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Restaurant Seat Utilisation Calculator

Work out restaurant seat utilisation instantly with clear inputs, formula shown and shareable results.

About Restaurant Seat Utilisation Calculator

Seat utilisation measures occupied seat minutes against available seat minutes. Table mix efficiency explains much of any shortfall: a room set mainly in fours serving an average party of 2.6 can only ever fill about 65% of its seats, before any question of demand arises.

Formulas

Available seat minutes

Available = Seats x Service hours x 60

Seat utilisation

Utilisation % = Occupied seat minutes / Available seat minutes x 100

Table mix efficiency

Efficiency % = min(100, Average party size / 4 seats x 100)

Worked example

With the default values below, Restaurant Seat Utilisation Calculator returns Seat utilisation of 66.67%. Change any input above and every figure here is recalculated in your browser.

Inputs used

Total seats
90
Occupied seat minutes in the service
21,600
Service hours
6
Average party size
2.6

Results

Seat utilisation
66.67%
Table mix efficiency at four-seat tables
65.00%
Available seat minutes
32,400
Empty seat minutes
10,800

Step by step

  1. 1Values used
  2. 2Available seat minutes
  3. 3Seat utilisation
  4. 4Table mix efficiency
  5. 5Seat utilisation= 66.67
  6. 6Table mix efficiency at four-seat tables= 65.00
  7. 7Available seat minutes= 32,400
  8. 8Empty seat minutes= 10,800

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 utilisation is achievable?

65-80% during a busy service is strong. Above 85% usually means guests are being rushed or queueing outside.

How does table mix affect it?

A room set mainly in fours serving mainly parties of two loses a quarter of its seat capacity before service even begins.

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