Enter the early finish days of the activity and the early start days of the successor activity into the calculator to determine the free float.

## Free Float Formula

The following formula is used to calculate the number of days of free float.

FF = EF – ES

- Where FF is the free float days
- EF is the early finish of the activity (days)
- ES is the early start of the successor activity (days)

## Free Float Definition

A free float is defined as the difference between the early finish date of an activity and the early start take of a subsequent activity.

## Free Float Example

How to calculate free float?

**First, determine the early finish.**Calculate how many days ahead of schedule an early finish would be.

**Next, determine the early start.**Calculate how many days ahead of schedule a subsequent activity could start.

**Finally, calculate the free float.**Using the formula, subtract the early start from the early finish to determine the free float.

## FAQ

**What is free float?**

Free float is a measure of the time that a scheduled activity can be delayed without interfering with the start of a subsequent activity.

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