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Earliest Finish Time Calculator

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Basic Formulas in Construction Planning and ManagementCritical Path Method ↺
✖Latest Finish Time is the latest time at which the activity can be completed without delaying the project.ⓘ Latest Finish Time [LFT]
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✖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%
✖Earliest Finish Time is the time of an activity that occurs if the activity starts at the earliest start time and takes an estimated time t to complete the activity.ⓘ Earliest Finish Time [EFT]
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Formula
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Earliest Finish Time

Formula
`"EFT" = "LFT"-"TF"_{"0"}`

Example
`"26d"="50d"-"24d"`

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Earliest Finish Time Solution

STEP 0: Pre-Calculation Summary
Formula Used
Earliest Finish Time = Latest Finish Time-Total Float
EFT = LFT-TF0
This formula uses 3 Variables
Variables Used
Earliest Finish Time - (Measured in Second) - Earliest Finish Time is the time of an activity that occurs if the activity starts at the earliest start time and takes an estimated time t to complete the activity.
Latest Finish Time - (Measured in Second) - Latest Finish Time is the latest time at which the activity can be completed without delaying the project.
Total Float - (Measured in Second) - Total float is the period by which an activity can shift its timing without affecting the relevant schedule completion date.
STEP 1: Convert Input(s) to Base Unit
Latest Finish Time: 50 Day --> 4320000 Second (Check conversion here)
Total Float: 24 Day --> 2073600 Second (Check conversion here)
STEP 2: Evaluate Formula
Substituting Input Values in Formula
EFT = LFT-TF0 --> 4320000-2073600
Evaluating ... ...
EFT = 2246400
STEP 3: Convert Result to Output's Unit
2246400 Second -->26 Day (Check conversion here)
FINAL ANSWER
26 Day <-- Earliest Finish Time
(Calculation completed in 00.004 seconds)
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Created by Rachana B V
The National Institute of Engineering (NIE), Mysuru
Rachana B V has created this Calculator and 3 more calculators!
Verified by Ayush Singh
Gautam Buddha University (GBU), Greater Noida
Ayush Singh has verified this Calculator and 50+ 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

Earliest Finish Time Formula

Earliest Finish Time = Latest Finish Time-Total Float
EFT = LFT-TF0

What is Float?

Float, sometimes called slack, is the amount of time an activity, network path, or project can be delayed from the early start without changing the completion date of the project.

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 Earliest Finish Time?

Earliest Finish Time calculator uses Earliest Finish Time = Latest Finish Time-Total Float to calculate the Earliest Finish Time, The Earliest Finish Time formula is defined as the earliest possible time a task or activity can be completed, considering its dependencies and constraints. Earliest Finish Time is denoted by EFT symbol.

How to calculate Earliest Finish Time using this online calculator? To use this online calculator for Earliest Finish Time, enter Latest Finish Time (LFT) & Total Float (TF0) and hit the calculate button. Here is how the Earliest Finish Time calculation can be explained with given input values -> 0.000301 = 4320000-2073600.

FAQ

What is Earliest Finish Time?
The Earliest Finish Time formula is defined as the earliest possible time a task or activity can be completed, considering its dependencies and constraints and is represented as EFT = LFT-TF0 or Earliest Finish Time = Latest Finish Time-Total Float. Latest Finish Time is the latest time at which the activity can be completed without delaying the project & Total float is the period by which an activity can shift its timing without affecting the relevant schedule completion date.
How to calculate Earliest Finish Time?
The Earliest Finish Time formula is defined as the earliest possible time a task or activity can be completed, considering its dependencies and constraints is calculated using Earliest Finish Time = Latest Finish Time-Total Float. To calculate Earliest Finish Time, you need Latest Finish Time (LFT) & Total Float (TF0). With our tool, you need to enter the respective value for Latest Finish Time & Total Float and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
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