About The Calculator Project
The Calculator Project is a free collection of practical financial calculators built for people who want to see the math before making a decision.
What We Build
The site started with everyday calculators for mortgages, loans, salaries, and dates. It has expanded into real estate investment tools that model fix and flip deals, rental cash flow, home sale proceeds, and flip-vs-BRRR decisions.
Our goal is not to replace a lender, CPA, attorney, appraiser, insurance agent, or title company. The goal is to give you a clear, transparent first pass so you know which questions to ask before money is on the line.
How We Work
Calculator logic is kept separate from the user interface and covered by automated tests where the risk is highest. For state-specific real estate assumptions, we prefer official government, regulator, and primary data sources. When a source is incomplete, we document the limitation instead of hiding it.
The public methodology page explains the formulas, source hierarchy, update cadence, and known limitations behind the tools.
What We Do Not Do
We do not provide personalized financial, legal, tax, insurance, or investment advice. Calculator output is an estimate based on the inputs and assumptions shown on the page. Actual costs can vary by lender, county, property, insurance carrier, closing agent, contract terms, and timing.
Contact
Questions, corrections, or source suggestions are welcome. Send them to cognitiverei@gmail.com.