Coefficient of Discharge Calculator

Find the discharge coefficient from actual and theoretical flow.

Discharge coefficient 0.8

Formula: Cd = actual ÷ theoretical

Step-by-step with your numbers:

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

Did we solve your problem today?

The discharge coefficient corrects ideal flow predictions for real losses.

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.