All Calculators
Browse all 17 WorkHoursGuide calculators for work hours, time cards, payroll, time conversion, PTO planning, business days, and billable work. Use the search or category filters to jump directly to the tool you need.
Find the right work-time calculator
Each tool is designed for a different job, so you can calculate exactly what you need without forcing one oversized calculator to do everything.
Work Hours & Shifts
Calculate shifts, leave times, breaks, overnight work, and elapsed time.
Work Hours Calculator
Calculate hours worked from start and end times, subtract unpaid breaks, handle overnight shifts, and optionally estimate pay.
Weekly Hours Calculator
Add daily hours for the week, compare against a target, see overtime, decimal hours, averages, and optional gross pay.
Clock Out Calculator
Find exactly when you can leave based on your start time, required paid hours, unpaid breaks, or hours already worked.
Lunch Break Calculator
Find your return-to-work time from a break start and length, or calculate the exact duration of a lunch break.
Overnight Shift Calculator
Calculate a shift that crosses midnight, including breaks, before/after-midnight hours, decimal hours, and optional night premium.
Time Duration Calculator
Measure exact elapsed time between two clock times or two date-and-time values, including seconds and multi-day spans.
Military Time Converter
Convert regular 12-hour time to four-digit military time and back, including noon, midnight, 0000, and 2400.
Time Cards & Timesheets
Weekly punches, biweekly pay periods, project hours, and timesheet reporting.
Time Card Calculator
Build a complete weekly time card with punches, breaks, overnight shifts, overtime, estimated pay, and CSV export.
Biweekly Time Card Calculator
Calculate a 14-day pay period while keeping Week 1 and Week 2 overtime separate, with optional pay and CSV export.
Timesheet Calculator
Track already-known hours by date, project, client, and task with regular/OT hours, billable status, rates, and project summaries.
Pay & Earnings
Estimate hourly earnings, overtime pay, and salary equivalents.
Overtime Pay Calculator
Calculate overtime from total hours or separate regular/OT hours, including premium-only earnings and optional double time.
Hourly Pay Calculator
Estimate gross earnings from regular, overtime, and premium hours, plus optional bonuses, tips, and effective hourly rate.
Salary to Hourly Calculator
Convert annual salary into hourly, daily, weekly, biweekly, and monthly equivalents with customizable work hours and weeks.
Time Conversion
Convert decimal hours, clock formats, minutes, and seconds.
PTO & Work Planning
Project paid time off and count customizable working days.
Freelance & Professional
Measure billable work, utilization, project revenue, and capacity.
Which calculator should I use?
Start with the question you are trying to answer. If you know a start and end time and want hours worked, use the Work Hours Calculator. If you know your start time and need to find when you can leave, use Clock Out Calculator. If you need a full week of punches, use Time Card Calculator.
Work-time tools vs. payroll tools
Time calculators measure duration, shifts, and schedules. Pay calculators apply rates and multipliers to hours you provide. The pay results on WorkHoursGuide are gross estimates and do not calculate taxes, deductions, or determine which employment rules apply.
Time cards vs. timesheets
A time card is built from clock-in and clock-out punches. A timesheet can instead organize hours you already know by project, client, or task. That is why WorkHoursGuide provides separate tools for those workflows rather than combining them into one page.
Frequently asked questions
Are all WorkHoursGuide calculators free?
Yes. The calculators on this directory are designed to be used without creating an account.
Which calculator should I use to find my total weekly hours?
If you already know each day's hours, use Weekly Hours Calculator. If you have clock-in and clock-out punches for each day, use Time Card Calculator.
Which calculator should I use for an overnight shift?
Use Overnight Shift Calculator when the main issue is a shift crossing midnight. Work Hours Calculator and the time-card tools also support overnight entries.
Which tool converts minutes to decimal hours?
Use Decimal Hours Converter. It converts both directions and supports hours, minutes, and seconds.
Do the pay calculators determine legal overtime or PTO rules?
No. They calculate from the rates, thresholds, accrual rules, and other values you enter. Employment rules vary by employer and jurisdiction.