Why the hourly rate is the only comparable number
Two job offers, $62,000 and $58,000. The higher one looks better until you notice it comes with a 45-minute commute each way and a week that routinely runs to 47 hours. The lower one is a 37.5-hour week from a spare room. Per year, the first pays $4,000 more. Per hour of your life, it pays less.
That inversion is not an edge case. It is what happens every time you compare salaries without comparing denominators. An hourly rate is the only figure that already contains the denominator, which is why it is the number this whole site is built around.
The one formula that matters
Converting a salary to an hourly rate needs three inputs, and most calculators only ask for one:
hourly rate = salary ÷ (paid hours per day × paid days per week × 52)
The hard part is never the division. It is paid hours per day, because that is where contracts, breaks and habit quietly disagree with each other.
Paid hours per day is not shift length
A 09:00–17:30 shift looks like 8.5 hours on the contract. With a 30-minute unpaid lunch it is 8. With two unpaid 15-minute breaks as well, it is 7.5. Over a year, that last half hour is 130 hours — three and a bit working weeks handed over for nothing.
Working days per week changes the rate more than most raises
Dropping from five days to four at constant salary raises the hourly rate by 25%, because the same money now buys 20% fewer hours. Going from five to six days lowers it by about 17%. Neither move shows up in a salary conversation, and both show up immediately here.
| Schedule | Paid h / week | Divisor | Rate at $60,000 |
|---|---|---|---|
| 5 days · 8 h paid | 40.0 | 2,080 | $28.85 |
| 5 days · 7.5 h paid (37.5 h contract) | 37.5 | 1,950 | $30.77 |
| 5 days · 8.5 h paid | 42.5 | 2,210 | $27.15 |
| 4 days · 8 h paid | 32.0 | 1,664 | $36.06 |
| 6 days · 8 h paid | 48.0 | 2,496 | $24.04 |
Same $60,000, a spread from $24.04 to $36.06 an hour. The person on the six-day week earns a third less per hour than the person on four days, for identical annual pay. No salary-negotiation advice will ever surface that, because salary is the wrong unit.
Four places the rate goes wrong
- Using the contracted day instead of the paid day. The most common error by a wide margin. Lunch is usually unpaid; treat it as paid and every downstream number is optimistic.
- Ignoring unpaid overtime. Staying 45 minutes late three times a week adds 117 hours a year to the denominator without adding a cent to the numerator.
- Mixing gross pay with net hours. Or the reverse. Pick gross and stay there.
- Dividing a monthly salary by 173.3. That figure is 2,080 ÷ 12, so it inherits every assumption of the annual version — and adds a new one, that every month has the same number of working days. February disagrees.
What this topic covers
Three guides and two live tools, in the order most people need them. Start with the annual conversion, then look at where the divisor comes from, then handle the monthly case:
- Hourly rate from annual salary — the conversion itself, worked through on real schedules.
- 2,080 hours in a year — where the default divisor comes from, and who it actually fits.
- Monthly salary to hourly rate — why ÷ 173.3 is a trap, and what to divide by instead.
- Hourly rate calculator — put your own schedule in and get the number.
- Salary per second — the same rate, at the smallest unit, ticking live.
Once you have the number, the other two topics explain what happens to it: what counts as paid time decides the denominator, and when the money arrives decides how long you wait for it.