. Consumption is 0.1-0.12 l/m². The calculation of the quantity is the same as for a regular primer.
For the corridor, measure the length and width, the height of the ceilings. Consider all the doors in the hallway. Use a consumption rate of 0.1-0.12 l/m². Add 10-15% margin for adjustment.
For a room with an area of 20 m² (approximately 4 × 5 m) with a standard ceiling height of 2.7 m, you need approximately 3-4 liters of primer (1 package 5 liters), taking into account a margin of 10%.
For a studio, measure the area of all walls. Consider all windows and doors. Select the type of primer depending on the zoning. For open spaces, use a universal primer. Add a margin of 10-15%.
Antiseptic primer contains substances that prevent the formation of mold and mildew. Consumption is 0.12-0.15 l/m². Used for wet rooms and rooms with high humidity. The calculation of the quantity is the same as for a regular primer.
For the toilet, measure the area of the walls. Subtract the area of the door. Use a moisture-resistant antiseptic primer. Consider the small area of the room. Use a flow rate of 0.12 l/m². Add a margin of 10%.
For painting, it is recommended to use an acrylic or universal white primer. It creates a uniform base for paint, consumption 0.1-0.12 l/m². After priming, wait until completely dry before painting.
For an apartment, calculate the area of each room separately. Use different types of primer for different rooms (moisture-resistant for kitchens and bathrooms, regular for living rooms). Add up the results for the total number of packages.
Yes, be sure to buy a primer with a margin of 10-15% for adjustment, defects and possible errors during application. A stock will help avoid a situation where there is a small quantity missing and it is difficult to find exactly the same one in the store.
For the hallway, measure the area of the walls. Consider all doors. Use a wear-resistant, high-traffic primer. Use a consumption rate of 0.1-0.12 l/m². Add 10-15% margin for adjustment.
Adhesive primer improves the adhesion of materials to the surface. Consumption is 0.1-0.15 l/m². Used on smooth surfaces before painting or wallpapering. The calculation of the quantity is the same as for a regular primer.
For a house, calculate the area of each room separately. Use different types of primer for different spaces. Add up the results for the total number of packages. Keep in mind that for large rooms it is better to buy primer in bulk.
The drying time of the primer depends on the type and conditions. Acrylic primer dries in 4-6 hours, alkyd - 12-24 hours, deep-penetrating - 2-4 hours. Consider drying time when planning your work.
For porous surfaces, increase the consumption rate to 0.12-0.15 l/m², add a margin of 15-20% to the usual calculation. Consider the possibility that a second coat may be necessary for highly porous surfaces.
A white primer is used before painting with light colors to avoid the dark surface showing through. The consumption is the same as for a regular primer - 0.1-0.12 l/m². It costs more than a colorless primer.
To make repairs, measure the area of walls or ceilings that need to be primed. Use the application rate depending on the type of primer. Add a margin of 10-15% for adjustment and possible defects.