09:00 to 17:30, 30 min break
- Hours and minutes
- 8h 0m 0s
- Crossed midnight
- No
- Gross pay estimate
- $200.00
Time Duration Calculator
Time duration searches are handled by the Hours Calculator, which finds elapsed time, decimal hours, overnight shifts, breaks, and optional gross pay.
Time Duration Calculator is available as the Hours Calculator.
This is the same working tool under a different name. Keeping one main version means the formula, examples, FAQs, and guide link do not split into two slightly different pages.
Open Hours Calculator Inputs explained Result checks Example values Runs in your browser
Formula steps
- Convert start and end times into seconds after midnight.
- If the end time is earlier than the start time, treat it as an overnight shift.
- Subtract break minutes and convert the worked time to decimal hours.
How to use the Hours Calculator
- Enter the requested dates, times, grades, dimensions, network values, password options, or units.
- Check the assumptions shown on the page, especially school scales, payroll rules, concrete waste, subnet type, or security handling.
- Press the calculate button to see the answer, supporting metrics, and formula steps.
- Use examples, recent answers, or copy the result while keeping the estimate limits in mind.
What people use it for
Calculate hours worked from start time, end time, and break minutes.
Convert a shift into decimal hours for invoices or timesheets.
Estimate gross pay from an hourly rate.
Handle overnight shifts where the end time is after midnight.
Quick examples
Day shift
9:00 AM to 5:30 PM, 30 min break8 hours
No break
8:15 AM to 4:00 PM7.75 hours
Overnight
10:00 PM to 6:30 AM, 45 min break7.75 hours
Need the guide or a nearby tool?
Need a slower walkthrough, a related calculator, or the full library? These links keep you close to the task you started.
- How to use the Hours Calculator See slower examples, input meanings, formula notes, result limits, and mistakes to avoid.
- Date & Time Browse related calculators and utilities in the same category.
- Calculator and utility guides Find more guides that use real tool inputs and example numbers.
- All free tools Search every live tool, converter, calculator, AI helper, and browser utility.
Frequently asked questions
Plain-language answers about when to use the tool, what it does with your inputs, what to double-check, and how privacy works.
When should I use the Hours Calculator?
Use it when your task matches one of these common needs: Calculate hours worked from start time, end time, and break minutes. Convert a shift into decimal hours for invoices or timesheets. It works best when you already know the measurements, amounts, units, or options the page asks for.
What is the Hours Calculator doing with my inputs?
In plain language: The calculator converts start and end clock times into seconds, handles overnight shifts, subtracts break minutes, and converts the result to decimal hours. The examples on the page are there so you can compare your inputs with a worked example before copying the answer.
What do the main Hours Calculator inputs mean?
The main inputs are the measurements, amounts, units, or options the tool needs before it can work. Read each field label, keep units consistent, and compare your entry with the examples if the answer looks strange.
How should I read the Hours Calculator answer?
Read the headline answer, then check the supporting lines and examples to understand how the calculator got there. If one input changes, rerun the tool and compare the new answer instead of guessing.
What should I double-check before trusting the answer?
This is simple time-card math. Payroll rounding, overtime, split shifts, local labor rules, and employer policies can change paid hours. Also check the unit, scale, mode, and result limit because small input changes can change the answer.
Does the site save what I enter?
No. The calculator runs in your browser tab. Your recent answers stay only on the page while you use it, and they are not sent to a server.
Related tools
Time Calculator Add or subtract hours, minutes, and seconds with normalized H:M:S, total seconds, and decimal hours. Open Date Calculator Count days between dates or move a calendar date forward or backward. Open Salary Calculator Convert annual salary to monthly, biweekly, weekly, daily, and hourly pay. Open