Hours Calculator: Work Hours & Payroll

Q: How are minutes converted to decimal hours?

We use decimal hours=minutes÷60decimal hours = minutes ÷ 60decimal hours=minutes÷60. So 30 min = 0.5 hours, 15 min = 0.25, 45 min = 0.75. For 8h 30m: 8 + 30/60 = 8.5. Payroll and billing systems expect this format.

Work Hours, Payroll Decimals & Across-Midnight Logic

Whether you're logging a shift, billing time, or measuring a project span—hours matter. This calculator covers same-day time ranges with optional break deduction, plus multi-day date ranges with precise start and end timestamps.

What This Calculator Does

Time Range (Same Day or Overnight)

Enter start and end times in 12-hour format. Add an optional break deduction (minutes or hours). If end is before start, we assume an overnight shift into the next day. Handy for time cards and single-shift billing.

Hours Between Two Dates

Pick exact start and end dates plus times. The calculator returns total hours, a days-hours-minutes breakdown, decimal hours, and total minutes. Use it for project timelines, invoice spans, or any duration that crosses multiple days.

Decimal Hours for Payroll

Payroll systems often want decimal hours. We convert with

\text{decimal} = \text{hours} + \text{minutes} \div 60

. 8h 30m → 8.5; 15 min → 0.25; 45 min → 0.75. The result card shows both the breakdown and decimal format.

Across Midnight Logic

For Time Range mode: when end time is before start (e.g., 11 PM to 7 AM), we treat the end as the next calendar day. A 10 PM–6 AM shift correctly yields 8 hours. No manual day math needed.

Hours Calculator: Time Between Two Times, Work Hours & Payroll Decimal

Calculate total hours between two times or across two dates. Supports overnight shifts, break deduction, payroll decimal format, and multi-day spans. Free, runs locally, no sign-up.

How to Use the Hours Calculator

Time Range suits same-day or overnight shifts. Enter start and end times (12-hour, AM/PM), optionally deduct a break. If the end is before the start, we assume an overnight shift—no extra clicks. Hours Between Two Dates handles multi-day spans: pick start date + time and end date + time. Results show total hours, a days-hours-minutes breakdown, decimal hours, and total minutes.

Decimal Hours for Payroll & Time Billing

Many payroll and billing systems expect decimal hours. The core conversion is

\text{decimal hours} = \text{minutes} \div 60

. Examples: 30 min = 0.5, 15 min = 0.25, 45 min = 0.75. For 8 hours 30 minutes: 8 + 30/60 = 8.5. The calculator displays both the human-readable breakdown and the decimal value.

Across Midnight: Overnight Shifts

When the end time is chronologically before the start time (e.g., 11 PM to 7 AM), we assume the end falls on the next calendar day. That "across midnight" logic matches how graveyard and swing shifts work. The calculator explicitly notes when an overnight shift is detected, so you know the result is correct without manual day arithmetic.

Hours Calculator FAQ

? How do I calculate hours between two times?

Use Time Range mode: enter start and end times with AM/PM, then optionally deduct a break. If the end time is earlier than the start (e.g., 11 PM to 7 AM), we treat it as an overnight shift and add 24 hours to the end time. For spans across multiple days, use Hours Between Two Dates and pick exact start and end dates and times.

? How are minutes converted to decimal hours?

We use

\text{decimal hours} = \text{minutes} \div 60

. So 30 min = 0.5 hours, 15 min = 0.25, 45 min = 0.75. For 8h 30m: 8 + 30/60 = 8.5. Payroll and billing systems expect this format.

? What is the difference between Time Range and Hours Between Two Dates?

Time Range is for same-day or overnight shifts (one calendar day). Hours Between Two Dates handles multi-day spans—pick start date + time and end date + time. Use the second mode for project tracking, billing across weeks, or any span that crosses multiple calendar days.

? Why does my overnight shift show "calculated as an overnight shift"?

When the end time is chronologically before the start time (e.g., 10 PM–6 AM), we assume the end is on the next calendar day. That's the "across midnight" logic—common for graveyard and swing shifts. The calculator makes this explicit so you know it's correct.

Hours Calculator: Work Hours, Payroll Decimal & Multi-Day Spans

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