Hours Calculator
Enter your start and end times to find total hours worked, or enter hours and an hourly rate to calculate gross pay.
Last updated: August 2026 · Written and verified by Akash Pandey
Calculate hours
Hours worked
This runs the same calculation engine as the main scientific calculator, entirely in your browser. Nothing you type is sent anywhere.
Tracking hours worked
Tracking hours is essential for accurate pay, project budgeting, and understanding how you spend your time. This calculator handles common time-tracking tasks.
Overtime rules
In the United States, the Fair Labor Standards Act (FLSA) requires overtime pay at 1.5× the regular rate for hours worked over 40 in a workweek. Some states have additional rules.
Overtime pay = hours × rate × 1.5
Common work schedules
| Schedule | Hours/week | Hours/day |
|---|---|---|
| Full-time (US) | 40 | 8 |
| Full-time (EU) | 35–40 | 7–8 |
| Part-time | 20–30 | 4–6 |
| Shift work (12hr) | 36–48 | 12 |
| Four-day week | 32–40 | 8–10 |
Worked example
Calculate pay for 45 hours at $25/hr with overtime
40 × 25 + 5 × 25 × 1.5
- Regular pay:
40 × $25 = $1,000. - Overtime hours:
45 − 40 = 5hours. - Overtime rate:
$25 × 1.5 = $37.50. - Overtime pay:
5 × $37.50 = $187.50. - Total:
$1,000 + $187.50 = $1,187.50.
= $1,187.50
- Regular pay:
Frequently Asked Questions
How do I calculate overtime?
Multiply overtime hours by your hourly rate × 1.5. For example, 5 overtime hours at $25/hr = 5 × $25 × 1.5 = $187.50.
How do I convert minutes to decimal hours?
Divide minutes by 60. For example, 45 minutes = 45/60 = 0.75 hours. 30 minutes = 0.5 hours.
How many hours are in a work week?
A standard full-time work week is 40 hours (8 hours per day, 5 days). Some countries use 35 or 37.5 hour weeks.
What is time-and-a-half?
Time-and-a-half means your hourly rate × 1.5 for overtime hours. For example, $20/hr becomes $30/hr for hours worked beyond 40 in a week.
How do I calculate my annual salary from hourly rate?
Multiply your hourly rate by hours per week, then by 52 weeks. For example, $25/hr × 40 hrs × 52 = $52,000 per year.
What is a bi-weekly pay period?
Bi-weekly means every two weeks, resulting in 26 pay periods per year. Some employers pay weekly (52 periods) or semi-monthly (24 periods).
How do I track billable hours?
Record start and end times for each task. Subtract breaks. Many professionals use the 6-minute rule: round to the nearest 0.1 hour (6 minutes) for invoicing.
What is the difference between billable and non-billable hours?
Billable hours are the time you spend on client work that you can charge for. Non-billable hours include admin, training, and internal meetings. Tracking both helps you understand your true utilization rate.