Free Australian property calculators
Quick, accurate calculators for every property decision — from your first home’s stamp duty and mortgage repayments to investment yields and full development feasibility. Free, instant and mobile-friendly.
Stamp duty
State-by-state stamp duty for owner-occupiers, investors, first home buyers and foreign purchasers.
Mortgage repayments
Principal and interest, interest-only and split-loan repayments at any rate and term.
Borrowing capacity
How much you could borrow based on income, expenses and existing commitments.
Rental yield
Gross and net yield, including vacancy and outgoings, for any rent and price combination.
Cash-on-cash return
Year-one return on the cash you actually put in — the metric investors care about.
IRR & equity multiple
Multi-year IRR and equity multiple for development, value-add or hold scenarios.
Land value residual
Back-solve the land price that makes a development feasible at your target margin.
Feasibility quick-check
Yield, GFA, revenue and margin in 60 seconds — before you commission a single drawing.
About these calculators
Every calculator here is built for the Australian market — state-specific stamp duty schedules, APRA serviceability buffers, GST and outgoings conventions, and the metrics buyers, investors, valuers and developers actually use. They run entirely in your browser, so your numbers never leave your device, and they’re free with no sign-up required.
Start with a mortgage repayments or borrowing capacity estimate if you’re buying a home, or jump to feasibility quick-check and residual land value if you’re assessing a development site.
Estimates are indicative only and intended as a starting point. Actual figures depend on lender policy, market conditions, professional fees, taxes and other costs. Always confirm with a licensed broker, accountant, valuer or solicitor before acting.