Hours Calculator

40:00

Hours worked

(per week)

Start time End time Break (mins) Total hours
Day 1 8:00
Day 2 8:00
Day 3 8:00
Day 4 8:00
Day 5 8:00
Day 6 0:00
Day 7 0:00

Hours Calculator – Add or Subtract Time Easily

The Hours Calculator helps you calculate total hours between two times, add/subtract hours, or sum up multiple time periods. It’s perfect for tracking work hours, billing clients, managing timesheets, or simply measuring productivity.

How to Use the Hours Calculator

You can use it in different ways:

  • Calculate hours worked from start and end time
  • Add or subtract time from a base time
  • Sum up hours across multiple days or entries

Format supported: 12-hour (with AM/PM) or 24-hour clock.

Time Calculation Formula

Total Hours = End Time − Start Time
Convert minutes to decimals if needed:
1 hour 30 minutes = 1.5 hours

Example

Start: 9:00 AM
End: 5:30 PM
Break: 1 hour lunch
Total = (5:30 − 9:00) − 1.0 = 7.5 hours
→ You worked 7.5 hours

Common Use Cases

  • Employee work time calculation
  • Freelance billing and invoicing
  • Overtime and shift tracking
  • Personal productivity and time logs
  • School or project study time calculation

Why Use a Time Hours Calculator?

Manually tracking hours across multiple days or formats is prone to errors. This tool ensures precision and saves time when preparing reports or invoices.

Frequently Asked Questions (FAQs)

Does this work with AM/PM or 24-hour time?

Yes, both formats are supported.

Can I deduct break time?

Yes, simply subtract break duration from the total.

How are minutes converted to hours?

Divide minutes by 60. For example, 45 minutes = 0.75 hours.

Can I calculate multiple days together?

Yes, use the sum function to add daily hour totals.

Can this be used for overtime?

Yes, compare total hours against regular time to determine overtime hours.


Related tools: Time Calculator, Salary Calculator,.