FREE TOOLS · UPDATED 2026-Q2
Free real estate calculators
Honest math for agents, investors and homeowners. Conservative defaults, every assumption cited, free to embed on your own site. We update the underlying market data quarterly.
Sellers · Investors · Mortgage advisors
Vacant Home Carrying Cost Calculator
Calculate the daily, weekly, and monthly cost of leaving a property empty — mortgage, taxes, insurance, utilities, maintenance.
Open calculator →Listing agents · Brokerages · Photographers
Virtual Staging ROI Calculator
Should you stage this listing? Run the full math: carrying cost saved + sale-price lift − staging cost. AI vs physical vs no staging side by side.
Open calculator →How we build these
- Conservative defaults. We anchor to the bottom end of academic ranges and median industry figures, not the most-aggressive marketing stats. The output should hold up to skeptical review.
- Transparent sources. Every assumption is paired with the source — Freddie Mac, NAR, NAIC, Tax Foundation, RESA. Inline citations on every input.
- Adjustable. Sliders expose the range of uncertainty so you can plug in your own market figures and see how sensitive the result is.
- Quarterly refresh. Mortgage rates, tax rates, insurance and DOM figures are updated each quarter. Embedded versions stay current automatically.
- Free to embed. One-click iframe on every tool page. Free for agents, brokers, photographers and publications. Attribution link only.
More tools coming
Listing photo audit, MLS disclosure compliance checker, state-by-state staging disclosure map — all shipping over the next few months. Want to see what we're working on or suggest a tool?
support@instantroom.app