CPM Float Calculator

Construction scheduling: early/late dates, total float, free float and the critical path. Results update as you type.

Activity

ID Name Duration (days) Predecessors

Predecessor format: A = finish-to-start · A:SS+2 = start-to-start with 2-day lag · A:FF-1 = finish-to-finish with 1-day lead · types FS, SS, FF, SF.

Project

Project start date 5-day work week (Mon–Fri)

Add activities or load the example.

ID	Name	Dur	Predecessors	ES	EF	LS	LF	TF	FF	Critical	Start date	Finish date

No activities yet.

Bar chart

CriticalActivityTotal float

CSV import / export

or open file

Columns: ID, Name, Duration, Predecessors. Export fills the box with full results; copy it and paste into Excel or save as a .csv file.