Physics

Coefficient of Discharge Calculator

Find the discharge coefficient from actual and theoretical flow.

Calculated Output

Discharge coefficient 0.8

Formula: Cd = actual ÷ theoretical

Step-by-Step Breakdown

1. Values used:

2. Actual flow = 0.008 m³/s

3. Theoretical flow = 0.01 m³/s

5. Discharge coefficient = Actual flow / Theoretical flow = 0.008 / 0.01 = 0.8

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The math behind it

Cd = actual flow ÷ theoretical flow, always between 0 and 1 for real orifices and nozzles.

8 of 10 L/s → Cd = 0.8.

Why is it less than 1?

Friction and flow contraction reduce the real discharge below the ideal value.