Hours Calculator

Live work-time total from start/end segments - shift presets, unpaid breaks, overnight handling, and decimal hours so timesheets and payroll speak the same language.

Exact clock math only. Rounding rules, overtime rates, and wage calculations depend on your employer and jurisdiction - not this panel.

By Ahmet C. Toplutaş·Site owner & editor · Time & payroll tools

Last updated May 21, 2026 · Reviewed May 21, 2026 · Planning estimates only - not tax, medical, or investment advice

Clock time is not always paid time

This calculator answers a narrow question: how long was I on the clock, after unpaid breaks? That number feeds timesheets, invoices, and payroll - but it is not your paycheck. Wage rules, overtime multipliers, and rounding policies sit one layer above.

Two formats collide constantly. HH:MM (7 hours 30 minutes) is how people talk. Decimal hours (7.50) is how many systems store and bill. Mixing them - typing 7.30 when you mean 7:30 - is a classic under/overpayment bug. The panel shows both so you can match the format your stub expects.

The “vs 8-hour day” line is a planning baseline, not a legal overtime verdict. Daily vs weekly overtime, exemptions, and rates depend on jurisdiction and policy.

Overnight shifts without the day-math headache

When end time is earlier than start time (22:00 → 06:00), the span crosses midnight. The panel adds 24 hours automatically. Enter the times on the wall clock - do not invent a “next day” end hour unless your system requires it.

Split days (morning out, afternoon back) are better as two segments than one fake continuous block. Use the Split day preset or + Add segment so lunch is either a gap between segments or an unpaid break total - not both double-counted.

Which minutes leave the total

Enter unpaid break minutes only. Paid rest breaks usually stay inside worked time. Unpaid meal breaks usually come out. If your handbook treats a 30-minute lunch as unpaid, put 30 in the break field (or split the day around lunch and leave break at 0).

Double-counting is the trap: splitting 09–12 and 13–17 and subtracting a 60-minute break removes the lunch twice. Pick one model.

Worked scenarios

A · Standard office day. 09:00– 17:00 with 30 unpaid minutes → net 7h 30m (7.50 decimal). Tap Office day to match. vs 8h day shows −30m - expected after lunch.

B · Night shift. 22:00–06:00 with 30m unpaid → net 7h 30m again, but the overnight flag matters for how you describe the shift on a paper timesheet. Use Night shift.

C · Freelancer billable block. 09:00–12:00 and 13:00–17:00 with break 0 (lunch already outside segments) → net 7h 00m (7.00). Invoice in decimal if the client’s portal demands it; keep HH:MM in your own notes.

Formula

Net minutes = Σ (end − start) − unpaid breakIf end < start, end += 24×60. Decimal hours = net minutes ÷ 60.

Example: 09:00–17:00 is 480 minutes; minus 30 break = 450 → 7 hours 30 minutes = 7.50 decimal hours.

When not to trust this number alone

Your employer rounds punches (for example to the nearest 5 or 15 minutes) under a published policy - DOL guidance allows rounding when it is neutral over time.
You need overtime pay - that needs rate, weekly totals, and legal rules. See salary tools only as loose helpers; payroll software wins.
You are comparing calendar days or business-day counts - use a date calculator or workday calculator instead.

How to use this panel

Pick a shift preset close to your day, or type 24-hour HH / MM fields.
Add a second segment for split shifts; avoid double-counting lunch.
Set unpaid break minutes to match policy (0 if lunch is already outside segments).
Read HH:MM and decimal together - copy the format your timesheet or invoice portal wants.
Use “vs 8-hour day” as a sanity check, not as an overtime determination.

FAQ

How do overnight shifts work?

If end time is earlier than start time (for example 22:00 to 06:00), the calculator adds 24 hours so the span crosses midnight. Enter the clock times you actually worked - do not pre-add a day.

What is decimal hours and when do I need it?

Decimal hours convert minutes to a fraction of an hour (7 hours 30 minutes = 7.50). Many payroll and billing systems store time that way. Always check whether your system expects HH:MM or decimal before you paste a number into a timesheet.

Does this calculate overtime pay?

No. It totals duration and optionally shows how that day compares to an 8-hour baseline. Overtime rules (daily vs weekly, rate multipliers, exemptions) depend on jurisdiction and employer policy - use this total as an input to payroll rules, not as the wage result.

Should unpaid breaks be subtracted?

Usually yes for unpaid meal breaks. Paid rest breaks often stay in worked time. Enter only the minutes that should come out of the paid total for your policy - wrong break handling is a common timesheet dispute.

Why might payroll show a different total?

Rounding (to the nearest 5 or 15 minutes), grace windows, and clock-in rules can change the paid figure. FLSA allows some rounding when it is neutral over time. Treat this panel as exact clock math; match your employer’s rounding policy for the stub.

Can I add multiple segments in one day?

Yes. Use split-day presets or add another time entry for lunch-out / second shift. Breaks can be entered once as a total or reflected by splitting segments around unpaid time.

Sources

Loading…

EMBED

Embed this calculator

Paste the iframe on a blog or docs page. Embed URLs stay out of the sitemap so they do not compete with the full calculator page.

Preview

<iframe src="https://howtocalculate.app/embed/other/hours-calculator" title="Hours calculator" width="100%" height="560" loading="lazy" style="border:1px solid #d6d3d1;border-radius:6px;max-width:100%;" referrerpolicy="no-referrer-when-downgrade"></iframe>

Clock time is not always paid time

The “vs 8-hour day” line is a planning baseline, not a legal overtime verdict. Daily vs weekly overtime, exemptions, and rates depend on jurisdiction and policy.

Overnight shifts without the day-math headache

Which minutes leave the total

Double-counting is the trap: splitting 09–12 and 13–17 and subtracting a 60-minute break removes the lunch twice. Pick one model.

Worked scenarios

A · Standard office day. 09:00– 17:00 with 30 unpaid minutes → net 7h 30m (7.50 decimal). Tap Office day to match. vs 8h day shows −30m - expected after lunch.

B · Night shift. 22:00–06:00 with 30m unpaid → net 7h 30m again, but the overnight flag matters for how you describe the shift on a paper timesheet. Use Night shift.

When not to trust this number alone

Your employer rounds punches (for example to the nearest 5 or 15 minutes) under a published policy - DOL guidance allows rounding when it is neutral over time.
You need overtime pay - that needs rate, weekly totals, and legal rules. See salary tools only as loose helpers; payroll software wins.
You are comparing calendar days or business-day counts - use a date calculator or workday calculator instead.

How to use this panel

Pick a shift preset close to your day, or type 24-hour HH / MM fields.
Add a second segment for split shifts; avoid double-counting lunch.
Set unpaid break minutes to match policy (0 if lunch is already outside segments).
Read HH:MM and decimal together - copy the format your timesheet or invoice portal wants.
Use “vs 8-hour day” as a sanity check, not as an overtime determination.

FAQ

How do overnight shifts work?

If end time is earlier than start time (for example 22:00 to 06:00), the calculator adds 24 hours so the span crosses midnight. Enter the clock times you actually worked - do not pre-add a day.

What is decimal hours and when do I need it?

Does this calculate overtime pay?

Should unpaid breaks be subtracted?

Why might payroll show a different total?

Can I add multiple segments in one day?

Yes. Use split-day presets or add another time entry for lunch-out / second shift. Breaks can be entered once as a total or reflected by splitting segments around unpaid time.

Hours Calculator

Clock time is not always paid time

Overnight shifts without the day-math headache

Which minutes leave the total

Worked scenarios

Formula

When not to trust this number alone

How to use this panel

FAQ

How do overnight shifts work?

What is decimal hours and when do I need it?

Does this calculate overtime pay?

Should unpaid breaks be subtracted?

Why might payroll show a different total?

Can I add multiple segments in one day?

Sources

Embed this calculator

Clock time is not always paid time

Overnight shifts without the day-math headache

Which minutes leave the total

Worked scenarios

Formula

When not to trust this number alone

How to use this panel

FAQ

How do overnight shifts work?

What is decimal hours and when do I need it?

Does this calculate overtime pay?

Should unpaid breaks be subtracted?

Why might payroll show a different total?

Can I add multiple segments in one day?

Sources

What this number means

Share your calculation