How to calculate radiator paint
With the arrival of winter, radiator maintenance and renovation have become the focus of many families. Recently, hot topics on the Internet about "painting radiators" mainly focus on how to calculate the amount of paint, choose the type of paint, and construction precautions. This article will combine the hot content of the past 10 days to provide you with a detailed analysis of the calculation method for radiator painting and provide a structured data reference.
1. Calculation method of paint consumption for radiator

The calculation of the amount of paint depends mainly on the surface area of the radiator and the coverage of the paint. Here are the specific steps:
| Calculation steps | Formula/Explanation |
|---|---|
| 1. Measure the surface area of the radiator | Length × width × number of pieces × 2 (front and rear sides) |
| 2. Determine paint coverage | Refer to the paint packaging label (usually 8-12㎡/L) |
| 3. Calculate total usage | Surface area ÷ coverage × number of coats (usually 2 coats) |
2. Paint type selection and dosage reference
According to recent hot discussions, special paint for radiators and high-temperature resistant paint are the mainstream choices. The following is a comparison of common paint dosages:
| Paint type | Unit price (yuan/L) | Coverage (㎡/L) | Applicable scenarios |
|---|---|---|---|
| Special paint for radiator | 80-120 | 10-12 | Routine home use |
| High temperature resistant metallic paint | 150-200 | 8-10 | High temperature environment or industrial use |
| Water-based environmentally friendly paint | 100-150 | 9-11 | Children’s rooms or those with high environmental requirements |
3. Construction precautions (summary of recent hot issues)
1.Surface treatment:Nearly 70% of netizens discussed that the surface of the radiator needs to be thoroughly cleaned before painting to remove rust and old paint.
2.Ambient temperature:The ambient temperature during construction should be higher than 5°C, otherwise it will affect the formation of the paint film.
3.Drying time:The interval between each coat should be at least 4 hours, and it is recommended to extend to 6-8 hours in winter.
4.Security protection:Maintain ventilation and wear a protective mask when using solvent-based paint.
4. Cost Estimation Cases
Take 10 standard radiators (single piece size 600mm×1000mm) as an example:
| Project | Calculation process | result |
|---|---|---|
| total surface area | 0.6×1×10×2=12㎡ | 12㎡ |
| Amount of paint (2 coats) | 12÷10×2=2.4L | About 2.5L |
| budget range | 2.5L×(80-200 yuan) | 200-500 yuan |
5. Answers to recent hotly discussed questions among netizens
1.Does the old paint need to be completely removed?
According to the latest tests by professional decoration bloggers, if the old paint is firmly attached, you only need to polish the surface; if it peels off, it needs to be completely removed.
2.How long does it take to use the heater after painting?
It is recommended to wait at least 48 hours for complete curing, and it is recommended to extend to 72 hours in low temperature environments.
3.Common misunderstandings in DIY construction:
A recent survey by a home furnishing platform showed that 63% of DIY failure cases were due to insufficient mixing of paint or application of paint too thickly.
Summary:The calculation of radiator painting needs to comprehensively consider the surface area, paint performance and construction environment. Scientific calculations can avoid material waste and achieve ideal renovation results. It is recommended to reserve 10% margin when purchasing paint to cope with losses, and give priority to special products from formal channels.
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