Moody Chart Friction Factor Calculator

Solve the Colebrook equation: 1/√f = −2 log(ε/(3.7D) + 2.51/(Re√f)). Or use the explicit Swamee-Jain formula: f = 0.25/[log(ε/(3.7D) + 5.74/Re^0.9)]² for turbulent flow.

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 to Use

Enter the values for the patient or scenario you are assessing. Solve the Colebrook equation: 1/√f = −2 log(ε/(3.7D) + 2.51/(Re√f)). Or use the explicit Swamee-Jain formula: f = 0.25/[log(ε/(3.7D) + 5.74/Re^0.9)]² for turbulent flow. Use the moody friction factor result to inform your clinical assessment.

Frequently Asked Questions