Is overtime always after 40 hours?

Under the US federal Fair Labor Standards Act (FLSA), yes for non-exempt employees: overtime pay at 1.5 times the regular rate kicks in after 40 hours in a workweek. But some states add daily overtime rules — California, for example, requires overtime after 8 hours in a single day — so check your state's labor rules too.

How do lunch breaks affect my total hours?

Unpaid lunch breaks are subtracted from your day: clock-out time minus clock-in time minus lunch time. A 30-minute lunch turns an 8.5-hour shift into 8 paid hours. This calculator subtracts the lunch minutes you enter for each day automatically.

How do I handle overnight shifts?

If your clock-out time is earlier than your clock-in time, this calculator treats it as an overnight shift and adds 24 hours — so 10:00 PM to 6:00 AM counts as 8 hours. Just enter your real times; the math handles the rest.

Are salaried employees eligible for overtime?

It depends. Some salaried employees are classified as exempt and do not earn overtime, but salaried non-exempt employees can still earn overtime for hours over 40 in a week. Your classification depends on your job duties and salary level under the FLSA — ask your employer or HR department if you are unsure.

Is this calculator free to use?

Yes. NumberTally Tools is completely free with no sign-up. All calculations run in your browser, and your entries are never sent to a server.

Work Hours Calculator

Enter your clock-in and clock-out times for each day, deduct your lunch breaks, and instantly see your weekly hours, regular pay, and overtime pay — all in one place. Now with per-day breakdowns, an overtime split, a daily-hours chart, and a shift-differential comparison.

Pay rate mode

Hourly rate ($)

Overtime after (hours)

Overtime multiplier

Daily times (leave blank for days off)

Advanced options

Shift differential (%)

Extra % added to your rate for evening/night shifts — used in the comparison below.

Round daily hours to

Total hours

0.00

Total pay

$0.00

Regular

0.00 h

Overtime

0.00 h

Daily breakdown

Day	In	Out	Lunch	Hours	Pay
Week total

How it's calculated

Hours per day

Shift-differential comparison

How weekly overtime works

In the U.S., the Fair Labor Standards Act requires overtime pay at 1.5× your regular rate for hours over 40 in a workweek. Some states and employers use different thresholds (e.g., daily overtime after 8 hours in California) — set the threshold above to match your situation. Overtime is based on hours worked; PTO and holidays may not count unless your employer says so.

Overnight shifts and rounding

If your clock-out time is earlier than your clock-in time, this calculator assumes an overnight shift and adds 24 hours automatically. Many employers round clock times to the nearest 15 minutes (the "7-minute rule"); choose your rounding above to mirror your timecard.

Frequently Asked Questions

How is overtime pay calculated?

Hours above your threshold are paid at rate × multiplier. Example: $20/hr × 10 OT hours × 1.5 = $300 in overtime pay, on top of $800 regular pay.

What if my shift crosses midnight?

Enter the actual times — if clock-out is earlier than clock-in, 24 hours are added automatically, so 10:00 PM to 6:00 AM counts as 8 hours.

Does lunch break count as paid time?

Unpaid lunch is deducted here. If your lunch is paid, enter 0 minutes. Short rest breaks (under ~20 minutes) are usually paid work time.

What is a shift differential?

Extra pay per hour for less-desirable shifts (evenings, nights, weekends), often 5–15% above base rate. Enter it under Advanced options to see the weekly difference.

How does overtime work with two different pay rates?

Under the FLSA, your overtime premium is based on the weighted-average regular rate: total straight-time earnings divided by total hours. Switch to “Two rates” mode above and the calculator does this math for you — e.g. $20×30h + $30×20h gives a $24 regular rate.

Is 40 hours always the overtime threshold?

Federally yes, but some states require daily overtime after 8 hours, and some employers pay OT after 37.5 or 35 hours. Change the threshold to match your policy.