Home
Back
Rainwater Tank Volume Formula:
| From: | To: |
The rainwater tank calculation formula estimates the volume of water that can be collected from a given surface area during rainfall. It provides a practical way to determine appropriate tank size for rainwater harvesting systems.
The calculator uses the rainwater tank volume formula:
Where:
Explanation: The formula calculates the theoretical maximum water collection and applies a 90% efficiency factor to account for evaporation, spillage, and other losses in real-world systems.
Details: Accurate rainwater tank volume calculation is crucial for designing efficient water harvesting systems, ensuring adequate water storage, and optimizing water conservation efforts.
Tips: Enter collection area in square meters and rainfall in millimeters. All values must be valid positive numbers for accurate calculation.
Q1: Why is there a 0.9 efficiency factor?
A: The 0.9 factor accounts for typical system losses including evaporation, first flush diversion, and overflow during heavy rainfall events.
Q2: What is a typical collection area?
A: Collection area is usually the roof surface area that drains into the collection system, measured in square meters.
Q3: How accurate is this calculation?
A: This provides a good estimate for planning purposes, but actual collection may vary based on roof material, gutter efficiency, and local rainfall patterns.
Q4: Can this be used for commercial systems?
A: Yes, the same formula applies, though larger systems may require more detailed analysis of specific efficiency factors.
Q5: What's the relationship between mm rainfall and liters?
A: 1 mm of rainfall over 1 m² equals 1 liter of water, hence the direct relationship in the formula.