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Resource Levelling Calculator

Work out resource levelling instantly with clear inputs, formula shown and shareable results.

About Resource Levelling Calculator

Resource levelling smooths peaks to fit available capacity, and where the peak exceeds availability the schedule must extend. Total effort divided by available resources gives the theoretical minimum levelled duration — the floor no amount of sequencing can beat.

Formulas

Average demand

Average demand = Total effort / Project duration

Levelled duration

Levelled duration = Total effort / Available resources

Worked example

With the default values below, Resource Levelling Calculator returns Duration after levelling of 80.0. Change any input above and every figure here is recalculated in your browser.

Inputs used

Total effort
640 person-days
Project duration
90 days
Peak resource demand
14
Resources available
8

Results

Duration after levelling
80.0
Average resource demand
7.11
Extension caused by levelling
0.0
Peak demand above availability
6.0

Step by step

  1. 1Values used
  2. 2Average demand
  3. 3Levelled duration
  4. 4Duration after levelling= 80.0
  5. 5Average resource demand= 7.11
  6. 6Extension caused by levelling= 0.0
  7. 7Peak demand above availability= 6.0

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

What is the difference between levelling and smoothing?

Levelling allows the end date to move to respect resource limits; smoothing keeps the end date and uses float to reduce peaks.

Why does the average demand matter?

Because if the average already exceeds availability, no sequencing helps — the project is under-resourced, not badly scheduled.

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Resource Levelling Calculator | Calcrivo