What the guides cover
The guides explain the rules behind the calculators: how hours worked, breaks and overtime are treated under the FLSA and California law, how time clock rounding works, and how to calculate hours by hand or in Excel. Each guide cites the regulation it relies on and links to the matching calculator so you can check what you read against your own times.
- How to calculate hours worked: step by step, Excel formulas, common mistakes.
- The 7-minute rule: quarter-hour rounding under 29 CFR 785.48 and the California caution.
- FLSA overtime basics: workweek, regular rate, exemptions, daily overtime in California.
- Military time chart: 24-hour time with a full conversion table.
Related calculators
- How to Calculate Hours WorkedSix steps take you from clock-in and clock-out times to payable hours for a day and a week, with Excel formulas and the mistakes that most often produce a wrong total.
- The 7-Minute Rule and Time Clock RoundingEnter a punch time above to see how it rounds under quarter-hour, tenth-hour and 5-minute rounding, and compare the rounded result with the exact minutes.
- FLSA Overtime Rules ExplainedThe Fair Labor Standards Act sets the federal floor for overtime pay. This guide covers the workweek, the 40-hour threshold, the regular rate, who is exempt, state daily overtime and the records employers must keep.
- Military Time Chart and ConverterType a time in either format above to convert it. The chart below lists every hour from 0000 to 2300 with its 12-hour equivalent.