15 calculators

Property investing calculators

Every calculator runs real amortisation math in AUD, shows the formula, and explains what the result means. No log-in, no gated results.

The full worksheet: loan payment, effective rent, and monthly cash flow, graded against an honest benchmark.

Buy, rehab, rent, refinance, repeat — see how much cash actually stays in the deal after the refinance.

Purchase, rehab, holding costs, and selling costs rolled into a single profit and ROI projection.

Principal & interest plus tax, insurance, and HOA rolled into one full monthly payment.

Net operating income divided by purchase price — the quickest all-cash comparison across properties.

Annual cash flow divided by the actual cash you put in — the return that reflects leverage.

How much of the property is financed, and how close that puts you to a lender’s comfort threshold.

The occupancy rate a property needs just to cover its fixed monthly costs.

Roll up tax, insurance, HOA, maintenance, and management into one monthly total and an expense ratio.

A rough ceiling on purchase price based on income, existing debts, and a target debt-to-income ratio.

Gross and effective rental income across multiple units, after an assumed vacancy rate.

What a single turnover actually costs once lost rent and turnover expenses are added up.

Total return on the cash actually invested, plus a simple annualized figure for comparing holding periods.

Gross and net rental yield — the ratio investors quote most often when comparing properties by price.

Run two properties through the same worksheet side by side and see which one clears more benchmarks.