Tools/Datetime Tools/Work Hours Calculator

Work Hours Calculator – Hours Between Two Times

Calculate total work hours and overtime online free - no login. Enter your start and end times for each day, add breaks, and instantly see total hours worked and overtime pay.

About this tool

Manually calculating hours between non-round times - like 9:37am to 5:22pm minus a 45-minute break - introduces errors. This calculates precisely in both hours:minutes and decimal format suitable for invoicing.

Enter start time and end time, subtract break duration, and calculate total hours worked. Useful for timesheets, client billing, and payroll calculations.

How to use Work Hours Calculator

  1. Step 1: Enter Times. Add start time, end time, and break duration for each day.
  2. Step 2: Add More Days. Add as many workdays as needed to your timesheet.
  3. Step 3: Calculate. See total regular hours and overtime hours.
  4. Step 4: Calculate Pay. Enter your hourly rate to see total and overtime pay.

Where this tool helps

Calculate hours worked for a freelance invoice, fill in a timesheet accurately, calculate overtime hours beyond a standard 8-hour day, verify hours worked for payroll processing, calculate total hours across a weekly work schedule, and determine partial day hours for leave calculations.

  • Calculates hours between any two times with optional break deduction.
  • Supports overnight shifts - handles end time earlier than start time correctly.
  • Decimal hours output for easy multiplication with hourly rates.

The most common question is how to convert hours:minutes to decimal for invoicing. 30 minutes = 0.5 hours, 15 minutes = 0.25, 45 minutes = 0.75. This calculator outputs both formats - use the decimal version when multiplying by an hourly rate.

How to Use Work Hours Calculator Converter

Enter Times

Add start time, end time, and break duration for each day.

Add More Days

Add as many workdays as needed to your timesheet.

Calculate

See total regular hours and overtime hours.

Calculate Pay

Enter your hourly rate to see total and overtime pay.

FAQs

Common questions about this tool and how to use it.

How do I calculate hours worked between two times?

Subtract the start time from the end time in minutes, then convert to hours. Example: 9:15am to 5:45pm. Convert to minutes: (17×60+45) - (9×60+15) = 1065 - 555 = 510 minutes. 510 ÷ 60 = 8.5 hours. For a 30-minute break: 8.5 - 0.5 = 8.0 hours. In decimal: 8.0 hours × hourly rate = daily pay. This calculator handles the subtraction and break deduction automatically.

How do I calculate overtime hours?

Standard overtime in the US: hours beyond 8 per day or 40 per week are overtime at 1.5x rate. Example: 10 hours worked. Regular hours = 8. Overtime hours = 2. Weekly overtime: total hours - 40. Some calculations use daily overtime (California), weekly overtime, or both. Enter your total hours worked and standard hours threshold to calculate the split between regular and overtime hours.

How do I calculate total hours for a weekly timesheet?

Calculate each day's hours separately (end time - start time - breaks), then sum all days. Example: Mon 8h, Tue 7.5h, Wed 9h, Thu 8h, Fri 6h = 38.5 total hours. For payroll: multiply regular hours (up to 40) by regular rate and overtime hours (above 40) by overtime rate. Track decimal hours (not hours:minutes) for multiplication - 7.5 hours not 7:30.

How do I convert hours and minutes to decimal for invoicing?

Divide minutes by 60 to get the decimal portion. Common conversions: 15 min = 0.25h. 30 min = 0.50h. 45 min = 0.75h. 10 min = 0.167h. 20 min = 0.333h. Example: 3 hours 45 minutes = 3 + (45/60) = 3.75 hours. Invoice: 3.75 hours × $75/hour = $281.25. Always use decimal hours for multiplication - never multiply hours:minutes directly by a rate.

How do I calculate part-time weekly hours from a daily schedule?

Multiply daily hours by the number of days worked per week. Example: working 6 hours per day, 4 days per week = 24 hours per week. For variable schedules, sum each day's hours. Annual hours: weekly hours × 52. Monthly hours: weekly hours × 52 ÷ 12 = weekly hours × 4.333. Full-time equivalent (FTE): part-time hours ÷ 40 hours = FTE. Example: 24 hours ÷ 40 = 0.6 FTE.

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