PAYHOURSLAB CALCULATORS
Work Hours & Overtime Calculators
Reconstruct your hours first, then estimate your pay. PayHoursLab calculators help you turn clock times into worked hours, compare time records and estimate overtime using your own numbers.
CHOOSE A TOOL
What do you need to calculate?
Each calculator solves a different part of the paycheck-checking process.
Time Card Calculator
Enter clock-in and clock-out times to calculate the total time worked across one or more shifts.
Work Hours Calculator
Calculate total working time and compare it with scheduled, recorded or payroll hours.
Overtime Calculator
Estimate overtime once you know the compensable hours and hourly rate that apply to the workweek.
Not sure which tool to use?
Start by checking the time record. Once the hours are correct, move to the pay and overtime calculation.
RECOMMENDED WORKFLOW
Use the calculators in this order
Payroll problems are easier to diagnose when you separate timekeeping from the wage calculation.
1
Reconstruct your punches
Enter the actual clock-in and clock-out times and calculate the total time between them.
2
Check total work hours
Compare the timecard total with your own records and consider breaks, training or other time that may count as work.
3
Check whether overtime applies
Separate the workweek correctly and determine whether total compensable hours exceed the applicable overtime threshold.
4
Calculate the overtime amount
Once the hours and rate are correct, estimate the overtime amount and compare it with payroll.
TIME FIRST
Why the hours come before the pay calculation
A calculator can only work with the information you enter. If the timecard itself is incomplete, the resulting pay calculation will also be incomplete.
For example, imagine that payroll shows 39 hours for the week, but you also completed 90 minutes of required training from home that never appeared on the timecard.
The first problem is not the overtime rate. It is the missing work time.
After adding that 1.5 hours, the reconstructed total becomes:
39 recorded hours + 1.5 additional work hours
= 40.5 hours worked
That change can affect both ordinary wages and the overtime analysis.
RELATED HUB
Not sure what counts as work?
Review breaks, training, on-call periods and timekeeping rules before relying on the calculator result.
CALCULATOR 01
Time Card Calculator
The Time Card Calculator is the best starting point when you have actual punch times and want to know how much time passed between clock-in and clock-out.
Use it for situations such as:
- multiple shifts in one day;
- different start and finish times each day;
- checking a handwritten timecard;
- comparing your punches with payroll totals;
- reconstructing a workweek from your own records.
Enter the start and finish times and calculate the total.
CALCULATOR 02
Work Hours Calculator
The Work Hours Calculator is useful when the question is not only when you punched in and out, but how much working time should be counted.
That distinction matters when breaks or other periods change the total.
Before using the result, check whether your workweek included:
- required training;
- work performed before clocking in;
- work performed after clocking out;
- short breaks;
- work during an unpaid meal period;
- on-call work;
- other time that may count as hours worked.
Our Work Hours hub explains those situations in more detail.
CALCULATOR 03
Overtime Calculator
Use the Overtime Calculator only after you have confirmed the hours that belong in the workweek.
For covered, nonexempt workers under the general federal rule, overtime is typically connected to hours worked above 40 in a workweek.
The calculation can become more complicated when the employee receives:
- different hourly rates;
- shift differential pay;
- certain bonuses;
- other compensation that affects the regular rate.
If your pay is more complicated than a single hourly rate, use the Overtime hub before relying on a simple calculation.
Estimate the overtime amount and compare it with your paycheck.
CALCULATORS + GUIDES
Use the tools with the guides
PayHoursLab calculators handle the arithmetic. The guides help determine which numbers belong in that arithmetic.
01
Work Hours
Determine which time should count before calculating totals.
02
Pay & Pay Rates
Understand base rates, shift differentials and other compensation.
03
Overtime
Understand the federal 40-hour rule and regular-rate calculations.
04
All Guides
Browse the full PayHoursLab guide library by topic.
FUTURE TOOLS
Calculators we can add as the site grows
New tools should solve a real calculation problem rather than exist simply to increase the page count.
Weighted Overtime Calculator
Calculate the regular rate when an employee works at multiple hourly rates during the same workweek.
Potential future tool
Shift Differential Calculator
Combine base-rate and differential hours and estimate the effect on total pay and overtime.
Potential future tool
Paycheck Hours Checker
Compare employee-recorded time with payroll hours and highlight differences that need review.
Potential future tool
Calculator FAQ
Which PayHoursLab calculator should I use first?
If you have clock-in and clock-out times, start with the Time Card Calculator. If you are checking what time should count as work, use the Work Hours Calculator and related guides before calculating pay.
Can a calculator tell me whether time legally counts as work?
No. A calculator performs arithmetic using the information entered. Whether training, breaks, on-call time or other periods count as work depends on the applicable rules and facts.
Should I use the overtime calculator before checking my timecard?
Usually no. Verify the compensable hours first, because missing work time can change whether the workweek crosses an overtime threshold.
Can multiple pay rates affect an overtime calculation?
Yes. Multiple rates, shift differentials and other compensation can affect the regular rate used for federal overtime.