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Gutter system calculation for roofs online

Roof type:

House characteristics
House length B: m
House width A: m
Eaves d1: m
Eaves d2: m
Height H: m
Height H2: m
Gutter system
Number of funnels: pcs


Our online roof drainage system calculator is designed to provide quick and accurate calculations for the efficient removal of rain and meltwater from your roof. By entering data about the roof area and type, you can determine the optimal diameter of downpipes and the required number of system components.

Steps to use the calculator:

  1. Select the method for calculating the roof area: calculate it online or manually enter the value.
  2. Specify the roof’s geometric characteristics (available types: gable, hipped, mansard, or flat).
  3. Choose the method for calculating the drainage system: either manually set the number of outlets or calculate it according to building standards.
  4. Click the "Calculate" button to get the results.

The calculation results include:

  • The number of downpipes and their optimal diameter.
  • The total length of gutters and the number of gutter brackets required.
  • The number of drain outlets and their brackets.
  • The number of gutter end caps, elbows, and bends for the downpipes.

The diameter of the drainage system is calculated based on the roof area and the climatic conditions of your region, ensuring efficient water removal and protecting the building structure from excess moisture.

To accurately determine the roof area, you can use our roof area calculator.

Our calculator will help you design a drainage system based on your roof area, allowing you to optimize costs and ensure reliable protection of your home from moisture.

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