Working browser tool
Rainwater Tank Collection Estimate
Estimate captured runoff from rainfall depth, roof area and loss factor.
Enter your values
Your inputs are processed locally. Review the method and limitations before relying on the estimate.
Your result
How does Rainwater Tank Collection Estimate work?
Estimate captured runoff from rainfall depth, roof area and loss factor.
Worked example
Example input: Collection area m² = 60; Rainfall event mm = 12; Collection efficiency percent = 75. With all other prefilled inputs unchanged, potentially captured litres is approximately 540. Change any input to recalculate your own scenario.
Frequently asked questions
Does the calculator use real-time data?
No. All values come from your entries; no external price, weather or regulatory data is fetched.
Should I use this result without checking?
No. Confirm input measurements, local circumstances and any equipment or legal requirements first.