Use this real-estate calculation for a transparent preliminary valuation, financing, income, expense, area, tax, return, or market scenario with explicit dates and assumptions.

Usable Square Feet (ft2)

Required number input.

Gross Square Feet (ft2)

Required number input.

Usable floor area as a percentage of total gross building area. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Efficiency Percent (percent)

The resulting efficiency percent returned as a number.

• Real properties differ in location, condition, leases, zoning, title, taxes, financing, vacancy, capital needs, environmental risk, and market liquidity. Forecasts and ratios are not appraisals, loan offers, tax opinions, or investment advice.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Reconcile assumptions to leases, operating statements, surveys, tax records, lender terms, comparable evidence, and physical inspection; test downside scenarios and obtain qualified local advice.

• Floor Area Ratio

  Total gross floor area divided by land area, using matching area units.

• Lot Coverage Ratio

  Building footprint area as a percentage of site area.

• Rentable To Usable Ratio

  Rentable floor area divided by usable floor area.