Skip to content
TimesheetCalculator

Monthly · full calendar

Monthly Timesheet Calculator

Pick a month and log every dated day — lunch deductions, weekly overtime allocation inside the month, and a monthly total ready for invoicing or payroll.

Monthly Timesheet — enter start time, end time and unpaid break for each day
Day Start End Break (min) Total

Type times like 9, 9:30a, 17:30. Breaks in minutes (30) or 0:45. Overnight shifts (10 PM → 6 AM) are handled automatically. Use + split for a second work period in a day.

Monthly hours reference

Weekdays in month@ 8 h/day@ 7.5 h/day
20160 h150.0 h
21168 h157.5 h
22176 h165.0 h
23184 h172.5 h
Full-time monthly average173.33 h162.5 h

Key takeaways

  • Months have 20–23 weekdays, so monthly hours swing by up to 24 hours at full time.
  • The 173.33 h/month figure is the annual average (2,080 ÷ 12), used to convert salary ↔ hourly.
  • Overtime is computed per workweek inside the month — this sheet does that automatically.
  • Freelancers: export the month as CSV and attach it to your invoice; the free PDF makes it client-ready.
  • Semimonthly pay (24 paychecks/yr)? Track the month here and split at the 15th when invoicing.

Frequently asked questions

How do I calculate hours worked in a month?
Add each workday’s paid hours (end − start − unpaid breaks) for every day of the calendar month. The result varies by month: a month with 22 weekdays at 8 hours/day is 176 hours; with 20 weekdays it’s 160. Pick the month above and the grid shows the right number of dated rows.
How many work hours are in a month?
On average 173.33 hours (2,080 full-time hours ÷ 12 months), but actual months range from about 160 to 184 hours depending on how many weekdays they contain. Payroll that pays “monthly salary ÷ hours” uses the 173.33 average.
How is overtime handled on a monthly timesheet?
Overtime never works per month — it is allocated inside each workweek (over 40 hours/week federally, plus daily rules in some states). This calculator groups the month’s days into workweeks based on your week-start day and computes overtime per week, which is what makes its monthly totals payroll-accurate.
Is this useful for salaried employees?
Yes, for tracking rather than pay: many salaried/exempt employees still log monthly hours for projects, clients or personal records. Enter the days you worked and export the month as CSV, Excel or a PDF report — all free.
Can I switch months without losing data?
Switching months keeps your day entries in the browser (rows are matched by day number), but each device stores one monthly sheet at a time — export to CSV or PDF before starting a new month if you want an archive.

Related calculators

TS

Timesheet Calculator

Turn a paper or digital time sheet into totals: hours in hh:mm and decimal, breaks, overtime and pay.

 BW

Biweekly Timesheet Calculator

A 14-day time card with per-week overtime subtotals — built for biweekly payroll periods.

 W7

Weekly Timesheet Calculator

Calculate a full work week day by day, with weekly overtime after 40 hours and gross pay.

 PR

Payroll Hours Calculator

Convert payroll hours into gross pay for weekly, biweekly, semimonthly or monthly pay periods.

 WH

Work Hours Calculator

Calculate hours worked from start and end times, minus breaks — supports overnight shifts.

 DH

Decimal Hours Calculator

Convert hours:minutes to decimal hours (and back) with the full minutes-to-decimal payroll chart.