Commercial real estate

Rent per Square Foot Calculator

Convert annual per-square-foot lease rates into monthly and annual occupancy costs.

What this calculator estimates

Convert annual rates into monthly lease costs. It combines the inputs below to produce Monthly occupancy cost. Every assumption remains editable so the estimate can reflect the property, financing and location being evaluated.

Worked example

Using the displayed sample assumptions, the calculator produces $11,375. This is an illustration, not a market quote. Change one input at a time to understand what drives the result.

Inputs and assumptions

• Rentable area — sample input: 5000 sq. ft.
• Annual base rent per sq. ft. — sample input: 18 currency units per sq. ft.
• Annual additional rent per sq. ft. — optional — sample input: 8 currency units per sq. ft.
• Other monthly charges — optional — sample input: 0 currency units
• Sales tax — optional — sample input: 5 %

How to interpret the result

Use lease definitions and verified operating statements. Compare a conservative case with an expected case and keep a record of the assumptions used.

Common mistake to avoid

Do not compare properties using inconsistent NOI definitions. Local definitions, taxes, lending practices and measurement requirements can materially change the result.

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Reviewed 2026-09-08.