How do I calculate hours between two times?

Convert both times to minutes since midnight, then subtract the start time from the end time. For example, 9:00 AM (540 minutes) to 5:30 PM (1050 minutes): 1050 - 540 = 510 minutes = 8 hours and 30 minutes. If the end time is earlier than the start time (like 11 PM to 2 AM), the calculator automatically assumes you mean the next day.

What is decimal hours and why is it useful?

Decimal hours express time as a decimal number where 0.5 hours = 30 minutes and 0.25 hours = 15 minutes. This format is useful for payroll, billing, and project tracking because it's easier to calculate: 8.5 hours at $20/hour = $170. Converting: divide minutes by 60. For example, 8 hours 30 minutes = 8 + (30/60) = 8.5 hours.

How does the calculator handle overnight shifts?

If your end time is earlier than your start time, the calculator assumes you worked through midnight and automatically adds 24 hours to the end time. For example, starting at 11 PM (23:00) and ending at 2 AM (02:00) next day is calculated as 11 PM to 2 AM the following day, resulting in 3 hours. No need to enter dates separately.

How do I calculate hours and minutes worked per day?

Use this calculator to find total duration. If you worked 9:30 AM to 5:45 PM, the calculator shows 8 hours and 15 minutes (8.25 decimal hours). For multi-day calculations, add up the daily totals. If you work 8.25 hours today and 7.5 hours tomorrow, your total is 15.75 hours for the two days.

Can I use this for billing or payroll purposes?

Yes, absolutely. The decimal hours format is standard for billing and payroll software. Simply multiply decimal hours by your hourly rate to calculate pay. For example, 8.5 hours at $25/hour = 8.5 × $25 = $212.50. Many employers also round to the nearest quarter hour (0.25, 0.5, 0.75), so check your company's rounding rules.

Hours Calculator

Calculate total hours and minutes between two times. Perfect for tracking work shifts, overnight hours, project duration, and time tracking. Handles overnight shifts automatically.

How to Use This Hours Calculator

To calculate hours between two times:

Enter Start Time: Input the hour (0-23) and minute (0-59) in 24-hour format.
Enter End Time: Input the ending hour and minute. If earlier than start time, it assumes the next day.
View Results: The calculator shows total hours, total minutes, and decimal hours for easy conversion to payroll systems.

For overnight shifts, just enter the times as normal—the calculator will automatically account for the midnight crossing.

What Is Hours?

An hours calculator determines the total duration between two times, displaying the result in multiple formats: hours and minutes, total minutes, and decimal hours. It automatically handles overnight shifts and spans across midnight.

This tool is essential for time tracking, payroll, project management, billing, and scheduling. Decimal hours are particularly useful for payroll systems and invoicing software.

Formula & Methodology

The hours calculation uses these formulas:

Convert to Minutes: (Hour × 60) + Minute
Total Duration: End Minutes − Start Minutes (add 1,440 minutes if end is before start)
Hours & Minutes: Hours = Total Minutes ÷ 60 (whole number), Minutes = Total Minutes mod 60
Decimal Hours: Total Minutes ÷ 60

The calculator handles overnight shifts by detecting when end time is before start time and adding 24 hours automatically.

Practical Examples

Example 1 (Regular Shift): Work from 9:00 AM to 5:30 PM = 8 hours 30 minutes = 8.5 decimal hours.

Example 2 (Overnight Shift): Work from 11:00 PM to 2:00 AM = 3 hours. The calculator automatically treats 2 AM as the next day.

Example 3 (For Payroll): 8 hours 15 minutes = 8.25 decimal hours. At $20/hour: 8.25 × $20 = $165 gross pay before deductions.

Frequently Asked Questions

Related Calculators

Date Calculator - Days Between Two Dates

Calculate the number of days, weeks, months, and years between two dates. Find business days, remaining days, and more with this free date calculator.

Age Calculator

Calculate your exact age in years, months, and days from your date of birth. See total days and weeks lived, and compute age on any target date.

Salary Calculator

Convert your annual salary to hourly, weekly, biweekly, and monthly pay. Estimate take-home pay after federal and state taxes with adjustable tax rates.

Tip Calculator

Quickly calculate tip amounts, total bills, and per-person splits. Adjust the tip percentage with a slider and divide the bill among any number of people.