Work Hours Calculator: Weekly Hours, Breaks and Overtime

How to use this work hours calculator

Adding up a week by hand is arithmetic in base sixty, done tired, at the end of a shift. Seven start times, seven end times, a break to subtract from each, and a total that has to come out in decimal because payroll does not accept 37:45.

This work hours calculator does that in the browser. Enter what time each day started and finished, put the unpaid break in minutes beside it, and the week totals itself as you type. Every day shows its own total in hours and minutes and again in decimal, so a timesheet can be copied straight across.

Two options change the result rather than decorating it. The overtime threshold splits the week into regular and overtime hours, and an hourly rate turns those hours into pay at whatever multiplier your rules use. Leave both alone and the calculator simply counts hours worked.

How to calculate work hours by hand

The manual method is worth knowing, because it is what the calculator is checking. Four steps, in order.

1. Convert both times to the 24-hour clock. An end time of 5 PM becomes 17:00, which removes the AM and PM arithmetic entirely.
2. Subtract the start from the end. Where the finish is earlier than the start, the shift crossed midnight: add 24 hours before subtracting.
3. Subtract the unpaid break in minutes. A 30-minute lunch on an 8-hour span leaves 7 hours 30.
4. Add the days together, then convert the total to decimal by dividing the minutes by 60.

The error that recurs is in the last step. Thirty-seven hours and forty-five minutes is 37.75 decimal hours, not 37.45. Reading minutes as hundredths overstates or understates every timesheet it touches, and it does so quietly.

Hours and minutes to decimal hours

Payroll systems take decimal hours. Clocks produce minutes. The conversion is a division by sixty, and these are the values that come up most often.

The calculator prints both forms for every day and for the week, so nothing has to be converted twice.

Breaks, and which of them count

A break is either paid or it is not, and the distinction decides whether it belongs in the total.

Unpaid meal breaks come out of the day. Short rest breaks are usually paid and stay in. Time spent waiting on site, on call at the workplace, or finishing after a clock-out is working time in most jurisdictions even when nobody recorded it, and it is the most common source of a disputed timesheet.

Enter only the unpaid minutes in the break column. Anything paid is already inside the span between start and end.

Overtime, and where the line sits

Overtime is not a property of a shift. It is a property of a week that has already passed a threshold, which is why it is invisible until the hours are added up.

In the United States the federal threshold is 40 hours in a workweek and the rate is one and a half times regular pay. Several states add a daily rule on top, so hours past eight in a single day count as overtime whatever the weekly total. Elsewhere the threshold and the multiplier are set by law, by contract or by an agreement, which is why both are editable here rather than fixed.

Set the threshold to match your rules and the calculator splits the week into regular and overtime hours. Add a rate and it prices both.

Rounding, and why it is worth being careful

Rounding clock times to the nearest quarter hour is a common practice and a lawful one where it does not consistently favour the employer. Rounding that always lands the employer's way stops being a convention and becomes a shortfall.

This calculator does not round. It works in whole minutes and shows the result to two decimal places, so any rounding your policy applies is applied deliberately rather than inherited from a tool.

Who this calculator is for

Hourly employees checking a pay stub against what they actually worked, which is the most common reason anyone opens a work hours calculator at all.

Managers approving timesheets, where the useful question is whether a week crossed the overtime threshold and by how much. Small business owners running payroll themselves, for whom the calculator is the payroll system. And contractors and freelancers converting time worked into an invoice line.

All four are doing the same arithmetic. The difference is what happens to the answer afterwards.

Where weekly totals usually go wrong

Five errors account for most of the difference between a timesheet and a pay run.

• Minutes read as decimals: 7 hours 30 entered as 7.30 rather than 7.50.
• Overnight shifts subtracted the wrong way round, producing a negative day that quietly becomes zero.
• Paid rest breaks deducted twice, once by the clock and once by hand.
• The workweek starting on a different day from the one the overtime rule uses.
• Unrecorded work before a clock-in or after a clock-out, which never reaches the total at all.

The first four are arithmetic and a calculator removes them. The fifth is a recording problem, and it is the one that costs the most, because nothing in a spreadsheet can recover an hour nobody wrote down.

Weekly, biweekly and monthly totals

The week is the unit that matters for overtime, and it is rarely the unit that matters for pay. Most pay runs are longer, and the two do not divide evenly.

A biweekly period is two workweeks and the overtime test is applied to each of them separately. Forty-five hours in the first week and thirty-five in the second is not eighty regular hours; it is five hours of overtime and seventy-five regular, and averaging the two weeks together is the error that produces an underpayment.

Semi-monthly and monthly runs are worse, because the period boundary falls mid-week. The workweek still governs overtime, so the calculation splits at the week rather than at the pay date. Run this weekly hours calculator once per workweek and add the results; do not total the month and divide.

For a rough annual figure, a full-time week of 40 hours over 52 weeks is 2,080 hours before holidays and leave. The work days in a year calculator gives the accurate figure for a given country and year.

Part-time, split shifts and weeks that are not the same twice

A fixed five-day week is the easy case and increasingly the rare one. Part-time staff work four days one week and two the next, split shifts put a gap in the middle of a day, and rotating patterns move people through days and nights on a cycle longer than a week.

Split shifts are the case people get wrong here. A day that runs 07:00 to 11:00 and again 17:00 to 21:00 is eight hours worked, not fourteen. Enter it as the longer span with the gap as an unpaid break, or add the two blocks on separate rows if the tool you are using allows it; either way the number to record is the time worked, not the time elapsed between first arrival and last departure.

Overnight shifts are the other one. A shift from 22:00 to 06:00 crosses midnight, and subtracting one from the other gives a negative number. This calculator adds the twenty-four hours automatically, which is why a night shift entered plainly comes out as eight hours rather than as an error.

Time card, timesheet and what each one is for

The words are used interchangeably and describe different documents. A time card records clock-ins and clock-outs for one person over one period: raw times, in the order they happened. A timesheet is the processed version, with hours totalled, breaks deducted and the result expressed in the form payroll accepts.

This page produces the second from the first. What it does not produce is proof: a calculated total is only as good as the times entered into it, which is the difference between a work hours calculator and a time clock. One does arithmetic on what you remember; the other records what happened.

For a single week that distinction rarely matters. Across a team it is the whole question, because remembered times are systematically wrong in the direction of the person remembering them.

What counts as a standard week

Forty hours is the American full-time week and the reference point for federal overtime. It is not universal.

Much of Europe works a 35 to 40 hour week with the maximum, including overtime, capped by law at an average of 48 across a reference period. Australia sets 38 ordinary hours. Several countries set a lower daily maximum than the weekly figure implies, which is why a week that looks compliant in total can still breach a daily rule.

The threshold field exists for exactly this. Set it to the number your rules use and the split between regular and overtime hours follows your jurisdiction rather than an assumption baked into a calculator.

The same tool, asked for in a dozen ways

People arrive here having typed very different things, and almost all of them describe one calculation.

An hour calculator, a work hour calculator and a work time calculator are the same request in different word order. So are hours worked calculator and calculator hours worked, or hours calculator for work, hour calculator for work and calculator for work hours. A weekly hours calculator and a weekly hour calculator both mean the seven-day total; hours calculator week and hours calculator work are the same query with the last word dropped.

Some phrasings name the answer instead of the tool. Calculate hours worked, calculate work hours and calculate my work hours are instructions rather than nouns, and a total hours calculator is what people call it once they only want the sum. An employee hours calculator is the manager-side version of the same page, applied to somebody else's week rather than their own.

A few name a shift length: an 8 hour calculator is usually someone checking whether a day with a break still comes to eight, and a time hours calculator is the general form of the same question. Others arrive by the name of a site they used before, which is why calculator soup work hours is a common search that describes a habit rather than a preference.

All of them need four things: the start, the end, the unpaid break and the total in both formats. That is what this page does, and it is why the field names here are plain rather than clever.

When a calculator stops being enough

For one person and one week, this page is the whole job. The point at which it stops working is not complexity but repetition: forty people, every week, with the totals having to survive the trip into payroll.

At that point the hours have to be recorded where they happen rather than reconstructed afterwards. Shifton records them against the shift itself: staff clock in from the mobile app, the hours attach to the shift that produced them, and the week arrives as a timesheet rather than as seven remembered start times. The time tracking feature covers how the clock works, and payroll management covers what happens to the hours afterwards.

Two other calculators here answer neighbouring questions. The overtime calculator prices overtime on its own, and the military time converter handles the 12 to 24-hour conversion this page assumes you have already done.