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Detention Time Calculator
Hydraulic detention time of a tank or basin from volume and flow.
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Detention time
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Hydraulic detention time of a tank or basin from volume and flow.
Detention Time Estimator
Enter your numbers below for an instant estimate.
0
💡 Tip: t = V / Q.
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
Detention Quick Guide
Typical values for reference.
| Volume m3 | Flow m3/h | Time | |
|---|---|---|---|
| 500 | 50 | 10.00 hours | |
| 100 | 50 | 2.00 hours | |
| 2000 | 100 | 20.00 hours | |
| 30 | 60 | 0.50 hours | |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Detention Time Calculator FAQ
Answers to common questions about this calculator.
The average time water stays in a tank.
It controls settling and treatment.
1.5 to 4 hours.
Idealised, ignores short circuiting.