Shift Work Calculator
Calculate hours for shifts that cross midnight (overnight), with break deduction and overnight-shift detection for night workers.
What this calculator does
- Built on official FLSA federal labor standards (29 CFR Part 541, effective May 15, 2026).
- Results include a plain-English interpretation of what the numbers mean for your situation.
- All math happens locally — your data never leaves your device.
Shift Times
Shift Hours
How this calculation works
Overnight shifts that cross midnight require special handling: if the end time is earlier than the start time, the shift wraps into the next day.
Federal law does not require a night-shift pay premium, though many employers offer one.
How this Shift Work Calculator works — 2026 guide
Shifts that cross midnight break every normal timecard assumption — if you clock in at 22:00 and out at 06:00, the end time is numerically "earlier" than the start. This shift work calculator handles the wrap automatically: it detects the overnight crossing, adds 24 hours to the end time, subtracts your unpaid break, and returns the true hours worked. It also flags night-shift hours so you can see how much of your week qualifies for any shift differential your employer pays (federal law doesn't require one, but many employers add $1–$3/hour for night work).
How to use it in 3 steps
- Enter your clock-in and clock-out time for each shift, including overnight shifts that cross midnight.
- Add an unpaid break length — it is deducted before the total is computed.
- Read hours per shift, the weekly total, and a night-hours breakdown for differential math.
Who this is for
Nurses and overnight healthcare staff, warehouse and factory shift workers, and managers scheduling across midnight. Read the [overnight shift hour calculation guide](/blog/rules-for-overnight-shift-work-hour-calculation/), the [night shift differential pay guide](/blog/how-to-calculate-night-shift-differential-pay/), and the [shift differential pay overview](/blog/shift-differential-pay/) for the pay side.
Data sources & authoritative references
This calculator is built on official U.S. rules and published statistics. Key sources:
Frequently Asked Questions
How are overnight shifts calculated?
Is night shift premium required by federal law?
Related Guides
Related Calculators
Data Sources & Fact-Checking Methodology
✓ Audited for 2026 Tax Year- Standard formulas Amortization, compound interest, and retirement projection equations per finance practice.
- Public reference rates Savings/investment assumptions stated as planning estimates; no live market rates.
- Internal editorial Calculators reviewed by the AllMoneyCalc editorial team before publication.
All calculations are independently vetted by credentialed practitioners (IRS Enrolled Agent & CFA) against statutory primary sources: 26 U.S. Code § 1(j) (Tax Cuts and Jobs Act rates), IRS Rev. Proc. 2025-32, 29 CFR Part 541 (FLSA labor rules), and CFPB Regulation Z. Models undergo continuous automated verification against synthetic test cases.
Methodology and citations are maintained by the AllMoneyCalc editorial board. Educational tools only; verify specific personal filing situations with a qualified tax professional.