📌 3-Minute Summary
✔ Wallpaper estimates are not based only on your apartment size.
✔ Professional installers calculate the wall area, ceiling, doors, windows, wallpaper type, and job conditions.
✔ With a floor plan and a simple calculator, you can estimate the wallpaper area yourself.
Why Is the Wallpaper Area Different from My Apartment Size?
Many homeowners ask this question:
"My apartment is 34 pyeong. Doesn't that mean I need 34 pyeong of wallpaper?"
The answer is No.
Apartment size refers to the floor area.
Wallpaper installation is calculated using the wall surface area (and sometimes the ceiling).
That's why a 34-pyeong apartment may require wallpaper for 40–50 pyeong of wall surface.
Step 1. Measure the Room
Let's use Bedroom 3 from the example floor plan.
Dimensions:
- Width: 4.54 m
- Length: 3.61 m
- Wall Height: 2.30 m
Step 2. Calculate the Total Wall Area
The basic formula is: (Width + Length) × 2 × Wall Height
Example: (4.54 + 3.61) × 2 × 2.30 = 37.49㎡
This is the total wall surface area before subtracting doors and windows.
Step 3. Subtract the Door Area
Door size: 0.87 × 2.10 = 1.83㎡
Step 4. Subtract the Window Area
Window size: 2.99 × 2.47 = 7.39㎡
Step 5. Final Wallpaper Area
37.49㎡ − 1.83㎡ − 7.39㎡ = 28.27㎡
Convert to Korean pyeong: 28.27 ÷ 3.3058 ≈ 8.55 pyeong
Bedroom 3 requires approximately 28.27㎡ (8.55 pyeong) of wallpaper.
<!doctype html>
도배 평수 계산기
문
창문
장판 평수 계산기
벽지 롤 수 계산기
도배 예상 견적 계산기
🧮 Try the Wallpaper Calculator
Instead of calculating everything manually, simply enter:
- Room width
- Room length
- Wall height
- Door dimensions
- Window dimensions
The calculator will automatically display:
- Total wall area
- Door area
- Window area
- Net wallpaper area (㎡)
- Wallpaper area (Pyeong)
👇 Click the calculator below to estimate your room.
Should the Ceiling Be Included?
If the ceiling will also be covered with wallpaper, calculate it separately:
Width × LengthExample:
4.50 × 3.50
= 15.75㎡Then add it to the wall area.
Wallpaper Type Also Affects the Estimate
Common wallpaper types in Korea include:
| Silk Wallpaper (PVC/Vinyl) | Durable, washable, premium finish |
| Paper Wallpaper | Affordable and economical |
Material choice affects both material costs and labor costs.
What Else Affects the Final Estimate?
Professional installers also consider:
- Ceiling installation
- Mold removal
- Removing old wallpaper
- Wall repair (putty work)
- Built-in furniture
- Accent walls and tile surfaces
- Large windows
- Furniture moving
- Overall installation difficulty
These factors can significantly change the final quotation.
Example Cost for a 34-Pyeong Apartment
| Paper Wallpaper | ₩2,500,000 – ₩3,200,000 |
| Silk Wallpaper | ₩3,500,000 – ₩4,500,000 |
| Premium Wallpaper | ₩4,500,000 – ₩6,500,000 |
Note: These are general examples. Actual prices vary depending on the wallpaper brand, room condition, labor, region, and installation scope.
Real Installation Experience
One of the questions we hear most often is:
"Can I get a quotation over the phone?"
A rough estimate is possible.
However, if you provide a floor plan or room measurements, the estimate becomes much more accurate.
Adding photos of the walls can improve accuracy even further.
Frequently Asked Questions
Can I estimate wallpaper costs using only my apartment size?
You can get a rough estimate, but a floor plan or room measurements provide much better accuracy.
Do I always need to wallpaper the ceiling?
No.
If the ceiling is in good condition, many homeowners choose to wallpaper only the walls.
Why is the calculator different from an actual quotation?
The calculator estimates the wallpaper area only.
Professional quotations also include wallpaper type, labor, wall condition, repair work, and other site-specific factors.
Related Articles
- How to Calculate Wallpaper Area
- Silk Wallpaper vs. Paper Wallpaper
- Why Do Koreans Replace Wallpaper When Moving?
- Can Moldy Wallpaper Be Solved by Replacing Wallpaper?
- DIY Wallpaper vs. Professional Installation
Conclusion
Wallpaper estimates are not based solely on apartment size.
Professional installers calculate wall area, subtract doors and windows, consider ceiling coverage, and evaluate site conditions before preparing a quotation.
With the floor plan infographic and the interactive wallpaper calculator, you can estimate your wallpaper installation area more accurately before requesting a professional quote.
📌 Interior Wallpaper Lab Korea
Based on real installation experience in Korea, we share practical information about:
- Wallpaper Installation
- Wallpaper Area Calculation
- Interior Renovation
- Vinyl Flooring
- Home Remodeling
- Professional Cost Estimation
New articles are published regularly.