Water Pressure (Head Height to PSI)
PSI = ft of head × 0.433. Or 1 PSI = 2.31 ft of water column.
Result
Pressure
43.30 psi
2.985 bar.
- Head height (ft)100.00
- Pressure (psi)43.300
- Pressure (bar)2.9854
- Pressure (kPa)298.55
- Pressure (mmHg)2,239.3
Step-by-step
- 1 ft water column = 0.433 psi.
- psi = 100 × 0.433 = 43.300.
How to use this calculator
- Pick direction.
- Enter value.
About this calculator
Water pressure from gravity head: 0.433 psi per foot of vertical column (water density × g × ft). 100 ft elevation tank = 43.3 psi at ground level. Conversely, your home water pressure (50-80 psi typical) corresponds to 115-185 ft equivalent head. Garden hose at street pressure 60 psi = 138 ft virtual height — useful for sprinkler design and water-tower sizing.
Frequently asked
Density of water (62.4 lb/ft³) × 1 ft × (1/144 in²/ft²) = 0.4333 psi.
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Pressure psi ↔ bar
1 bar = 14.5038 psi = 100 kPa = 0.987 atm.