About this tool
About this tool
Convert a measured cup of water into emitter flow, runtime for your chosen volume, total use and complete reservoir cycles.
A practical tool, with a checkable method
This site is maintained as part of the Small Boss Calculator collection. It offers free calculators without an account in Traditional Chinese, English, Spanish and Hindi. Each guide explains the method, assumptions, worked examples and limits.
Calculations and data
Your numbers are processed only in this page’s browser memory. Refreshing restores the example. We do not ask for your name, payment details or uploaded files.
Checking a result
Compare the guide’s examples first, then check units and input conditions. Convert your measurements to the units shown beside each field. Display rounding does not change the underlying calculation.