Whether hiring a painter or painting yourself, planning the budget and calculating the amount of paint is essential. Besides choosing the right shade, knowing “how many square meters can 1 bucket of paint cover?” will help you estimate costs accurately, so you don’t have to worry about running out of paint midway (not enough paint) or buying too much. Additionally, it helps plan labor costs, material costs, and equipment costs effectively, especially in an era where construction material prices are continuously adjusting. This article will introduce you to how to calculate house painting costs, techniques for calculating the amount of paint needed, and updates on painter labor costs, along with tips for choosing colors that are cost-effective and suitable for homes in Thailand’s climate.
How much budget is needed to calculate house painting costs?
Painting a house or renovating a room can start from a few hundred baht to several million baht, depending on three factors that determine whether painting costs are low or high: the cost of paint and the cost of hiring a painter (labor cost for painting) Let’s take a look at how these costs are calculated in the current market and how much money you need to prepare.
1. Cost of paint
The cost of paint here refers to the total cost of all paint products we need, including topcoat (the outermost layer),primer, and surface repair products, which depend on the type of paint, the area to be painted, and the amount of paint required.
Generally, the type of topcoat commonly used for exterior or interior cement walls is acrylic paint. The advantages of this type of paint are that it dries quickly, has a mild odor, and is durable against various environmental conditions. Typically, we categorize paint by usage grade; the higher the grade, the more durable it is, with additional special properties and a higher price. Friends should consider their needs as well.
- Ultra-premium grade house paintis the highest grade, with a durability of 15 years, starting at 550 baht.*
- Premium grade house painthas a durability of 10 years, starting at 400 baht.*
- Standard grade house painthas a durability of 7 – 9 years, starting at 300 baht.*
- Economy Grade House Painthas a durability of 3 – 5 years, starting at 200 Baht*
*Average approximate price of various grades of house paint, size 1 gallon (excluding mixing costs). Prices may vary by product model and retail store.
As for primers and surface repair products, they are just as essential as topcoat paint. Whether it’s a new or old house, preparing the surface and repairing problematic areas before painting is necessary, and always applying a primer according to the system to prevent potential future paint issues and to help the topcoat adhere better and last longer.
- Old cement primer starts at 400 Baht*
- New cement primer starts at 500 Baht*
- Multipurpose cement primer (suitable for both old and new cement) starts at 500 Baht*
*Average approximate price of various types of cement primers, size 1 gallon. Prices may vary by product model and retail store.
Next, once we know which paint products we need, what grade of paint, and what type of primer, the next thing we need to find out is the size of the wall area we will be painting. How many square meters of area do we have so that we can use this information to purchase the right amount of paint for the area, without excess or shortage? This is because each type of paint product has different coverage properties and the number of coats required. The method to calculate the painting area and the amount of paint used can be done as follows:
How to calculate the painting area
The calculation method is divided into measuring the area of the exterior and interior walls. Simply remember that the wall you will paint must be included in the calculation! For exterior walls, measure or estimate the area around the house roughly. If it’s a detached house, you can calculate it using this formula (in the case of a semi-detached house or townhouse, the wall that is adjacent to the neighbor does not need to be included in the calculation (because it’s the neighbor’s area).
(Width x Height) plus (Back Width x Height)plus (Left Depth x Height) Add (right depth x height)
How much you get, take it.delete With The area of windows and doors
Similarly, the calculation of the interior wall area also uses the method Combine the wall areas that need to be painted (width x height). thendeleteWith Window and door areas For the ceiling, please take it. Width x Length
How to calculate the actual amount of paint needed.
Once we have the size of the painting area in square meters, we can now calculate the amount of paint needed. Generally,Exterior paint, interior paint, old cement primer, new cement primer, can size 1 gallon (approximately 3 liters) It will support coverage of approximately 30 square meters One trip
Therefore, the calculation formula is “Total area (square meters) divided by 30 “ You will get the answer on how many gallons of paint you need to use.But wait!!This formula is only applicable when we paint just one coat, but for those who want to paint using a standard system,You should apply the topcoat (finish coat) at least 2 times and apply the primer at least 1 time.
Therefore, the actual calculation formula for the topcoat color may need to be multiplied by 2 or 3 (in the case of wanting to apply it 3 times). Speaking like this, friends might start to get a headache. No worries, just take a look at the following example.
Example: A house has a total exterior wall area of 300 square meters for painting.
According to the formula, 1 gallon of paint will cover an area of approximately 30 square meters. Therefore, for an area of 300 square meters, we will need a total of paint primer.10 gallonsAnd if we assume that we will paint over the surface (which means the actual color we want, such as blue, purple, pink, green, etc.) according to the 2-coat system, we will useExterior paintAll goods20 gallonsThat is for the calculation of quantity.Interior paintYou can use the same principle, or if it’s easier, you can click the button below to calculate the amount of paint needed.
After obtaining the number of gallons, multiply it by the price of the topcoat and primer to get the price for the specific paint products you need. If you have surface repair products, be sure to add those costs as well. However, one thing to be cautious about is that each paint model may have different coverage areas, and paints with different shades may not have the same price. Therefore, these factors could lead to the paint price being lower or higher.
Useful Tips: When going to the paint store to buy paint, be sure to mention the size of the area of ” Wall“Don’t mention the area of the room or the area of the house, okay? And importantly, if the calculation shows that a large quantity is needed, buying paint in large containers, such as a 2.5-gallon bucket or a 5-gallon bucket, will help reduce the cost of the paint.”
Therefore, 1 bucket of paint can cover approximately 30 – 35 square meters.
2. Painting cost (painter’s fee)
In cases where there are no workers available or you do not wish to paint yourself. Hiring a painting contractor is the best option because our contractors or company will provide a cost estimate, allowing us to know immediately how much we will need to pay without having to calculate the room size or buy paint ourselves with excess or shortage. Typically, contractors charge based on the painting area. According to the latest survey in 2022 the labor cost for painting is around 50 – 180 baht/square meter which may include only labor costs without paint.
However, many companies now offer package deals for painting services that include the service fee, site survey costs, equipment costs, and paint product costs. You just need to tell them the size of the room you want to paint.
- The package price for interior painting services starts at 11,900 baht*
- The package price for exterior painting services starts at 15,900 baht**
*Estimated price for a minimum area of 10 square meters and up **Estimated price for a house width of 5 square meters and up
Additionally, if you use painting contractor services, there may be other costs such as site survey fees to assess the area before painting, or in the case ofexterior paintingthere may be scaffold setup fees as well. Before painting, be sure to ask the painter or painting contractor about the conditions. The scaffold setup fee typically starts at around 10,000 baht.
Finally, once you calculate the paint cost and labor cost, you can combine both to get the total painting cost for this time. However, if your calculations exceed the budget you set, you might consider asking the painter to downgrade the quality of the paint as well.
If anyone is still confused, you can check out the video on how to easily calculate the amount of paint needed for your house by yourself below.
