Free time card, work-hours, overtime and date calculators, each one built from the same rule the Department of Labor uses, not a house shortcut. Add up clock-in/out times, handle breaks and overnight shifts, and get weekly totals and pay instantly. No more squinting at a calculator at 11pm, doing the same sum four times, and getting four different answers.
From a single shift to a full week. Totals and pay in seconds, no mental math required.
Hours worked between a start and end time, minus breaks.
Open calculator →Add up daily hours into a weekly total with pay.
Open calculator →A full week of clock-in/out times with daily and weekly totals.
Open calculator →Overtime pay at 1.5× or 2× your regular rate.
Open calculator →Days between dates, or add and subtract days.
Open calculator →Working days between dates, or add business days skipping weekends and holidays.
Open calculator →Enter your times and we handle breaks, overnight shifts, overtime and pay, accurately and instantly, with nothing stored. You bring the hours, we bring the arithmetic. Everybody wins, especially you at 5pm on a Friday.
Overtime here follows the federal Fair Labor Standards Act's time-and-a-half rule over 40 hours in a workweek, with the Department of Labor fact sheet linked on the editorial standards page, so you can check the rule against the source instead of taking a widget's word for it.
The 2026 work hours and overtime dataset lists the current BLS average workweek and the federal overtime threshold with their observation dates, plus a downloadable CSV, so a number you cite traces back to a named release.
Guides like how to calculate hours worked and how to calculate overtime pay walk the math by hand, decimal conversion and all, so you can catch a rounding error on your own pay stub instead of trusting a black box.
Every time tool on this site runs the same core method: convert clock times to minutes since midnight, do plain arithmetic on whole minutes, and convert back at the end. A 9:00 AM punch becomes 540 minutes; a 5:30 PM punch becomes 1,050. Working in minutes is what keeps 7 hours 45 minutes from being mistyped as 7.45 hours (which is 7 hours 27 minutes, and a shortfall of 18 minutes of pay). When a shift ends on a smaller number than it started, the tools add 24 hours to the end time, so an overnight 10:00 PM to 6:30 AM shift computes to 8.5 hours instead of a negative number.
Results appear in two formats side by side, hours-and-minutes for humans and two-decimal hours for payroll, because the conversion between them is where most timesheet errors live. The tools themselves do not round your punches; if your employer's system rounds to the nearest quarter hour, as federal regulation permits when it averages out fairly, that happens before your numbers ever reach this page. Overtime, where a tool computes it, follows the federal FLSA standard: time and a half for hours past 40 in a workweek. States that add daily overtime on top, California most prominently, are flagged in the notes on the relevant pages rather than silently baked into a total.
TimeCardTools is built and maintained by the Encore Editorial team; the authors page says who wrote what, and the editorial standards page explains how figures get sourced and rechecked. Guides carry a byline and a dated update line. When a rule or a reference number changes, the page changes, and the date under the byline moves with it.