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Float Consumption Calculator

Enter the total float and the delay for each affected activity. The calculator shows the float consumed, the float left and any delay beyond float, as a quick check before a full time impact analysis.

Activities and delaysEnter each affected activity with its total float before the event and the delay the event caused, in working or calendar days, the same unit throughout.
Activity Duration (d) Total float before event (d) Delay from event (d) Float consumed Float after event Delay beyond float Result Remove
Report preview
The download is this report at full width.
Planix EngineeringFloat Consumption Report
Project
Activities0in this analysis
Float before events0days, sum
Delay from events0days, sum
Float consumed0days, sum
Beyond float0activities
Largest beyond float0days, indicative EOT
No data
Enter activity data above.
Activity results

Delay beyond float is the delay minus the positive total float before the event. It indicates a possible delay to completion. It does not account for logic changes, concurrency, float ownership or mitigation, so check it against the updated programme before relying on it.

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Float consumption and delay exposure

Check how much float each delay event uses

You enter the activities affected by delay events, with the total float each had before the event and the delay the event caused. The calculator shows the float consumed, the float left, and any delay beyond float, which is an early indicator of delay to completion. It works on figures you type in. It does not read P6 or XER files.

How to use the float calculator

  1. Set up the reportEnter the project, contract form, data date and who prepared it.
  2. Take the float from the programmeFor each affected activity, read the total float from the programme update before the event.
  3. Enter the delayEnter the delay the event caused to that activity, in the same unit as the float.
  4. Review the resultEach activity shows float consumed, float after the event and any delay beyond float.
  5. ExportDownload the report as a PNG or export the table to Excel.

How the result is worked out

Only positive float can absorb a delay. Delay beyond float is the delay minus that float.

  • Delay less than float: absorbed, float remains
  • Delay equal to float: float used up, the activity is now critical
  • Delay more than float: the excess is delay beyond float
  • No float or negative float: all of the delay is beyond float
  • Several activities: the largest figure is shown, as delays on parallel paths do not add up

Terms used

Total float
How long an activity can be delayed before it delays project completion or a key milestone.
Float consumption
The part of the float used up by a delay.
Negative float
The schedule already shows the activity finishing later than a required date.
Critical path
The longest path through the programme. A delay to an activity on it delays completion.
Questions

Float consumption calculator FAQ

Short answers for planners, claims consultants and project controls teams.

Does it read Primavera P6 or XER files?

No. You type in the float and delay for each activity. To read float straight from an XER file, use the XER Viewer or the P6 Critical Path Finder, then enter the figures here.

Is my schedule data uploaded?

No. The calculations run in your browser. The last figures are kept in this browser's local storage so they are there when you come back, and Clear all removes them.

Is delay beyond float the same as an EOT entitlement?

No. It indicates a possible delay to completion. Entitlement depends on the contract, causation, concurrency, float ownership and the records, and should be shown with the updated programme.

Why is the largest figure shown, not the total?

Delays to activities on parallel paths overlap in time, so adding them would overstate the delay to completion. For events on the same path, take the float from the programme as it stood when each event happened.

Who should use this calculator?

Planners, claims consultants, project controls engineers and managers who need a quick check of float and delay exposure before a full time impact analysis.

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Built by Sajeeshkumar Sivan

Planning and project controls professional with 15 years on GCC building and infrastructure projects, working daily with Primavera P6 baselines, monthly updates and extension of time claims. Each Planix tool comes from that work.

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