Hydraulic Retention Time Calculator
Calculate HRT and evaluate tank sizing for wastewater treatment
Tank Parameters
HRT Formula
HRT = Tank Volume / Flow Rate
Hydraulic Retention Time
12.00 hours
Above Recommended Range
HRT Conversions
Minutes720.0 min
Hours12.00 hrs
Days0.500 days
Aeration Tank Guidelines
Recommended Range4 - 8 hours
Optimal Volume2500 m3
Volume Difference-2500 m3
Loading Rates
Flow Rate10000 m3/day
Surface Loading6.00 m3/m2/day
Overflow Rate6.00 m/day
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.