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Author

Jeff Beem

Jeff Beem

Lead Developer, CalcRegistry

Jeff Beem is the developer behind CalcRegistry. He spent nearly twelve years in the U.S. Navy before moving into software in 1999, and in the 26+ years since he has shipped lending, finance, and legal-tech applications for companies including Helvetic Payroll, DriveTime, Leaf Software Solutions, SmarterHQ (now Wunderkind) and IPRO Tech. The financial calculators on this site reflect amortization and origination math he's worked with directly in production lending systems. He built CalcRegistry because most calculator sites are cluttered, slow, and wrong. He moves around a lot, but currently lives in Montréal.

In his own words

Financial calculators

The financial calculators are the ones I know from the inside. I spent years building the origination and amortization systems that auto lenders and mortgage companies run on, the same math that's in these tools.

I know what amortization actually looks like in a production lending system, and I built these to match that, not a textbook approximation.

Health & fitness calculators

My wife has a theory that I missed my calling in nutrition and bioscience. I have no credentials there, so take that for what it's worth, but I do read the primary sources, and the health tools here follow NHLBI and WHO guidance rather than whatever a generic formula site copied from somewhere.

The BMI, calorie, and TDEE calculators cite the specific publications they're built from.

Calculators

Tools I build and maintain on CalcRegistry.

Fitness & health

Find me

About CalcRegistry explains how the site works, our privacy model, and why calculations run in your browser.