Pressure tank calculator
What size pressure tank do I need?
Tanks are sold by total gallons, but what you get between pump cycles is drawdown, a fraction of the total. Size by drawdown so the pump gets a long enough run each cycle.
Enter your pump’s flow rate.
Not sure the tank is the problem? Run Pressure Fix first. A leaking check valve can look like a bad tank, so check before you buy one.
This tool offers general guidance based on published industry sources. It is not professional plumbing or well-service advice, and it can’t see your actual system. Follow your equipment manufacturer’s manual where you have it, and when in doubt (especially around electricity, pressure vessels, or anything urgent) stop and call a licensed professional.