KCalc.Roofing Cost Calculator
Use this roofing cost calculator to estimate material and labor cost based on roof area and unit pricing.
Formula: Area x Price per area x (1 + Waste%)
Example
Formula: Area x Price per area x (1 + Waste%) = 120 m2 x 12 per m2 x (1 + 10%) = 1584.00
Enter roofing area, unit price, and waste percentage to estimate cost.
Tip: Roofing waste is often 8–15% for cuts and ridges.
Step-by-step calculation
- Enter roof area and unit price.
- Add waste percentage for cuts and ridges.
- Calculate the total cost.
FAQ
- Does this include labor?
- No, material cost only.
- Which area should I use?
- Use the roofing area calculator to get accurate roof area.