# Calculating Picks Per Inch (PPI)

 Set from Len and Pick Counter 1: Measure the fabric that has been

Actual picks per inch can be calculated by weaving a known length and dividing the picks woven by that length in inches.   To access the Calc PPI function, first click Length option on the Project Progress screen. 

<figure><img src="/files/xSDqel5rDiF7AW5HhUZv" alt="" width="220"><figcaption><p>Choose Length form Project Progress Screen</p></figcaption></figure>

To have TempoWeave calculate actual picks per inch, first click into the PPI field as shown below (this is on the Project Progress | Length screen).

<figure><img src="/files/FFt57JFqBnR9JWr7vOkU" alt="" width="375"><figcaption><p>Click into the PPI field</p></figcaption></figure>

Three options are shown.  1) Set PPI manually 2) Set from Length and Pick 1 and 3) Set from Length andn Pick 2

<figure><img src="/files/oyWlMnFKKzpqTNHnBBHT" alt="" width="375"><figcaption><p>Next Choose Set from Length and Pick 1</p></figcaption></figure>

If setting manually, you simply enter the picks per inch.  To have TempoTreadle calculate the PPI for you, enter a length in inches and the calculation will be the pick counter divided by the length.

After clicking Set from Len & Pick 1, you will need to enter the Length (in inches) on the screen keyboard.  Then after pressing Enter, the calculated PPI will be shown on the Woven Length Screen.&#x20;

For now on, the length calculations on the Project Progress screem will use this PPI value to calulate the woven length.&#x20;

* **Note - when starting a new warp, you may want to reset one of the pick counters to 0, place a small string in the edge of the shed and weave a few inches before having the calculation performed.**  \*

The following example shows the woven length (in yards and inches) based on the PPI.  Note that the length is shown for two pick counters, as well as an interval pick counter. Usually, just pick counter 1 is used.

<figure><img src="/files/85Cx0e56A1vHAVqLrwRe" alt="" width="375"><figcaption><p>Woven Length Information</p></figcaption></figure>


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