Hours Calculator
Calculate total hours and minutes between start and end times for any shift.
Hours Calculator
Calculate total hours and minutes between start and end times for any shift.
Date Difference Formula
ℹ️ Weeks = days ÷ 7 | Months ≈ days ÷ 30.44 | Years ≈ days ÷ 365.25
Disclaimer
Results provided by this calculator are for informational and educational purposes only. They are based on the values you enter and standard formulas, and should not be considered financial, medical, legal, or professional advice. Always consult a qualified professional before making important decisions based on these results. Roughtools makes no warranties regarding the accuracy or completeness of these calculations for your specific situation.
Frequently Asked Questions
Pro Tips
Business days vs calendar days matter for deadlines. A 30-day contract deadline is 30 calendar days, but a "30 business day" deadline is closer to 6 weeks.
Leap years (every 4 years, except century years not divisible by 400) add 1 day. Long-term date calculations that span February should account for this.
For countdown timers to important dates, include time zones — "Friday midnight" in New York is 3 hours different from California.
Age in years alone hides important milestones. "30 years, 6 months" is much more precise than "30 years old" for medical or legal calculations that need exact age.
When to Use This Calculator
Calculate exact days between today and a project deadline to plan work backwards.
Find exact age in days, weeks, or months for birthday milestones or official age verification.
Calculate days until a trip or visa expiry, or find the length of a journey between dates.
Verify contract end dates, notice periods, or lease expiry dates down to the exact day.
Count down days in a 30-day, 60-day, or 90-day fitness or habit challenge.
About the Hours Calculator
This hours calculator computes the exact time elapsed between any start time and end time — including shifts that cross midnight — and deducts a configurable lunch or break period. Enter clock-in and clock-out times for up to a full week of shifts to see daily hours, weekly total, and earnings at your hourly rate. Built for hourly employees, freelancers, managers, and anyone tracking time worked for payroll or invoicing.
How to Use the Hours Calculator
- 1
Enter your clock-in (start) time for each day or shift.
- 2
Enter your clock-out (end) time for each day or shift.
- 3
Enter break/lunch duration to deduct (in minutes).
- 4
See total hours and minutes worked per day and for the full week.
- 5
Optionally enter your hourly rate to calculate gross pay for the period.
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