Time of Concentration

Calculate time of concentration using multiple methods.

Linear measurement in the specified unit.
ft
Age in the specified unit (typically years).
%
Numerical input for the calculation.
Enter the 2-yr rainfall value for this calculation.
in

Results

Tc (Kirpich):
Calculated tc (kirpich) based on your inputs.
-min
Tc (FAA):
Calculated tc (faa) based on your inputs.
-min
Average Tc:
Calculated average value.
-min
Reference: AWWA/EPA Standards. Hydrology methods.