All Calculators

Every calculator on TimeCalcLab, grouped by category. 16 live, 0 in progress.

Work & Hours

Calculators for work hours, time cards, timesheets, shifts, overtime and unpaid breaks — built for weekly and biweekly payroll math.

• Work Hours Calculator

  Calculate hours worked between start and finish times, subtract unpaid breaks and total multiple shifts — with overnight support and decimal hours.

• Time Card Calculator

  Weekly Monday–Sunday time card with clock-in/out, unpaid breaks, overnight shifts, regular vs overtime hours and estimated pay.

• Timesheet Calculator

  Enter hours worked each day to total weekly or biweekly timesheets in hours, minutes and decimal hours, with optional per-week overtime.

• Shift Calculator

  Calculate hours worked for one or more shifts from shift start and end times, with unpaid breaks, overnight support, decimal hours and optional shift pay.

• Overtime Calculator

  Calculate regular hours, overtime hours and estimated overtime pay from your total hours, hourly rate and overtime multiplier.

• Lunch Break Calculator

  Calculate lunch break duration, your return-to-work time, or actual hours worked after an unpaid lunch — with overnight and AM/PM support.

Time

Work out how long something took, add or subtract time, and convert clock time into usable totals.

• Time Duration Calculator

  Calculate the hours and minutes between two times, including overnight spans, total minutes and decimal hours — plus add or subtract time from a starting time.

• Hours Calculator

  Add, subtract and total hours and minutes. Enter durations as hours + minutes or H:MM values, with automatic minute carrying and decimal hours.

• Add Time Calculator

  Add or subtract hours and minutes from any starting time and instantly find the resulting clock time, with overnight wrapping, multi-day durations and clear day-change labels.

Dates

Count days between dates, skip weekends and holidays, and add or subtract days from any date.

• Days Between Dates Calculator

  Count the number of days, weeks and calendar time between two dates, with an optional include-end-date count, hours and minutes, and a calendar difference of years, months and days.

• Business Days Calculator

  Count working days between two dates, excluding weekends and your own holiday dates, or add and subtract business days to find a future or previous working date.

• Date Add & Subtract Calculator

  Add or subtract days, weeks, months or years from any starting date to find the resulting calendar date, with true calendar arithmetic and month-end clamping.

• Age Calculator

  Calculate exact age in years, months and days from a date of birth or any start date, with total months, weeks and days and true calendar arithmetic.

Conversions

Convert between hours, minutes, seconds and decimal hours with results you can paste straight into payroll.

• Decimal Hours Calculator

  Convert hours and minutes to decimal hours, or convert decimal hours back to hours and minutes — with a quick reference table for common payroll conversions.

• Time Conversion Calculator

  Convert between seconds, minutes, hours and days with a single value and unit selector — instant results with equivalent values in all four units.

• Minutes to Hours Calculator

  Convert any minute total into hours and minutes or decimal hours — instant results with a quick reference table for common payroll conversions.

Guides

Background reading on hour math and payroll rounding: TimeCalcLab guides.