Time of Concentration Calculator

Calculate catchment time of concentration (Tc) using Kirpich, NRCS TR-55, and sheet/shallow concentrated flow methods for stormwater design.

2D stress state at a point. All stresses in MPa.

σx — Normal Stress X (MPa)
σy — Normal Stress Y (MPa)
τxy — Shear Stress (MPa)
⚙ Mechanical Note: Results are based on standard textbook formulas and ISO/AASHTO references. Always verify critical designs with applicable codes (ISO 898, AASHTO 1993, AISC, Eurocode 3) and a qualified engineer.
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How It Works

Calculate catchment time of concentration (Tc) using Kirpich, NRCS TR-55, and sheet/shallow concentrated flow methods for stormwater design

Each component has a specific meaning:

  • Kirpich — The kirpich recorded for the patient or scenario being assessed.
  • NRCS TR-55 — The nrcs tr-55 recorded for the patient or scenario being assessed.
  • Sheet/shallow concentrated flow methods — The sheet/shallow concentrated flow methods recorded for the patient or scenario being assessed.

Note: Interpret the time of concentration result against the clinical thresholds and context described above.

How to Use

Enter the Kirpich, NRCS TR-55, sheet/shallow concentrated flow methods for the patient or scenario you are assessing. Calculate catchment time of concentration (Tc) using Kirpich, NRCS TR-55, and sheet/shallow concentrated flow methods for stormwater design. Use the time of concentration result to inform your clinical assessment.

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