1. What is a Flow Rate Through Pipe Calculator?

Definition: This calculator estimates the volumetric flow rate of a fluid through a circular pipe based on the pipe's radius and the fluid's velocity.

Purpose: It helps engineers, plumbers, and fluid system designers determine how much fluid passes through a pipe per unit time.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Volumetric flow rate (cubic meters per second)
• \( r \) — Pipe radius (meters)
• \( V \) — Fluid velocity (meters per second)
• \( \pi \) — Mathematical constant Pi (~3.14159)

Explanation: The cross-sectional area of the pipe (πr²) is multiplied by the fluid velocity to determine the volume passing through per second.

3. Importance of Flow Rate Calculation

Details: Accurate flow rate calculations are essential for proper pipe sizing, pump selection, and system design in plumbing, HVAC, and industrial applications.

4. Using the Calculator

Tips: Enter the pipe radius in meters and fluid velocity in meters per second. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Can I use diameter instead of radius?
A: Yes, just divide the diameter by 2 to get the radius before entering.

Q2: What units does this calculator use?
A: The calculator uses meters for radius, m/s for velocity, and outputs m³/s. You can convert as needed.

Q3: Does this work for non-circular pipes?
A: No, this formula is specific to circular pipes. Different formulas exist for rectangular or other shapes.

Q4: How do I measure fluid velocity?
A: Velocity can be measured with flow meters or calculated from pressure differences and pipe characteristics.

Q5: Does this account for friction or viscosity?
A: No, this is the theoretical maximum flow rate. Real systems will have lower rates due to friction and other factors.