Calculators
Practical calculators we use for clarity and decision-making. Built to be simple and usable — not theoretical.
(Some calculators are referenced inside our courses.)
Real Estate Investing Calculator
Model purchase price, rents, expenses, and cash-on-cash assumptions.
OpenGraham–Buffett Margin of Safety Calculator
Stress-test value vs price and build a margin of safety habit.
OpenVC & MedTech Upside vs Downside Calculator
Model asymmetric outcomes and dilution-aware expectations.
OpenNeed a plan, not a calculator?
If you want a capital strategy routed to your goals and constraints, start with the intake.
Written and reviewed by Pouyan Golshani, MD, Interventional Radiologist — Last updated April 7, 2026