Enter the height of the wall, width of the building, and the pitch angle of the roof into the calculator to determine the ridge height. This calculator can also evaluate any of the variables given the others are known.

Ridge Height Formula

The following formula is used to calculate the ridge height in a roof construction.

RH = H + (W / 2) * tan(A)


  • RH is the ridge height H is the height of the wall W is the width of the building A is the pitch angle of the roof

To calculate the ridge height, divide the width of the building by 2 and multiply the result by the tangent of the pitch angle of the roof. Add this result to the height of the wall.

What is a Ridge Height?

A ridge height refers to the measurement from the base of a building to the highest point of its roof, typically the peak of the roof’s ridge. This measurement is often used in building regulations to ensure structures do not exceed a certain height, and it can also impact aspects like wind resistance and drainage.

How to Calculate Ridge Height?

The following steps outline how to calculate the Ridge Height using the given formula:

  1. First, determine the height of the wall (H).
  2. Next, determine the width of the building (W).
  3. Next, determine the pitch angle of the roof (A).
  4. Next, substitute the values of H, W, and A into the formula: RH = H + (W / 2) * tan(A).
  5. Finally, calculate the Ridge Height (RH).
  6. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem:

Use the following variables as an example problem to test your knowledge:

Height of the wall (H) = 10 ft

Width of the building (W) = 30 ft

Pitch angle of the roof (A) = 30 degrees