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The water pressure in PSI.
Well pump discharge pressure and municipal water pressure are both commonly specified in PSI.
Equivalent feet of head
115.3 ft of head
They open the calculator with your figures already in it
PSI to Feet of Head Calculator: 115 ft of head — shown in imperial, US market. The link sets both, so the result they see is the one on your screen.
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How this was calculated
Formula source(s)
- Water at 4 °C weighs 62.428 lb/ft³, so 1 psi supports 144 ÷ 62.428 = 2.3067 ft of column — the jobsite “2.31” is this figure rounded
Inputs used
- Pressure
- 50
What this calculation does not cover
- Head is counted from wherever the gauge is, not from the ground. A basement tank reading 50 psi converts to 115 ft, but a fixture 25 ft above that gauge has already spent 10.8 psi of it before a tap opens and sits at about 39 psi at rest. Read the pressure and the point you care about as a pair, or the converted figure describes a place nobody is showering in.
- A well or booster system does not hold one pressure, so a single converted figure describes one moment of the cycle. A 40/60 switch runs everything between 92 and 138 ft of head, and a sprinkler zone or top-floor shower that performs at cut-out can fade badly just before the pump restarts. Convert the cut-in pressure, not the cut-out one, when what you want is the worst the system will do.
Estimated cost — your price
This site holds no price list for this material — local prices vary too much to publish honestly. Enter your supplier's price and the result is costed with it.
Computed in your browser — nothing you enter is uploaded. Presented in US customary units and US trade terminology. Where a formula follows a published standard, that standard and its edition are cited beside it on this page; where none governs, the page says so. Local amendments override model codes — verify against the code in force where you build.
Sources checked 2026-09-06 · in the site-wide review of 2026-09-06 · v1.1.1
Regulatory standards & verification citations1
- Water at 4 °C weighs 62.428 lb/ft³, so 1 psi supports 144 ÷ 62.428 = 2.3067 ft of column — the jobsite “2.31” is this figure rounded
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