Water Tank PSI Calculator

Water Pressure Formula:

\[ P_{psi} = \frac{\rho \times g \times h}{6894.76} \]

Water Pressure (P_psi): psi

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is a Water Tank PSI Calculator?

Definition: This calculator estimates the water pressure at the bottom of a tank based on the water height, density, and gravity.

Purpose: It helps engineers, plumbers, and homeowners determine the static water pressure in tanks for proper system design and safety.

2. How Does the Calculator Work?

The calculator uses the hydrostatic pressure formula:

\[ P_{psi} = \frac{\rho \times g \times h}{6894.76} \]

Where:

\( P_{psi} \) — Water pressure (pounds per square inch)
\( \rho \) — Water density (kg/m³, default 1000)
\( g \) — Gravity (m/s², default 9.81)
\( h \) — Water height (meters)

Explanation: The formula calculates the pressure exerted by a column of water, converting from Pascals to PSI.

3. Importance of Water Pressure Calculation

Details: Proper pressure estimation ensures tank structural integrity, proper pump selection, and safe plumbing system operation.

4. Using the Calculator

Tips: Enter water density (default 1000 kg/m³), gravity (default 9.81 m/s²), and water height in meters. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is the result in PSI?
A: PSI (pounds per square inch) is the standard pressure unit used in plumbing and tank specifications in many countries.

Q2: Does temperature affect the calculation?
A: Yes, water density changes slightly with temperature, but the effect is minimal for most practical applications.

Q3: What's the 6894.76 conversion factor?
A: This converts Pascals (kg/m·s²) to PSI (1 PSI = 6894.76 Pascals).

Q4: Does this account for atmospheric pressure?
A: No, this calculates only the hydrostatic pressure. Total pressure would add atmospheric pressure (14.7 psi at sea level).

Q5: How does tank shape affect the pressure?
A: Hydrostatic pressure depends only on height, not tank shape or volume.