Tools

Institutional-quality financial tools, free and open to everyone. No signup, no paywall.

Real Estate

Dollar Llama Real Estate Tool

Analyze any residential real estate deal across three strategies simultaneously: Buy & Hold, BRRRR, and Flip. Enter your numbers once and instantly see Cash-on-Cash return, Cap Rate, IRR, MOIC, monthly cash flow, a 10-year pro forma, and sensitivity analysis for each approach.

3 Strategies Side by Side — Compare Buy & Hold, BRRRR, and Flip in one analysis
10-Year Pro Forma — See how cash flow, equity, and property value grow over time
Sensitivity Analysis — Stress-test your assumptions with vacancy and rent shifts
Excel & PDF Export — Share your analysis with partners or lenders
Mixed-Use Support — Model LTR and STR units in the same property
Hard Money Modeling — Include bridge loans, origination points, and interest-only periods
Launch the Calculator →

Why I Built This

Every investor I know started with a spreadsheet they built from scratch. Most of those spreadsheets had errors. The commercial tools cost $50 to $200 a year and force you to choose one strategy before running numbers. I wanted something better: a free tool that compares all three approaches at once, runs entirely in your browser, and doesn't require an account.

This calculator uses the same financial formulas I use in my day job — PMT-based amortization, Newton's method IRR, and time-value-of-money projections. Your inputs are saved locally on your device and never sent to a server. Read the full story →

Got a Question?

Have a suggestion for the tool, or an idea for a new one? Send it my way.

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