Authors

Jessica Martinez

Contributing Writer, Business & Finance

The hours-worked math, the overtime and time-and-a-half rules, the pay-period breakdowns, and the decimal-hour and military-time conversions on this site all carry Jessica's byline. Underwriting consumer loan files for six years is where her habit of tracing a stated number back to its source comes from; a rounding error that favored the bank got flagged just as fast as one that did not. That same instinct is why a draft of hers gets its worked examples redone from raw clock times rather than carried over from the last version, and why a cited rule, the FLSA overtime threshold, a state's daily-overtime trigger, a federal holiday date, is checked against the actual Department of Labor page or agency release rather than a summary written about it.

Her bylines here: What Is a Biweekly Pay Period?, How to Calculate Hours Worked, How to Calculate Overtime Pay, The Complete Guide to Timekeeping & Payroll Hours, How Many Work Hours Are in a Year?, and the U.S. Work Hours and Overtime Rules (2026) dataset page. Two sibling sites carry her byline too: paycheck math on PaystubTools and loan math on LoanCalcTools, both reviewed the same way as the pages here.

Chris Terry

Owner and Editor, Encore Promotional Products

Chris wrote the hours, overtime and conversion logic behind every calculator here and runs TimeCardTools through Encore Promotional Products, alongside the sibling sites linked in the footer. He is the second check on Jessica's drafts and the only check on the calculators themselves: does the overtime split actually follow the FLSA's rule for hours past 40 in a workweek instead of a per-pay-period shortcut, is a state-specific rule like California's daily overtime trigger clearly marked as an exception rather than presented as the default, and do the decimal-hours and military-time conversions agree with each other across every tool that shares that logic. Reader-reported errors go through him and get corrected and dated the same week, and he keeps the editorial standards page current with whatever source list a given tool actually draws from.