Quick guide
How to use this calculator
- Enter property amounts from one consistent currency and period.
- Use the labels to match the calculator's stated income, cost, area, or capacity convention.
- Read the assumptions beside the result before using it in an investment comparison.
Calculation method
Calculation method
Operating expense ratio = annual operating expenses ÷ effective gross income × 100%.
Entered fixed decimals use exact rational arithmetic. Money rounds only for display; a supported nonzero amount is never replaced by a misleading zero.
Worked example
Worked example
Operating expenses of 42,000 and effective gross income of 100,000 produce a 42% operating expense ratio.
Operating expense ratio = annual operating expenses ÷ effective gross income × 100%.
Supported inputs
Precision and limits
Visible input limits
Amounts accept up to 30 digits and 12 decimal places and are capped at 1e12 per input. Rates are capped at 1000%; signed value-change rates cannot be below −100%.
International scope
No currency, tax regime, tenancy law, lender threshold, local market database, appraisal standard, or jurisdiction-specific fee is assumed.
Decision boundary
The result is an arithmetic scenario based on visitor-entered figures, not an appraisal, forecast, lending decision, legal determination, or investment recommendation.
Calculator-specific assumptions
Financing costs, income tax, depreciation, and capital expenditures are excluded unless the user's chosen operating statement convention includes them.