Enter the spindle RPM, the chip load, and the number of teeth into the Feed Rate Calculator. The calculator will evaluate the Feed Rate.

## Feed Rate Formula

The following formula is used to calculate the Feed Rate.

**FR = RPM * CL * #T**

- Where FR is the Feed Rate (in/min)
- RPM is the spindle RPM
- CL is the chip load
- #T is the number of teeth

## How to Calculate Feed Rate?

The following two example problems outline the steps and information needed to calculate the Feed Rate.

**Example Problem #1**

- First, determine the spindle RPM.
- The spindle RPM is calculated to be : 500.

- Next, determine the chip load.
- The chip load is measured to be: 30.

- Next, determine the number of teeth.
- The number of teeth is found to be: 60.

- Finally, calculate the Feed Rate using the formula above:

FR = RPM * CL * #T

The values provided above are inserted into the equation below and computed.

FR = 500 * 30 * 60 = 900,000 (in/min)

**Example Problem #2**

The variables required for this problem are provided below:

spindle RPM = 600

chip load = 10

number of teeth = 20

Test your knowledge using the equation and check your answer with the calculator.

FR = RPM * CL * #T =** **(in/min)