Hours Calculator

Calculate hours and minutes between start and end times. Add up multiple work shifts, track total hours worked in a week, and calculate pay at an hourly rate — all in one free tool.

Hours Calculator
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How to Calculate Work Hours

To find hours worked: subtract the start time from the end time, then subtract any unpaid break time. For example: 9:00 AM to 5:30 PM = 8.5 hours, minus 30-minute lunch = 8 hours paid.

The calculator handles overnight shifts (e.g., 10 PM to 6 AM) by adding 24 hours when the end time is earlier than the start time.

Overtime Rules (USA)

LawOvertime TriggerRate
Federal (FLSA)Over 40 hrs/week1.5× regular rate
CaliforniaOver 8 hrs/day or 40/week1.5× or 2×
Alaska, NevadaOver 8 hrs/day1.5×

Frequently Asked Questions

How do I convert minutes to decimal hours?+
Divide minutes by 60. For example: 7 hours 30 minutes = 7 + (30/60) = 7.5 decimal hours. For payroll, multiply decimal hours by your hourly rate.
Can I calculate overnight shifts?+
Yes. If the end time is before the start time, the calculator automatically adds 24 hours to account for overnight shifts (e.g., 10:00 PM to 6:00 AM = 8 hours).

About the Hours Calculator

This free hours calculator helps you get accurate results instantly without needing to work through the math manually. Whether you need a quick estimate or a precise figure, having a reliable tool on hand saves time and reduces errors compared to manual calculation.

How to Use This Calculator

  1. Enter your values in the input fields above. Each field is labeled to guide you.
  2. Double-check your inputs — results are only as accurate as the numbers you enter.
  3. Click the Calculate button to see your result instantly.
  4. Use the result for your planning, budgeting, or decision-making.

Why Accurate Calculations Matter

Small errors in math calculations can compound into significant problems. A 1% miscalculation in a budget or measurement can translate to hundreds or thousands of dollars in wasted resources, or result in having to redo work entirely. This calculator uses the standard formulas and methods to give you reliable results you can trust.

Tips for Getting the Best Results

Frequently Asked Questions

Is this calculator free? Yes — completely free with no account, login, or payment required. Use it as many times as you need.

How accurate are the results? This calculator uses the standard formulas for hours calculations. Results are accurate for typical use cases. For specialized or high-stakes applications, consult a professional.

Does it work on mobile? Yes. This calculator is fully responsive and works on smartphones, tablets, and desktops.