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How to Use the Work Hours Calculator — WebdevToolbox Guide

Calculate total hours worked from clock-in/clock-out times across multiple days, with unpaid breaks deducted and a decimal-hours total for payroll.

WebdevToolbox Team1 min read

Payroll systems almost always want decimal hours (7.5, not “7h 30m”), but timesheets are naturally recorded in clock times — this calculator bridges that gap, handling multi-day entries, unpaid breaks, and even overnight shifts automatically.

What Is the Work Hours Calculator?

A timesheet tool that takes clock-in and clock-out times for any number of days, subtracts an optional unpaid break per day, and totals everything into both a readable hours-and-minutes format and a decimal-hours figure ready for payroll.

How to Use It

  1. Open the tool at /tools/work-hours-calculator.
  2. Enter clock-in and clock-out times for each day, plus any unpaid break minutes.
  3. Use “Add day” for more entries, or “Remove” to delete a row.
  4. Read the running total in both hours/minutes and decimal form.

Key Features

  • Overnight shift support, automatically treating a clock-out earlier than clock-in as happening the next day.
  • Per-day unpaid break deduction, matching how most payroll systems handle lunch breaks.
  • Decimal hours conversion, giving the exact format most timesheet and payroll software expects.
  • Unlimited day entries, add or remove rows as needed for any pay period length.

When to Use This Tool

  • Freelancers and contractors tallying billable hours across a work week.
  • Hourly employees double-checking a paycheck against their own clock-in/out records.
  • Small business owners manually calculating payroll without dedicated timesheet software.

Try It Now

Open Work Hours Calculator directly, or press ⌘K and type the tool name from anywhere on the site.


Part of the Math & Numbers collection on WebdevToolbox — free, browser-based developer tools with no login required.

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