Hours Of Service Calculator



Calculating hours of service is a crucial task for various industries to ensure compliance with labor regulations and optimize workforce management. To simplify this process, we’ll create a user-friendly Hours of Service Calculator using HTML and JavaScript. This calculator will help users determine the total hours worked based on the start and end times.

How to Use

  1. Input the start time in the “Start Time” field.
  2. Input the end time in the “End Time” field.
  3. Click the “Calculate” button to obtain the result.


The formula for calculating hours of service is straightforward:


Suppose an employee starts working at 9:00 AM and finishes at 5:30 PM. Using the calculator, the calculation would be as follows:


Q1: Can I use this calculator for irregular working hours?
A1: Yes, the calculator considers both regular and irregular working hours.

Q2: Is it applicable for overnight shifts?
A2: Absolutely. The calculator handles time spans that cross over midnight seamlessly.

Q3: What time format should I use?
A3: Input time in 24-hour format (e.g., 14:30 for 2:30 PM).


Our Hours of Service Calculator offers a simple solution for businesses and individuals needing accurate time calculations. Whether for payroll, compliance, or personal tracking, this tool provides a quick and efficient way to determine hours worked.

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