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`PC = ( "LF" - "LI" )/ "LI" `

Enter a value for all fields

The **Percentage Change in Length **calculator computes the ratio of change in length from an initial length or distance to a final length or distance.

**INSTRUCTIONS:** Choose units and enter the following:

- (
**LI**) Initial Length - (
**LF**) Final Length

**Percent Change in Length (PC):** The calculator the percent change in length or distance.

The formula for percent change in length is:

PC = (LF - LI) / LI

where:

- PC is the percent change in length
- LF is the final length
- LI is the initial length