People attached to the same location and planning period.
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Desk-sharing ratio calculator
Estimate peak attendance, desks required, and the employee-to-desk ratio from office frequency, weekday concentration, unusable inventory, and a visible planning buffer.
No accountInputs stay in this tab
Estimated desks required74
A planning scenario, not a universal capacity benchmark. Validate it against each weekday, location, workstation type, and pilot result.
Estimated peak attendance60
Employees per planned desk1.35
Direct answer
What this tool calculates—and what it does not.
The calculator estimates desks from expected weekly attendance, concentration on the busiest day, unavailable inventory, and a planning buffer. It also displays the implied employee-to-desk ratio. Use the result as a pilot scenario, not as a universal benchmark.
Transparent methodology
How the calculation works
It spreads average weekly office attendance across available weekdays, applies a peak-day factor, adds a visible buffer, and adjusts for desks that cannot serve the general pool.
Formula or decision rulePlanned desks = (people × office days ÷ weekdays × peak factor) × (1 + buffer) ÷ (1 − unavailable-desk share).
Inputs explained
Observed or planned weekly frequency, not the peak itself.
How concentrated the busiest credible weekday is relative to even distribution.
Inventory not usable by the general pool because of assignment, repair, equipment, or another constraint.
An explicit allowance for uncertainty, visitors, onboarding, growth, and normal variation.
Practical use
When this tool is useful
- Comparing anchor-day and flexible-day capacity scenarios.
- Preparing a reversible desk-sharing pilot.
- Making hidden workplace-capacity assumptions reviewable.
A reliable way to use it
- 01Use one defined population and period
Keep location, eligible people, weekdays, and planning period consistent across every input.
- 02Replace assumptions with observed peaks
Pilot the scenario and compare expected demand with reservations, arrivals, turn-aways, and usable inventory by day.
- 03Test a downside case
Increase concentration or unavailable inventory independently so the capacity risk remains visible.
- 04Save the decision trail
Keep input sources, privacy and accessibility review, decision owner, pilot result, and next review date with the calculation.
Interpretation
How to read the result
- Compare the estimated peak with each weekday and location, not only the total.
- Keep accessible, specialist, collaboration, focus, and visitor capacity visible as separate types.
- Record turn-aways, unsuitable desks, no-shows, room pressure, and employee feedback during the pilot.
Illustrative scenarios
Compare like-for-like inputs without inventing a rate
These examples show the calculator arithmetic only. Replace every illustrative assumption with a current written figure for the actual situation.
Even week
Peak factor near 1.0
Demand is distributed; verify that individual teams and locations are also balanced.Anchor day
Higher peak factor
The same weekly frequency may need materially more desks because attendance is synchronized.Inventory stress
More unavailable desks
Repair, specialist use, or permanent assignment reduces the pool even when physical desks exist.Boundaries
What the result cannot tell you
- The model does not choose a legally, operationally, or ergonomically sufficient workplace.
- Average attendance can hide team, location, time-of-day, and seasonal peaks.
- A workstation count does not prove that the desks, rooms, access, acoustics, or technology suit the work.
- Attendance records should not be repurposed as automatic performance measures.
Common questions
Common questions about Desk-sharing ratio calculator
What does a 2:1 desk ratio mean?
It means two eligible employees per usable shared desk. It does not mean both people can arrive simultaneously or that the workplace has enough suitable desks on the peak day.
What peak factor should I use?
Use observed or pilot evidence from the actual weekday and location. If no evidence exists, compare multiple labeled scenarios rather than presenting one guess as fact.
Should unusable desks be counted?
No. Keep broken, reserved, specialist, inaccessible-to-the-pool, or otherwise unavailable inventory outside general capacity and document why.
Can badge data provide the answer?
It may cover part of an occupancy question, but coverage, duplicates, pass-backs, visitors, corrections, privacy, access, and the difference between entry events and actual workstation demand must be addressed.
How often should the ratio be reviewed?
Review after policy, headcount, schedule, location, inventory, team, accessibility, or material demand changes and at a fixed cadence during a pilot.
Evidence and review notes
Sources behind the method
These references support the method, boundary, or safety context. They do not turn this planning tool into individualized professional advice.
Optional next step
Follow app updates When office-day planning needs one shared workflow
HybridTrack is the iOS companion for individuals who want a clearer office-day record and better hybrid schedule planning. Workplace teams can also discuss a coordinated employer workflow.