Hours Calculator

The hours calculator measures elapsed clock time between a start and an end, subtracting unpaid break minutes you enter. It answers how long a shift lasted in hours and minutes—and decimal hours—without building a full weekly timesheet. Results stay in the browser for quick checks before you copy numbers into payroll software or client invoices. Overnight spans and split shifts are supported when you enter clock times faithfully.

Single shift versus weekly card

Use this page for one shift, a freelance block, or a classroom coverage window. Enter clock-in, clock-out, and break minutes. For a full week with overtime splits, open the time card calculator or overtime hours calculator. To convert HH:MM into decimal form for forms that only accept 7.5, use the decimal hours converter. Pure duration math without clock faces belongs on the time calculator under the time tools hub.

How to calculate

Enter start time and end time, add unpaid break minutes if lunch should not count toward paid hours, then calculate. The result lists HH:MM worked, decimal hours, break deducted, and the time range you entered. Edit and recalculate freely—the page does not store shifts on a server for ordinary use.

Paid break policies vary. Some workplaces pay short breaks; others require a full unpaid lunch. Match the break field to the policy that applies to you. This tool performs arithmetic only; it does not interpret employment law, union rules, or contract terms that define paid time.

Overnight and split shifts

When end time is earlier on the clock than start time, the calculator treats the end as the next calendar morning—so 10:00 PM to 6:00 AM yields eight hours before breaks. Confirm how your employer defines the workday boundary across midnight. Double shifts on the same civil day may need two separate calculations summed afterward.

Rounding rules—nearest quarter hour, tenths, and so on—differ by employer. Apply rounding after you read the raw result if your handbook requires it. Military time users can convert first with the military time converter.

Worked example: office day

Clock in at 8:30 AM, leave at 5:00 PM, take thirty minutes unpaid lunch. Enter those values; the result is eight hours zero minutes of paid time (8.5 clock hours minus 0.5). Copy 8:00 or 8.0 into your timesheet depending on the format payroll expects.

A contractor bills three client blocks in one day. Calculate each block separately, sum the decimal hours, and reconcile against the weekly card. Keep a printed month from monthly calendars nearby when planning 2026 capacity.

Freelance, hourly, and coverage use cases

Freelancers bill in blocks rather than formal punches—compute each segment, then sum. Substitute teachers and event staff track coverage windows the same way. Volunteers logging service hours can total time without a full HR system when each event has clear start and end clock readings.

When a client asks for decimal hours, convert after you trust the HH:MM result. When a client asks for rounded quarters, apply rounding last and note assumptions on the invoice. Document break treatment in the invoice notes so disputes are easier to resolve later.

Multi-city schedules

Questions like “what time is their 9:00 here?” belong on event time or the meeting planner, not on this hours page. Once a meeting ends, you can still use the hours calculator to measure how long the call lasted if you recorded start and end clock times.

Pair shift math with the stopwatch when you are timing an open-ended task live, then transfer the final elapsed reading into start/end fields if your form requires clock notation.

Quality checks before submit

Re-read start and end for AM/PM mistakes—the most common error. Confirm break minutes match what actually happened, not the handbook maximum. For split shifts, calculate twice and add. For weekly overtime thresholds, move totals into the overtime or time card tools rather than inferring rules here.

If you often cross midnight, adopt a simple habit: when end time looks earlier than start, it means next morning. That prevents night shifts from appearing as negative spans.

Volunteer and classroom coverage

Volunteer coordinators track service hours for annual reports by calculating each event separately—setup, main shift, teardown—and summing decimal hours. Substitute teachers record morning and afternoon coverage blocks when the district pays by the hour rather than a flat half day.

Event staff working split gates at a festival can run one calculation per location and reconcile against sign-in sheets at day end.

Pairing with live timers

Use the stopwatch while a task runs, then transfer start and end clock readings into this form if your timesheet requires HH:MM notation. Use the Pomodoro timer for structured focus blocks, then log billable totals here from actual clock times rather than cycle counts.

Remote workers spanning zones should still enter local clock times as they experienced them; use the meeting planner separately when scheduling the next client call. Home health aides documenting visit length can calculate each appointment before entering totals in agency software.

Export and audit trails

Copy decimal hours into invoices, timesheets, or grant reports immediately after calculating. The page does not retain history when you navigate away. For weekly audits, keep a simple spreadsheet with date, start, end, break, and computed total rather than relying on browser back navigation.

Seasonal employers hiring for 2026 peaks can print a month from monthly calendars and annotate daily totals calculated here before keying into payroll. Double-check AM/PM on split shifts that straddle noon.

Related tools

See the time tools hub for timers, Pomodoro, and world clock. Calendar spans and deadlines: date tools hub. Printable planning: 2026 yearly calendar. Use the stopwatch live, then enter start and end clock readings here when your agency form requires HH:MM fields rather than elapsed seconds.