Does this calculator apply overtime rates automatically?

No — this calculator outputs raw hours only. Multiply your hours by the applicable rate from your Enterprise Bargaining Agreement (EBA) or Modern Award. Rates vary significantly between hospitals and states.

How do I enter a 12-hour shift?

Simply enter your start and end times. 07:00–19:30 with a 30-minute break = 12 hours worked. The calculator handles any shift length automatically.

Are my breaks paid or unpaid?

This depends on your EBA. Most nurses are entitled to one paid and one unpaid break in an 8-hour shift. Check your enterprise agreement. The calculator defaults to unpaid break deduction — override if your breaks are paid.

Shift Hours & Overtime — Free Nurses Calculator

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Three extra shifts this week and payroll wants the hours by 5 pm. Your roster app is down and you need the totals before the payroll email closes.

Shift Hours & Overtime

Shift

Start time (24h)

End time (24h)

Overnight: add 24 → 06:30 = 30.5

Unpaid break (min)

Contracted hrs/day

Hours = (End − Start) − (Break ÷ 60) Overnight example: start 22:00, finish 06:30 → enter end as 30.5

Check your employment contract and award for overtime entitlements. Fair Work Australia — Overtime

⚕️ Clinical safety: 🇦🇺 Verify with facility drug formulary and senior clinician · Meets AHPRA/ACSQHC standards

1 What this calculator does

Calculates total hours worked, break deductions, and flags overtime for any shift entered. Handles overnight shifts, multiple shifts in one day, and applies the standard 30-minute break deduction at configurable thresholds. Outputs hours in decimal and hours:minutes format for payroll.

2 Formula & professional reasoning

Hours worked = End time − Start time − Break time
For overnight shifts: add 24 hours to end time if end < start
Overtime = hours worked − standard shift length (usually 8 hrs)

Nursing pay in Australia is governed by the relevant modern award (Nurses Award 2020 or enterprise agreement). Overtime typically applies after 8 hours in a day or 38 hours in a week, with penalty rates applying for work beyond these thresholds, for night shifts, weekends and public holidays. The calculator provides the raw hours — refer to your EBA for the applicable rates.

3 Worked examples

⚠️ Illustrative example only — not clinical or professional instruction.

Basic

Standard day shift

Given: Start: 07:00 · End: 15:30 · Break: 30 min

Working: 15:30 − 07:00 = 8:30 − 0:30 break

Answer: 8 hours worked

💡 Standard 8-hour day shift. No overtime.

Standard

Extended evening shift

Given: Start: 14:00 · End: 23:15 · Break: 30 min

Working: 23:15 − 14:00 = 9:15 − 0:30 break

Answer: 8 hours 45 minutes (8.75 hrs)

💡 45 minutes overtime at applicable penalty rate. Check your EBA for the overtime multiplier.

Advanced

Overnight shift

Given: Start: 22:30 · End: 07:00 next day · Break: 30 min

Working: 07:00 + 24:00 = 31:00 − 22:30 = 8:30 − 0:30

Answer: 8 hours worked

💡 Standard night shift. Night shift penalties typically apply — check your award for applicable allowances.

4 Sanity check

Standard nursing shifts

8 hours (day/afternoon/night), 10 or 12 hours in some units

ICU, ED and some wards run 12-hour shifts — adjust standard length accordingly.

Break deduction

Usually 30 min unpaid after 5–6 hours

Some agreements have paid breaks — check your EBA before deducting.

Overtime threshold

Most awards: > 8 hrs/shift or > 38 hrs/week

Enterprise agreements may have different thresholds. Use this as a flag — confirm with payroll.

Public holiday calculation

Time-and-a-half or double time — award dependent

This calculator outputs raw hours only — multiply by your applicable rate.

5 Common errors

Error	Cause	Consequence	Fix
Not adjusting for overnight shift	Subtracting start from end without accounting for midnight crossover	Negative hours result	The calculator detects overnight shifts automatically — if end time < start time, 24 hours are added
Forgetting to subtract the break	Entering hours without selecting break duration	Paid 30 min extra per shift	Select the correct break duration — most nursing awards mandate 30 min unpaid break per 8-hour shift
Confusing decimal hours with hours:minutes	Entering 8.5 hours as 8 hours 50 min on a timesheet	30-minute underpayment per shift	8.5 decimal hours = 8 hours 30 minutes. The calculator shows both formats.
Not recording actual vs rostered hours	Assuming rostered = worked	Overtime not claimed when nurse worked longer than rostered	Enter actual start and finish times from your personal record, not the roster

6 Reference & regulatory links

🇦🇺 Australia

🇺🇸 United States

7 Professional workflow

Common tools used alongside this one:

🕰️

Military Time Converter

Use Military Time Converter if your shift is recorded in 24-hour format and you need to convert for a form requiring 12-hour time

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🧠

Glasgow Coma Scale (GCS)

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Input	Result
07:00–15:30, 30 min break	8 hrs
22:30–07:00, 30 min break	8 hrs
07:00–19:30, 60 min break	11.5 hrs