1. What is a Ft to psi Calculator?

Definition: This calculator converts water height in feet to pressure in pounds per square inch (psi).

Purpose: It helps engineers, plumbers, and technicians determine water pressure based on elevation head.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{psi} \) — Pressure in pounds per square inch (psi)
• \( h_{ft} \) — Height of water column in feet (ft)
• 0.433 — Conversion factor (psi per foot of water)

Explanation: The height of water is multiplied by 0.433 to convert to pressure in psi.

3. Importance of Pressure Calculation

Details: Accurate pressure calculations are essential for designing water systems, ensuring proper pump selection, and maintaining system safety.

4. Using the Calculator

Tips: Simply enter the water height in feet. The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is the conversion factor 0.433?
A: This comes from the weight of water (62.4 lb/ft³) divided by 144 (in²/ft²), resulting in 0.433 psi per foot of water.

Q2: Does this work for other liquids?
A: No, this is specific to water. For other liquids, multiply by their specific gravity.

Q3: Is temperature considered in this calculation?
A: No, this assumes standard conditions (4°C or 39.2°F water temperature).

Q4: How accurate is this calculation?
A: It's accurate for most practical purposes, but doesn't account for atmospheric pressure or elevation effects.

Q5: What's the pressure at 100 ft of water head?
A: Approximately 43.3 psi (100 × 0.433).