By Tim King · Updated 1 October 2026

Working Hours Calculator

Daily, Weekly and Monthly Hours Plus Full-Time Equivalent From Your Schedule

No ratings yet

Usual start time

Usual finish time

Unpaid break (minutes)

Days per week

Full-time week (hours)

Result

—

OneTask is free, with no sign-up, and built by one person.
If this tool saved you time, a coffee helps keep new ones coming.

How the Working Hours Calculator works

This working hours calculator turns your usual start time, finish time, break and days a week into hours per day, week, month and year. Enter a full-time week to see your full-time equivalent, which is useful for part-time contracts, pro-rata pay and comparing job offers.

Job adverts, contracts and payslips all describe working time differently. One says 9 to 5:30, another 37.5 hours a week, a third 0.8 FTE, and a salary might be quoted per year while overtime is paid per hour. Converting your actual routine into each of those units makes it much easier to check a contract, compare offers and work out an hourly rate.

How the working hours calculator works

The calculator takes the time from start to finish, subtracting your unpaid break, to get the paid hours in a day. A finish time earlier than the start is treated as the next day, so night shifts work. The daily figure is multiplied by your days per week to get a weekly total, and half days are allowed, such as 4.5 days.

From the weekly figure:

Per month (average) multiplies by 52 weeks and divides by 12 months. Months are not exactly four weeks long, so this is an average across the year.
Per year (52 weeks) multiplies by 52 and rounds to whole hours. It does not take off holidays, which you can subtract yourself.
Full-time equivalent divides your weekly hours by the full-time week you enter.

Each daily and weekly figure is shown as h:mm and as decimal hours.

Worked example

Working 09:00 to 17:30 with a 30-minute unpaid lunch, five days a week, gives 8 hours a day and 40 hours a week. That is 173.3 hours a month on average and 2,080 hours a year. Against a 40-hour full-time week the FTE is 1.00.

The same day worked four days a week gives 32 hours, 138.7 hours a month, 1,664 hours a year and 0.80 FTE.

Understanding full-time equivalent

FTE expresses a working pattern as a fraction of a full-time post. An employee on 0.6 FTE works 60 percent of the full-time hours and is usually paid 60 percent of the full-time salary. Employers use FTE to budget headcount, and many benefits, such as paid leave, are scaled by it.

There is no single full-time week. Depending on the employer and country it may be 35, 37.5, 38, 39 or 40 hours, so enter the figure that your employer or the job uses. Using the wrong baseline is the most common reason two FTE figures for the same job do not match.

Turning a salary into an hourly rate

Divide an annual salary by your annual hours to get an hourly rate. A salary of 52,000 for 2,080 hours is 25 an hour. To be more precise, take off paid holidays and public holidays first. If you get 25 days of paid leave and 8 public holidays, that is 33 days × 8 hours = 264 hours fewer worked, so 1,816 hours, and the effective rate for time actually worked rises to about 28.63.

That effective rate is useful when comparing a salaried job with contract or freelance work, where days off are unpaid.

Annual hours and holidays

The yearly figure assumes 52 working weeks. To estimate actual hours worked, take your weekly hours, multiply by 52, and subtract your daily hours multiplied by the total days of leave and public holidays. For the 40-hour example with 33 days off, that gives 2,080 − 264 = 1,816 hours.

Paid and unpaid breaks

Only take off the break if it is unpaid. Many contracts pay short rest breaks but not a meal break, and some pay all of them. If you are not sure, check a payslip: if your paid hours match the full time from start to finish, breaks are paid and you should enter zero.

Common uses

Checking that a contract's stated weekly hours match your real start and finish times.
Working out the FTE of a part-time offer before negotiating pay.
Converting a shift pattern into annual hours for a budget or a grant application.
Comparing two jobs with different hours and salaries on a per-hour basis.
Planning a move from five days to four days a week.

How many hours a week adds up to over a month and year

The formula for the monthly average is weekly hours × 52 ÷ 12, the yearly figure is weekly hours × 52, and FTE is weekly hours divided by a 40-hour full-time week. For example, 32 hours a week is 138.7 hours a month and 1,664 a year, while 20 hours is 0.50 FTE. Each example below uses the same 40-hour baseline.

Weekly hours as monthly, yearly and FTE figures against a 40-hour week

Hours a week	Per month	Per year	FTE
16	69.3 h	832 h	0.40 FTE
17	73.7 h	884 h	0.42 FTE
18	78.0 h	936 h	0.45 FTE
19	82.3 h	988 h	0.47 FTE
20	86.7 h	1,040 h	0.50 FTE
21	91.0 h	1,092 h	0.53 FTE
22	95.3 h	1,144 h	0.55 FTE
23	99.7 h	1,196 h	0.57 FTE
24	104.0 h	1,248 h	0.60 FTE
25	108.3 h	1,300 h	0.63 FTE
26	112.7 h	1,352 h	0.65 FTE
27	117.0 h	1,404 h	0.68 FTE
28	121.3 h	1,456 h	0.70 FTE
29	125.7 h	1,508 h	0.72 FTE
30	130.0 h	1,560 h	0.75 FTE
31	134.3 h	1,612 h	0.78 FTE
32	138.7 h	1,664 h	0.80 FTE
33	143.0 h	1,716 h	0.82 FTE
34	147.3 h	1,768 h	0.85 FTE
35	151.7 h	1,820 h	0.88 FTE
36	156.0 h	1,872 h	0.90 FTE
37	160.3 h	1,924 h	0.93 FTE
38	164.7 h	1,976 h	0.95 FTE
39	169.0 h	2,028 h	0.97 FTE
40	173.3 h	2,080 h	1.00 FTE

Sources: Working time.

Checked against: 9:00 to 17:30 with a 30-minute break = 8 hours

FAQ

How many working hours are in a year?

At 40 hours a week over 52 weeks, a year has 2,080 working hours. At 37.5 hours it is 1,950. Subtract paid leave and public holidays to find the hours you actually work, which is typically between 1,700 and 1,900 for a full-time job.

How do I work out my FTE?

Divide your weekly hours by the employer's full-time weekly hours. Working 30 hours where full time is 37.5 gives 0.80 FTE. Enter both figures in the calculator to see the result to two decimal places.

Why is the monthly figure not four times the weekly hours?

A month averages about 4.33 weeks, not four. The calculator multiplies weekly hours by 52 and divides by 12, which gives the true average month. Multiplying by four undercounts by roughly a month's work each year.

Can I enter a half day?

Yes. Days per week accepts half days, such as 4.5. The calculator assumes each full day is the same length, so if your half day is a different length, add its hours to the weekly total yourself.