Pipe Size Calculator
Estimate a pipe diameter from flow, pressure and length.
About this tool
Results use the stated material, temperature and pressure-drop assumptions. Suggested sizes refer to internal diameter; verify the pipe maker’s actual internal diameter and fittings.
Copy the technical summary into your own email if needed. Directory links use the product category.
Frequently asked questions
Can I continue if I do not know a parameter?
Yes. Leave it blank or choose Not sure. The requirement remains available for a supplier to confirm; the tool does not invent a value.
Does this select a specific brand or model?
No. The result is a preliminary specification. Manufacturer links use public product categories; each supplier must confirm performance for your actual conditions.