# Flow Rate Calculator

The Flow Rate Calculator is a free tool that calculates a fluid's flow rate based on its diameter and velocity. To easily compute the flow rate, simply enter the diameter and velocity in the appropriate input sections and press the calculate button.

### What is Flow Rate?

When we talk about flow rate, we're usually referring to volumetric flow rate. The volumetric flow rate is the volume of a fluid that travels through a certain cross-sectional area per unit of time. The symbol Q, and at times V-V, stands for Volumetric Flow Rate. V/t = Volumetric Flow Rate

Another Flow Rate notion is Mass Flow Rate, sometimes known as Mass Current. It is the mass that goes through a particular cross-sectional area in a given amount of time in this situation. = m/t = mass/time

### Flow Rate Formula

**Volumetric Flow Rate:** To calculate the Volumetric Flow Rate, first determine the volume of a piece of the fluid in the channel. Volume = A*I, where A is the fluid's cross-sectional area and I is the breadth of a specific fluid segment. The Volumetric Flow Rate Equation is obtained by substituting the volume in the Flow Rate Formula. V / t = A * I / t

We refer to I/t as flow velocity because it is the volume length divided by time. As a result, the formula for the volumetric flow rate is A * v. Because the majority of pipes are cylindrical, the equation for Volumetric Flow Rate will be Volumetric flow rate for cylindrical pipe = π * (d/2)² * v, where d is the pipe's diameter. This equation can even be rearranged to determine the pipe velocity.

**Mass Flow Rate:** To determine the mass rate formula, we must first recall the density definition, i.e. = m / V, which we may rewrite as m = *V. The mass of a material passing per unit time is known as mass flow rate. Mass flow rate = m / t = ρ * V / t = ρ * Volumetric flow rate = ρ * A * v. As a result, Mass Flow Rate = ρ * A * v

For more concepts check out physicscalculatorpro.com to get quick answers by using this free tool.

### Flow Rate Examples

**Question 1:** Calculate the flow rate of a fluid that is travelling at 50 m/s and has a diameter of 0.04m.

**Solution:**

Given:

Velocity = 50 m/s

Diameter = 0.04m

Volumetric flow rate = π * (d/2)² * v

Volumetric Flow Rate = π * (0.04/2)² * 50 = 0.0628 Cubic Meter Per Second(m³/s)

### FAQs on Flow Rate Calculator

**1. What is the average flow rate?**

At 32°F, the normal flow rate is 1 atmosphere (101.3 kPa) or 14.696 psi (0 0C). The volume of fluid that travels at a specific site at a certain pressure and temperature is referred to as the actual flow rate.

**2. How can you find out how much water is flowing via a pipe?**

The square root of 4 times the flow rate divided by pi times velocity is the equation for pipe diameter.

**3. What is the formula for calculating the flow rate via a filter?**

To get the volumetric flow rate in gallons per minute, multiply the filter's surface area by the velocity of the water passing through it.

**4. Does the size of the pipe have an impact on the flow rate?**

Flow velocity is inversely proportional to the pipe's t cross-sectional area at any given flow rate. Smaller pipes will result in faster flow rates, while larger pipes will result in slower flow speeds.

**5. What is the definition of air flow rate?**

The actual volume of air moving through the device per unit of time, stated in cubic feet per minute, to three significant numbers, is referred to as the airflow rate.

**6. Is the flow rate affected by the radius?**

No. When the diameter of the pipe is increased, the flow rate/discharge increases. The square of the volumetric flow rate, given by the Bernoullis principle, is proportional to the diameter to the fifth divided by the friction factor for a given pressure drop, mass density, and effective length.