How do you calculate floor space cost per part?

Multiply occupied square feet by facility cost per square foot, divide by utilization to get effective cost, then divide by annual output. Here 850 x $18 = $15,300, divided by 78% = $19,615, divided by 95,000 units = about $0.21 per part.

Why divide by utilization?

Because unused capacity still costs rent. Dividing the annual space cost by 78% utilization raises the effective cost to $19,615, charging the parts you actually make for the idle space the cell consumes.

What is space cost per occupied hour?

It is the effective space cost divided by annual occupied hours: $19,615 / 4,200 = about $4.67 per hour. This is useful for comparing the real-estate burden of competing cells per hour run.

What counts as facility cost per square foot?

Lease or amortized building cost plus the space-driven overhead it carries: property tax, insurance, HVAC, lighting, and maintenance. The example uses $18 per square foot per year.

Is $0.21 per part a high floor-space cost?

For a small-footprint, high-volume cell that is low, often a fraction of material or labor cost. Space cost becomes significant for bulky, low-volume parts or sprawling cells, which is exactly where footprint reduction pays off.

How does shrinking the cell change cost per part?

It is linear in square footage. Cutting the cell from 850 to 680 ft squared lowers annual space cost to $12,240 and per-part cost to about $0.17, holding everything else constant.

Costing calculator

Floor Space Cost Calculator

Floor space cost assigns the real estate burden of a machine or cell to the parts it makes, so you can see what a square foot of factory actually adds to unit cost. Industrial engineers and lean teams use it to compare cell layouts, justify footprint reduction, and expose work centers whose space cost is buried in plant overhead. Utilization matters: a cell that sits idle still pays rent, so low utilization inflates the effective cost of every part that does come off it. This is the metric behind '5S and footprint reduction pay for themselves.'

What this calculator does

Calculate annual and per-part cost of occupied manufacturing floor space.
Use when comparing layout options, machine cells, storage areas, or make-versus-buy scenarios.
It converts annual occupied square footage and facility cost into an effective space cost, then spreads it across output to give cost per part and per occupied hour.

Formula used

Annual space cost = square feet × cost per square foot
Effective cost = annual space cost ÷ utilization
Cost per part = effective cost ÷ annual output
Cost per occupied hour = effective cost ÷ annual hours

Inputs explained

Occupied floor space: undefined
Facility cost: undefined
Annual output: undefined
Space utilization: undefined
Annual occupied hours: undefined

How to use the result

Use it when comparing cell layouts, evaluating a footprint-reduction project, or allocating facility overhead to specific products.
It allocates space cost on a straight-line basis and does not capture shared aisles, mezzanine value, or the option value of freed-up floor for new work.

Current U.S. benchmarks

U.S. manufacturing runs at 75.6% of capacity (Federal Reserve, May 2026). New factory orders are up 2.3% year over year (Census).

Common questions

How do you calculate floor space cost per part? Multiply occupied square feet by facility cost per square foot, divide by utilization to get effective cost, then divide by annual output. Here 850 x $18 = $15,300, divided by 78% = $19,615, divided by 95,000 units = about $0.21 per part.
Why divide by utilization? Because unused capacity still costs rent. Dividing the annual space cost by 78% utilization raises the effective cost to $19,615, charging the parts you actually make for the idle space the cell consumes.
What is space cost per occupied hour? It is the effective space cost divided by annual occupied hours: $19,615 / 4,200 = about $4.67 per hour. This is useful for comparing the real-estate burden of competing cells per hour run.
What counts as facility cost per square foot? Lease or amortized building cost plus the space-driven overhead it carries: property tax, insurance, HVAC, lighting, and maintenance. The example uses $18 per square foot per year.
Is $0.21 per part a high floor-space cost? For a small-footprint, high-volume cell that is low, often a fraction of material or labor cost. Space cost becomes significant for bulky, low-volume parts or sprawling cells, which is exactly where footprint reduction pays off.

Last reviewed 2026-05-12.