Free online downspout (leader) dimensions and quantity calculator
Based upon the roof area, this downspout calculator estimates how many downspouts (leaders) of certain dimensions (x*y or diameter) is necessary.
As the decimal separator, use please only the DOT! Using the COMMA, you will get wrong results!
THIS DOWNSPOUTS CALCULATOR IS FOR INFORMATIONAL PURPOSES ONLY. It DOES NOT CALCULATE THE RAIN GUTTERS DIMENSIONS (rain gutters must be calculated and designed separately) and using it, you understand that the results it provides can be inaccurate and must always be discussed with contractor company responsible for the gutters and downspouts installation.
Calculator covers following downspout dimensions (x*y or diameter)
- 2"x3" rectangular leader;
- 3"x4" rectangular leader;
- 4"x5" rectangular leader;
- 5"x6" rectangular leader;
- 2" round leader;
- 3" round leader;
- 4" round leader;
- 5" round leader;
- 6" round leader.
