Free Float used in CPM Calculator

✖Total float is the period by which an activity can shift its timing without affecting the relevant schedule completion date.ⓘ Total Float [TF₀]			+10% -10%
✖Slack of an Event in a network is the difference between the latest event time and the earliest event time at its terminal point or node.ⓘ Slack of an Event [S]			+10% -10%

✖Free Float is the period by which an activity can shift in its timing without affecting the early start of any succeeding activity or event.ⓘ Free Float used in CPM [FF₀]

⎘ Copy

👎

Formula

✖

Free Float used in CPM

Formula

`"FF"_{"0"} = "TF"_{"0"}-"S"`

Example

`"18d"="24d"-"6.0d"`

Calculator

LaTeX

Reset

👍

Download Basic Formulas in Construction Planning and Management Formulas PDF

Free Float used in CPM Solution

STEP 0: Pre-Calculation Summary

Formula Used

Free Float = Total Float-Slack of an Event
FF₀ = TF₀-S
This formula uses 3 Variables

Variables Used

Free Float - (Measured in Day) - Free Float is the period by which an activity can shift in its timing without affecting the early start of any succeeding activity or event.
Total Float - (Measured in Day) - Total float is the period by which an activity can shift its timing without affecting the relevant schedule completion date.
Slack of an Event - (Measured in Day) - Slack of an Event in a network is the difference between the latest event time and the earliest event time at its terminal point or node.

STEP 1: Convert Input(s) to Base Unit

Total Float: 24 Day --> 24 Day No Conversion Required
Slack of an Event: 6 Day --> 6 Day No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

FF₀ = TF₀-S --> 24-6

Evaluating ... ...

FF₀ = 18

STEP 3: Convert Result to Output's Unit

1555200 Second -->18 Day (Check conversion here)

FINAL ANSWER

18 Day <-- Free Float

(Calculation completed in 00.004 seconds)

You are here -

Home » Engineering » Civil » Construction Practice, Planning and Management » Basic Formulas in Construction Planning and Management » Critical Path Method » Free Float used in CPM

Credits

Created by Chandana P Dev

NSS College of Engineering (NSSCE), Palakkad

Chandana P Dev has created this Calculator and 500+ more calculators!

Verified by Mithila Muthamma PA

Coorg Institute of Technology (CIT), Coorg

Mithila Muthamma PA has verified this Calculator and 700+ more calculators!

< 10+ Critical Path Method Calculators

Earliest Finish Time

Go Earliest Finish Time = Latest Finish Time-Total Float

Total Float in CPM

Go Total Float = Latest Finish Time-Earliest Finish Time

Latest Finish Time

Go Latest Finish Time = Total Float+Earliest Finish Time

Slack of Event given Independent Float

Go Slack of an Event = Free Float-Independent Float

Free Float given Indenpendent Float

Go Free Float = Independent Float+Slack of an Event

Independent Float used in CPM

Go Independent Float = Free Float-Slack of an Event

Total Float given Free Float

Go Total Float = Free Float+Slack of an Event

Free Float used in CPM

Go Free Float = Total Float-Slack of an Event

Slack of Event in CPM

Go Slack of an Event = Total Float-Free Float

Interfering Float

Go Interfering Float = Total Float-Free Float

Free Float used in CPM Formula

Free Float = Total Float-Slack of an Event
FF₀ = TF₀-S

What is Free Float?

Free Float, per definition, is the amount of time that the activity can be delayed before any successors will be delayed. Early Start/Finish times are used to calculate the Free Float values.

What is Slack?

The Slack time for an activity is the time between its earliest and latest start time, or between its earliest and latest finish time. Slack is the amount of time that an activity can be delayed past its earliest start or earliest finish without delaying the project.

How to Calculate Free Float used in CPM?

Free Float used in CPM calculator uses Free Float = Total Float-Slack of an Event to calculate the Free Float, The Free Float used in CPM formula is defined as the time or duration by which any activity can be delayed without delaying other succeeding activities. The slack mentioned can be head event slack (earliest time of j-i). Free Float is denoted by FF₀ symbol.

How to calculate Free Float used in CPM using this online calculator? To use this online calculator for Free Float used in CPM, enter Total Float (TF₀) & Slack of an Event (S) and hit the calculate button. Here is how the Free Float used in CPM calculation can be explained with given input values -> 0.000208 = 2073600-518400.

FAQ

What is Free Float used in CPM?

The Free Float used in CPM formula is defined as the time or duration by which any activity can be delayed without delaying other succeeding activities. The slack mentioned can be head event slack (earliest time of j-i) and is represented as FF₀ = TF₀-S or Free Float = Total Float-Slack of an Event. Total float is the period by which an activity can shift its timing without affecting the relevant schedule completion date & Slack of an Event in a network is the difference between the latest event time and the earliest event time at its terminal point or node.

How to calculate Free Float used in CPM?

The Free Float used in CPM formula is defined as the time or duration by which any activity can be delayed without delaying other succeeding activities. The slack mentioned can be head event slack (earliest time of j-i) is calculated using Free Float = Total Float-Slack of an Event. To calculate Free Float used in CPM, you need Total Float (TF₀) & Slack of an Event (S). With our tool, you need to enter the respective value for Total Float & Slack of an Event and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Free Float?

In this formula, Free Float uses Total Float & Slack of an Event. We can use 1 other way(s) to calculate the same, which is/are as follows -

Free Float = Independent Float+Slack of an Event

Home

FREE PDFs

🔍 Search