Office Space Calculator

Maison Office’s office space calculator helps businesses estimate their office requirements based on headcount, seating density, and functional areas such as meeting rooms, pantries, and management offices. Using three reference allocations of 3.5 m², 6 m², and 10 m² per person, businesses can establish an initial space requirement and shortlist premises that suit their operations, budget, and expansion plans.

1. How to Calculate Office Space Requirements by Headcount

The amount of office space required depends on the number of workstations, floor area allocated per employee, and space needed for internal activities. Headcount provides the basis for calculating the main work area, while meeting rooms, pantries, and other facilities determine any additional space requirements.

1.1 Formula for Calculating Required Office Space

Businesses can estimate their office space requirements using the following formula:

Estimated total office area = Work area + Additional functional areas 

Where: 

● Work area: Number of workstations × Space allocation per person (m²).
● Additional functional areas: Combined area of meeting rooms, training rooms, pantries, management offices, reception areas, and any other spaces excluded from the main work area.

Example: A company with 50 employees working on-site simultaneously selects 6 m² per person: 50 people × 6 m²/person = 300 m². 

Under this calculation, the company needs 300 m² for its work area. Any additional functional rooms not included in this figure will increase the overall requirement accordingly.

When planning space, businesses must establish whether the allocation per person already includes internal circulation or shared areas. Space included in the original allocation must not be counted twice.

Note: The calculator provides an initial area estimate. This figure does not automatically represent the chargeable area specified in an office lease. 

1.2 Space Allocation Benchmarks: 3.5, 6, and 10 m² per Person

The Maison Office calculator uses three reference space allocations based on workstation density.

Source: Reference allocations used in the Maison Office office space calculator. These are planning benchmarks, not legally mandated space standards. 

● A 3.5 m²/person allocation may suit businesses prioritizing workstation capacity and a compact layout. However, desk dimensions, circulation widths, and safety requirements must be checked before adopting this density.
● A 6 m²/person allocation provides a useful initial benchmark for businesses seeking a balance between workstation numbers and individual workspace. The figure should still be adjusted for work patterns and floor-plate configuration.
● A 10 m²/person allocation is suitable when businesses want larger workstations, bigger desks, or more separation between seats. This choice does not depend solely on whether a building is Grade A, B, or C.

Beyond seating density, businesses should consider peak simultaneous attendance. With hybrid working or shift-based schedules, the required number of desks may be lower than total headcount when an effective flexible seating system is in place.

1.3 Office Space Reference Table for 10–200 Employees

The following table shows calculated workspace requirements at 3.5, 6, and 10 m² per person, helping businesses define an appropriate size range before searching for office premises.

Source: Maison Office calculations based on headcount and the three reference allocations. Additional functional areas are excluded where they need to be calculated separately.

For example, a business with 100 employees on-site simultaneously requires between 350 and 1,000 m² of work area, depending on the selected allocation. At the medium benchmark of 6 m²/person, the result is 600 m².

During property inspections, businesses should compare the estimate with the actual floor plan. Structural columns, lift cores, technical areas, and floor-plate shape can affect how many workstations can be accommodated.

2. Calculating Space for Meeting Rooms, Pantries, and Other Facilities

In addition to workstations, businesses need to allow space for meetings, training, client reception, management, and staff amenities. The size of each area depends on simultaneous occupancy, frequency of use, and working arrangements.

The Maison Office calculator allows users to add functional rooms and develop a space estimate that more closely reflects their operational requirements.

2.1 Meeting Room and Training Room Space Requirements

Meeting room size should reflect seating capacity, furniture arrangement, and meeting equipment. Businesses running several meetings simultaneously may need multiple smaller rooms, while those regularly holding department-wide meetings should consider larger facilities.

The Maison Office calculator provides the following meeting and training room categories:

Note: These occupancy ranges are selection options in the calculator, not prescribed floor areas in square metres for each room type.

When determining the actual area, consider meeting table configurations, seating, displays, video-conferencing equipment, and circulation space.

A classroom-style training room may require a different area from a seminar room with rows of chairs. If training takes place infrequently, a multipurpose room can reduce underused floor space.

Recommendation: Determine the number of meeting rooms from the number of concurrent meetings, while accounting for client meetings and private discussions between departments. 

2.2 Pantry and Dining Room Space Requirements

Office pantries and dining rooms support staff needs throughout the working day. They serve different purposes and should be assessed separately when calculating office space.

Maison Office groups these facilities by their intended use:

The pantry configuration depends on the equipment provided and employee usage patterns. Where a separate lunchroom is required, allowance should be made for tables, seating, food-service facilities, and circulation.

Example: A business with 100 employees that staggers lunch breaks can size its dining area according to the number of people using it at one time. This approach gives a more practical estimate of space needs.

Before installing a pantry or dining room, check water supply and drainage, electrical capacity, ventilation, and building management regulations.

>> Explore: Office Interior Design and Building Services by Maison Office

2.3 Management Offices, Reception, and Additional Facilities

Management rooms, executive offices, reception areas, and storage rooms should be sized according to their functions, rather than assigning every business the same fixed area.

Areas to consider include:

● Management offices: Base the allocation on the number of private workstations and internal meeting requirements.
● Executive office: Allow for a desk, visitor seating, and required equipment.
● Reception: Consider reception desk size, visitor waiting capacity, and visitor frequency.
● Storage: Calculate space according to document volumes, equipment, and storage conditions.
● Support areas: These may include print stations, lockers, quiet rooms, or specialist facilities.

Businesses should avoid double-counting workstations. If an executive has a private office and no permanent desk in the open-plan area, that position should be removed from the open-plan workstation count.

Add functional areas only when they are not already included in the selected per-person allocation or work area calculation.

3. Understanding Net and Gross Areas in Office Leasing

Net and Gross are common terms in commercial office quotations. The key distinction is the measurement boundary and whether a proportion of shared areas is included.

Understanding these terms helps businesses compare the calculator’s estimated area with the floor area offered by a landlord.

3.1 What Is the Difference Between Net and Gross Office Area?

Net area generally describes the space reserved for the tenant’s exclusive use, excluding common areas outside the leased premises.

Under some quotation methods, Gross area includes the tenant’s private area plus an allocated share of common space. The precise scope depends on the measurement methodology applied.

Terminology can vary between buildings. Businesses should request confirmation of their exclusive-use area, chargeable area, and measurement methodology when obtaining a leasing quotation.

>> What’s the difference between Net area vs Gross floor area? 

3.2 Which Area Is Used to Calculate Office Rent?

Chargeable area is determined by the lease terms and the building’s quotation method. As a result, a lower quoted rental rate does not necessarily produce a lower total rent.

Consider two office options, each providing 200 m² of private usable space:

Illustrative comparison only. Figures are hypothetical and exclude service charges, VAT, and other additional costs.

Option B has a rental rate USD 1/m²/month lower than Option A, yet its base monthly rent is USD 280 higher because the chargeable area is larger.

When comparing office buildings, businesses should request quotations showing the chargeable area, rental rate, service charges, VAT, overtime air-conditioning fees, parking charges, and other relevant expenses. This allows a fair comparison of total occupancy costs for equivalent space requirements.

4. Office Space Calculation Examples for 50 and 100 Employees

The following examples illustrate how to apply the headcount-based formula alongside functional space requirements. Room sizes are hypothetical assumptions used to explain the calculation and have not been confirmed as fixed coefficients in the Maison Office calculator.

4.1 How Much Office Space Does a Company with 50 Employees Need?

For 50 employees working on-site simultaneously, at the medium benchmark of 6 m²/person, the estimated work area is 300 m².

Assume the business also needs one small meeting room, one medium meeting room, and a pantry, none of which is included in the work area.

Note: Functional room areas are illustrative assumptions. The total applies only if these rooms are entirely outside the initial 300 m² work area.

Under this scenario, the business can begin viewing premises providing approximately 347 m² under the selected calculation method. The floor plan must nevertheless be checked to establish whether all workstations, meeting rooms, and pantry facilities can fit in practice.

If the building provides shared meeting rooms or the company does not require a private pantry, the estimated requirement may be lower. Executive offices, storage, or future hiring needs could increase it.

4.2 How Much Space Does a 100-Person Office Need with Meeting Rooms and a Pantry?

A business with 100 employees present simultaneously needs 600 m² of work area at the reference allocation of 6 m²/person.

Assume it operates several departments and also requires two small meeting rooms, one large meeting room, a pantry, a reception area, and storage.

Note: This is a hypothetical space-planning example, not an output taken directly from the calculator.

The business should prioritize premises that can accommodate the specified workstations and functional areas.

An office floor advertised at 714 m² may still be unsuitable. The exclusive-use area may differ from the chargeable area, while columns, technical cores, and an irregular floor plate can restrict layout options.

Before selecting a property, review its floor plan, the proposed positions of functional rooms, and the number of workstations it can actually accommodate.

4.3 Why Can Actual Space Requirements Differ from the Estimate?

The calculator generates an area estimate from the user’s selected inputs. When inspecting a particular office building, the estimate may need adjustment for its physical configuration and conditions of use.

Common factors include:

● Floor-plate shape: Regular floor plates with fewer narrow corners are generally easier to furnish with workstations.
● Columns and technical cores: These may affect the placement of partitions, desks, and circulation routes.
● Chargeable area: This can differ from private usable area because of measurement methods or allocated common areas.
● Shared amenities: Existing meeting rooms or pantries in the building may reduce the need for dedicated facilities.
● Fit-out design: Desk dimensions, storage cabinets, and functional zones affect the amount of space that can be used effectively.

The estimate should therefore be used to define an initial search range before developing a space plan and comparing it against the actual handover area.

5. What to Check Before Leasing Office Space

Suitable office premises must accommodate the current workforce, operational requirements, and potential expansion during the lease term. Businesses should assess floor area, layout efficiency, and actual occupancy costs together.

5.1 Confirm Current On-Site Headcount and Expansion Plans

Current staffing is a major input when calculating office space. For businesses whose employees work on-site full-time, workstation numbers should generally reflect attendance on peak office days. Hybrid and shift-based operations may require fewer simultaneous workstations than the total employee count.

For example, a company employing 100 people but hosting no more than 70 at a time may consider a 70-desk flexible seating plan, provided working schedules and desk allocation can be managed effectively.

Businesses should also assess projected headcount during the lease. If staffing is expected to increase from 50 to 60, an allocation of 6 m²/person would require an additional 60 m² of work area, excluding any expansion of shared or functional facilities.

A business can lease spare capacity from the outset or choose a building with additional vacant space for later expansion. These options should be compared against cost and the certainty of workforce projections.

5.2 Review Unusable Areas and Floor-Plate Configuration

Advertised floor area alone does not show how efficiently an office can be laid out. Structural columns, narrow corners, service partitions, and irregular floor plates may leave portions of space difficult to use.

During an inspection, check:

● Column positions: Will they interfere with desk rows, meeting rooms, or walkways?
● Floor-plate shape: Can work areas and supporting facilities be divided efficiently?
● Technical cores: Do they restrict partitions, equipment placement, or ancillary spaces?
● Internal circulation: Are walkways adequate for movement and applicable safety requirements?
● Partitioning options: Can the floor support the necessary departments and levels of privacy?

A smaller, efficiently configured office may accommodate the same workstation count as a larger unit with substantial unusable areas. This should be verified through a practical test-fit layout.

5.3 Office Area Measurement Methods in Lease Agreements

The measurement methodology affects the definition of both the handed-over floor area and the area used to calculate rent. When requesting a quotation, businesses should clarify which measurement boundaries the landlord applies.

Three methods commonly discussed when reviewing office premises are:

Treatment of technical and structural elements can vary by measurement methodology and applicable rules. Businesses should not assume a fixed percentage difference between methods without verified plans and measurement specifications.

Technical guidance from BOMA International and RICS can provide references for property measurement. Any standard used must be identified in the building documentation and contractual terms. 

5.4 Compare Floor Plans, Handover Area, and Lease Terms

Before signing an office lease, compare the floor plan, quoted area schedule, and measurement methodology to confirm usable and chargeable areas. The lease should specify these figures and establish how discrepancies between quoted and delivered areas will be handled.

For fitted offices, check workstation capacity, meeting rooms, and supporting facilities against operational requirements. For bare-shell premises, prepare a preliminary test fit from the technical drawings to assess usable space and structural limitations before committing.

6. Find Office Space That Matches Your Calculated Requirement

Once the initial estimate is complete, businesses can use the Maison Office calculator’s result to set their required area range alongside budget, preferred location, and operational criteria.

For an estimated requirement of around 300 m², shortlist buildings with sufficient usable office area, then check subdivision options and handover conditions.

For larger requirements, such as 700 – 1,000 m², prioritize properties with suitably sized typical floor plates or the ability to accommodate multiple departments on one floor.

In addition to recommending a building shortlist, Maison Office supports site inspections, analyzes the advantages and disadvantages of each location, and advises on negotiating rent and important lease clauses. This helps businesses choose an office aligned with their long-term operating strategy, optimize costs, and maintain a professional image when working with employees, clients, and partners. 

When selecting a building, compare usable area, total occupancy costs, handover specifications, building systems, and expansion options. The calculator supports the initial shortlist, while the final leasing decision should be based on property inspections and the business’s actual lease documentation.

Contact Maison Office for an office shortlist matching your calculated space requirements, updated availability, the latest rental quotations, and a viewing schedule tailored to your business.

7. Frequently Asked Questions About Office Space Requirements

7.1 How Much Office Space Is Needed for 50 Employees?

For 50 employees, the estimated work area is 175 m² at 3.5 m²/person, 300 m² at 6 m²/person, or 500 m² at 10 m²/person. These calculations use Maison Office’s planning benchmarks. To determine the total space requirement, businesses must also account for any meeting rooms, pantries, management offices, and other facilities not already included in the per-person allocation.

7.2 How Many Employees Can Work in a 100 m² Office?

If all 100 m² is allocated to workstations, it theoretically accommodates approximately 28 people at 3.5 m²/person, 16 at 6 m²/person, or 10 at 10 m²/person. These are reference calculations, not confirmed seating capacities. Actual capacity depends on usable area, floor layout, circulation, and additional functional spaces.

7.3 Is Net or Gross Area Used to Calculate Office Rent?

The area used to calculate rent depends on each building’s measurement method and quotation terms. Businesses should establish the private usable area, any allocated common areas, and the chargeable area. When comparing options, assess total base rent, service charges, and actual usable area instead of relying solely on the quoted USD/m²/month rate.

7.4 Should Businesses Allow Extra Space for Future Headcount Growth?

Businesses should consider expansion capacity if hiring or operational growth is planned during the lease term. The additional requirement should be calculated from projected workstations and any larger functional areas. Where recruitment forecasts remain uncertain, a building with expansion options or a flexible lease arrangement may help avoid paying for unused space.

7.5 Can the Calculator Replace an On-Site Floor Measurement?

The Maison Office calculator estimates space requirements from headcount, workstation density, and selected functional areas. It does not replace floor plans, interior test-fit layouts, or area measurements confirmed in the lease. Before signing, businesses should verify actual workstation capacity, the handover area, and the chargeable-area calculation applied by the building.