Example: Supply-side pressure: 0.35 in wc · Return-side pressure: 0.25 in wc → Total external static pressure: 0.6 in wc.
Status: High — check filter & ducts
Frequently asked questions
How do I calculate static pressure? Enter your numbers above and the result updates instantly. For example: Supply-side pressure: 0.35 in wc · Return-side pressure: 0.25 in wc → Total external static pressure: 0.6 in wc.
Is this Static Pressure Calculator free? Yes — completely free with no sign-up or paywall. It runs entirely in your browser and keeps working offline; the numbers you enter never leave your device.
How accurate is it? It uses the standard published formula for static pressure. Results are estimates for planning — not financial, tax, medical, engineering, or legal advice.