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CV Flow Calculator
Valve flow coefficient (Cv) from flow rate and pressure drop for water.
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Required Cv
Compare Your Options And Get Clear Answers
Valve flow coefficient (Cv) from flow rate and pressure drop for water.
CV Flow Estimator
Enter your numbers below for an instant estimate.
0
💡 Tip: Cv = Q sqrt(SG / dP).
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
CV Quick Guide
Typical values for reference.
| Flow gpm | dP psi | Cv | Cv |
|---|---|---|---|
| 50 | 4 | 25.00 | 125.00 |
| 10 | 2 | 7.07 | 18.80 |
| 100 | 5 | 44.72 | 299.07 |
| 25 | 10 | 7.91 | 22.23 |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
CV Flow Calculator FAQ
Answers to common questions about this calculator.
The flow in US gpm of water that gives a 1 psi drop.
Pick one with Cv above the calculated value.
The metric equivalent, Kv = 0.865 Cv.
Not with this formula.