How to calculate hours worked in Excel

Excel handles timesheet math well, and Everhour keeps approved weekly hours ready for payroll and billing review.

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$
Weekly gross pay
Regular hours40h
Overtime hours0h
Regular pay$1,400.00

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Acme Web Project
1
50% of budget used
$2,500.00of $5,000.00
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Your Company LLChello@yourcompany.com
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Invoice #1042
Group by:
DescriptionHoursRateAmount
Website Redesign14h$150/h$2,100.00
Brand Guidelines7h$150/h$1,050.00
Marketing Strategy3.5h$150/h$525.00
Total Due$3,675.00
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Excel timesheet math for payroll and billing

What this calculation answers

Excel can answer the practical timesheet question: how many payable hours sit between a clock-in and clock-out after valid unpaid breaks. Same-day rows usually subtract start time from end time. Overnight or multi-day rows need start date/time and end date/time because time-only entries do not show which day the clock-out belongs to.

The result can feed payroll, billing, job costing, or a weekly overtime review. For U.S. payroll, keep the Excel math separate from the legal classification. Covered, nonexempt employees must receive overtime pay for hours worked over 40 in a fixed FLSA workweek at not less than one and one-half times the regular rate.

Set up Excel time correctly

Excel stores time as a fraction of a day, so a time span becomes usable payroll math only after Excel converts it into hours. The common structure is end date/time minus start date/time, then multiplied by 24 for decimal hours. A 9:00 AM to 5:30 PM row with no break produces 8.5 decimal hours.

Weekly totals need special formatting. A normal time format wraps after 24 hours, so 28:15 can display as 4:15. Use a duration format such as [h]:mm when totals can exceed one day. CSV imports also need attention because Excel may interpret dates and times using the computer's default settings unless you import the file with explicit column formats.

Apply breaks and overtime

Subtract only unpaid break time from gross elapsed time. Federal law does not require lunch or coffee breaks for adult employees, but when an employer provides short breaks of 20 minutes or less, the FLSA treats them as compensable hours worked. A bona fide meal period is generally unpaid only when the employee is completely relieved of duty.

For example, a covered nonexempt employee works 49 paid hours in one fixed workweek at $31.50 per hour. Regular pay covers 40 hours, which equals $1,260.00. Overtime covers 9 hours at $47.25, which equals $425.25. Total gross pay before taxes and deductions is $1,685.25.

Know where Excel ends

Excel is enough for a one-off check, a small manual timesheet, or a quick reconciliation before payroll. It works best when one person controls the workbook, formulas stay visible, and the calculation uses a simple weekly rule. The risk rises when multiple people edit rows, import CSV files, change formulas, or apply different break and overtime rules across locations.

A managed workflow becomes the better fit when hours need approval, rejection, partial approval, locking, or a reliable handoff to payroll and billing. Everhour Timesheets collect weekly project hours and working hours by person, then let managers approve submitted time before those totals become billing, reporting, or payroll inputs.

This content is for general information only, may not be fully up to date, and is provided without any warranty or liability.

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Frequently Asked Questions

Why does Excel sometimes show the wrong weekly total?

Excel can display the wrong-looking total when the cell uses ordinary time formatting. Time formats wrap after 24 hours, so 28 hours and 15 minutes can appear as 4:15. Use a duration format such as [h]:mm for weekly or pay-period totals that exceed 24 hours.

What Excel formula structure converts time to decimal hours?

The structure is end date/time minus start date/time, multiplied by 24. Excel stores time as a fraction of a day, so multiplying by 24 turns the elapsed span into decimal hours for payroll or billing. Overnight shifts need full date-time values, not time-only entries.

Which break entries should stay in the paid total?

Short breaks of 20 minutes or less stay in the paid total under the FLSA. A meal period is unpaid only when it is typically at least 30 minutes and the employee is completely relieved from duty. Work performed during a meal period remains hours worked.

Can Excel calculate overtime automatically?

Excel can flag weekly hours over 40 and split regular and overtime lines with formulas. The workbook still needs correct worker classification, workweek boundaries, rates, and state-specific overlays. For covered nonexempt employees, the federal baseline is overtime after 40 hours in a fixed workweek at not less than 1.5 times the regular rate.

Why should CSV timesheet imports be checked before calculating?

Excel opens CSV files using the computer's default data-format settings, so date and time columns can load incorrectly. The Text/CSV import flow gives more control over column formats before Excel loads the data. Check AM/PM values, overnight rows, and date columns before using formulas.

How do Everhour Timesheets support Excel-based payroll review?

Everhour Timesheets collect weekly project hours and working hours by person, then let managers approve, reject, partially approve, and lock submitted time. Approved totals give payroll and billing reviewers a cleaner source before they export or reconcile hours in Excel.

Move approved hours into payroll review

Track weekly hours through Everhour Timesheets, approve or reject submissions, and lock completed periods before spreadsheet reconciliation. Everhour gives payroll and billing review a controlled time record.

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