Jonathan Reed, MS
Master of Applied Mathematics
Jonathan Reed earned his M.S. in Applied Mathematics from Carnegie Mellon and worked for six years as a statistician at the US Census Bureau, building population and time-use models. His at CalcCentral is to author and review every math and time calculator — percentage, fraction, statistics, age, date — to ensure the formulas are mathematically correct, the rounding matches NIST conventions, and the worked examples are reproducible. Jonathan is also responsible for the technical accuracy of the GPA, grade, and time-zone tools used by students worldwide.
Independent review
Jonathan’s work is independently reviewed by Maya Chen, CFA (Chartered Financial Analyst). This cross-discipline four-eyes review is one of the requirements of our editorial policy for any YMYL (Your-Money-or-Your-Life) page.
Editorial standards
- Reviewed quarterly and after any regulatory or methodological change.
- Source data verified against authoritative bodies (IRS, FHFA, NIH, CDC, BLS, NIST).
- No affiliate bias: results are computed without favoring any lender or product.
- Mathematical formulas reproduce exactly when verified by hand or spreadsheet.
Last reviewed: August 12, 2026. Next scheduled review: quarterly.