12-Hour Shift With a 30-Minute Lunch: How Many Paid Hours?
A 12-hour shift with an unpaid 30-minute lunch is 11.5 paid hours. Paid hours for every common shift and break length, FLSA break rules, and a calculator.
A 12-hour shift with an unpaid 30-minute lunch is 11.5 paid hours. You are on site for 12 hours, the half-hour meal is deducted, and 11.5 hours go on your paycheck. Three of those shifts in a week come to 34.5 hours, not 36. If the lunch is paid, the answer is simply 12.
Shift and break calculator
Paid hours by shift length and break length
Paid hours = shift length minus the unpaid break. Rest breaks of 5 to 20 minutes are paid under federal rules and are not deducted, so only count the meal period in the break column.
| Shift on site | No unpaid break | 15 min | 30 min | 45 min | 60 min |
|---|---|---|---|---|---|
| 8 hours | 8.00 | 7.75 | 7.50 | 7.25 | 7.00 |
| 8.5 hours | 8.50 | 8.25 | 8.00 | 7.75 | 7.50 |
| 9 hours | 9.00 | 8.75 | 8.50 | 8.25 | 8.00 |
| 10 hours | 10.00 | 9.75 | 9.50 | 9.25 | 9.00 |
| 12 hours | 12.00 | 11.75 | 11.50 | 11.25 | 11.00 |
Read the table as hours, not hours and minutes: 11.50 means 11 hours 30 minutes, and 11.25 means 11 hours 15 minutes. If your timesheet asks for h:mm, the minutes to decimal chart converts either way.
Weekly totals for common schedules
| Schedule | Unpaid break each shift | Paid hours per week | Federal overtime |
|---|---|---|---|
| 3 × 12-hour shifts | 30 min | 34.5 | None |
| 3 × 12-hour shifts | 60 min | 33.0 | None |
| 3 × 12-hour shifts | None (paid lunch) | 36.0 | None |
| 4 × 12-hour shifts | 30 min | 46.0 | 6 hours |
| 4 × 10-hour shifts | 30 min | 38.0 | None |
| 5 × 8-hour shifts | 30 min | 37.5 | None |
| 5 × 8.5-hour shifts | 30 min | 40.0 | None |
The 5 × 8.5 row explains a scheduling habit you will see everywhere: an employer that wants a true 40-hour week and an unpaid half-hour lunch has to schedule 8.5 hours on site. Likewise a "12-hour" nursing shift that pays 12 hours is often 12.5 hours door to door.
Paid breaks vs unpaid breaks
The Fair Labor Standards Act does not require employers to give any breaks. What it does say, in 29 C.F.R. § 785.18 and § 785.19, is how breaks must be treated when they are given:
- Short rest breaks (about 5 to 20 minutes) are counted as hours worked. They are paid and they count toward overtime. An employer cannot deduct two 15-minute breaks from a shift.
- Bona fide meal periods (normally 30 minutes or more) can be unpaid, but only if you are completely relieved of duty. Eating at your workstation while covering the phone is not a relieved break; it is work time.
- Interrupted meals are work time. If you are called back after 15 minutes of a 30-minute lunch, the employer cannot deduct the full 30.
Many states go further. California, for example, requires a 30-minute unpaid meal period before the end of the fifth hour of work and a second meal period on shifts over 10 hours, plus a paid 10-minute rest break for every 4 hours worked or major fraction of it. On a 12-hour California shift that is two meal periods (the second can be waived by written agreement if the first was taken) and three rest breaks. Washington, Oregon, Colorado, New York, and others have their own meal-break statutes. If you regularly work through lunch and still see 30 minutes deducted, that is the first thing to raise with payroll.
Why three 12s is 34.5 and not 36
Three 12-hour shifts sounds like 36 hours, and people budget around 36. With a 30-minute unpaid meal each day, the paid total is 3 × 11.5 = 34.5 hours, which is 1.5 hours a week or 78 hours a year less than 36. At $30 an hour that is $2,340 a year. It matters for benefit eligibility too: some employers set full-time status at 36 paid hours, and a 34.5-hour week misses it. Ask whether "full time" is measured in scheduled hours or paid hours before assuming a three-12s job qualifies.
A fourth 12 in the same week takes the total to 46 paid hours, so 6 of those hours are federal overtime at 1.5 times the regular rate. Under California's daily rule each 12-hour day already carries 3.5 hours of daily overtime (hours 8 through 11.5), which is a different calculation entirely. The daily overtime by state guide walks through both.
How to check your own paycheck
- Write down your clock-in and clock-out time for each shift. Use the hours between times calculator if the shift crosses midnight.
- Subtract only the unpaid meal period. Do not subtract rest breaks.
- Convert to decimal hours: 11 hours 30 minutes is 11.50, not 11.30.
- Add the shifts in the pay week. Compare the total to the hours line on your pay stub.
- If the week is over 40, multiply the extra hours by 1.5 times your rate and compare that to the overtime line. The overtime pay calculator does this for you.
For a full week with different start and end times each day, the time card calculator handles the breaks, the decimal conversion, and the overtime split at once. The step-by-step method is written out in how to calculate hours worked.
Frequently asked questions
How many paid hours is a 12-hour shift with a 30-minute lunch?
11.5 hours, if the lunch is unpaid. 12 hours minus 0.5 hours equals 11.5. If your employer pays the lunch (for example because you must stay at your station), all 12 hours are paid.
Is a 12-hour shift really 12 hours of work?
Usually not. In most hospitals, plants, and warehouses a 12-hour shift is 12 hours on site with a 30- or 60-minute unpaid meal inside it, so pay is for 11.5 or 11 hours. Some employers schedule 12.5 hours on site so the paid time comes to 12.
How many hours is three 12-hour shifts a week?
34.5 paid hours with an unpaid 30-minute lunch each day (3 × 11.5), or 36 hours if there is no unpaid break. That is why many three-12s schedules are called full time even though they land under 40.
Do I get overtime on a 12-hour shift?
Under federal law only if your weekly total passes 40 hours. Three 11.5-hour days is 34.5 hours, so no federal overtime. In California, Alaska, and a few other states, hours over 8 (or over 12 in Colorado) in a single day earn overtime regardless of the weekly total. See the daily overtime by state guide.
Can my employer deduct 30 minutes if I worked through lunch?
No. Under the FLSA a meal break is only unpaid if you are completely relieved of duty. If you ate at your desk while answering calls, or were called back before the break ended, the time is work time and must be paid.
Are 15-minute breaks paid?
Federal regulations treat short rest breaks of roughly 5 to 20 minutes as paid work time. They do not reduce your hours. Only bona fide meal periods, normally 30 minutes or longer, can be unpaid.
What about a 12-hour shift with two 15-minute breaks and a 30-minute lunch?
Still 11.5 paid hours. The two 15-minute rest breaks are paid time and stay in the total; only the 30-minute unpaid meal comes off.
Last updated 2026-09-16. Everything on this page runs in your browser. Nothing you type or upload leaves your device.