Hours Calculator & Time Card Calculator

How hours and overtime are calculated

Hours between two times. The calculator subtracts the start time from the end time; if the end is earlier than the start, it adds 24 hours, so a 10:00 PM to 6:30 AM shift is 8 h 30 min. Unpaid breaks are then subtracted. Results are shown both as h:mm (8:00) and as decimal hours (8.00), which is what payroll uses — 15 minutes = 0.25 h, 30 = 0.50, 45 = 0.75.

Federal overtime (FLSA). Non-exempt employees earn at least 1.5× their regular rate for every hour over 40 in a fixed 7-day workweek. There is no federal daily limit. Example: five days of 9:00–5:30 with a 30-minute unpaid lunch is exactly 40.0 hours; add a 9:00–7:00 Saturday and the extra 10 hours are overtime.

California overtime (Labor Code § 510) adds daily rules: 1.5× after 8 hours in a day, after 40 hours in the week and for the first 8 hours on the seventh consecutive workday; 2× (double time) after 12 hours in a day and after 8 hours on the seventh consecutive day. Hours already paid as daily overtime are not counted twice toward the 40-hour weekly limit. Alaska, Colorado and Nevada also have daily overtime rules, and union contracts may be more generous — check your state.

Gross pay = regular hours × wage + overtime hours × 1.5 × wage + double-time hours × 2 × wage, before taxes. Your data stays in your browser; nothing is uploaded.

Frequently asked questions

How do I convert minutes to decimal hours for a time card?

Divide the minutes by 60. 15 minutes is 0.25 hours, 30 minutes is 0.5, 45 minutes is 0.75 and 20 minutes is about 0.33. So 7 hours 45 minutes is 7.75 hours; multiply decimal hours by your hourly rate to get pay.

When does overtime start under federal law?

Under the Fair Labor Standards Act, non-exempt employees must be paid at least 1.5 times their regular rate for hours worked over 40 in a workweek. Federal law has no daily overtime limit, so a 10-hour day is not overtime by itself if the week stays at 40 hours or less.

How does California daily overtime work?

California Labor Code section 510 requires 1.5 times pay for hours over 8 in a workday, over 40 in a workweek and for the first 8 hours on the seventh consecutive workday, and double time for hours over 12 in a workday and over 8 on the seventh consecutive day. Hours already paid as daily overtime are not counted again toward the 40-hour weekly total.

Sources

U.S. Department of Labor, Wage and Hour Division — Overtime Pay and Fact Sheet #23 (29 U.S.C. § 207). California Department of Industrial Relations, Overtime FAQ (Labor Code § 510).