How it works
Estimate filling time at a constant flow rate with no leaks or outflow. Supply pressure changes can alter actual time.
time = volume/flow rate
Worked example
Show example inputs and result
Volume to fill: 1,000 · Constant flow rate: 20.
- Fill time
- 50 min
Questions and answers
Why are some results rounded?
Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.
Are my inputs sent to a server?
The calculator processes inputs in your browser. Its code does not send your values to a server.
Method reviewed: October 8, 2026 · Methods & accuracy