Why Pay Period Conversions Confuse People
A job offer of "$30 an hour" and a salary of "$62,400 a year" can describe the same compensation — or wildly different ones, depending on how many hours and weeks are actually worked. The gap between an hourly rate and an annual salary is not a single fixed multiplier; it depends on your schedule. This is why job seekers, contractors, and HR teams repeatedly need a reliable way to convert between periods.
The core relationship is simple: annual = hourly × hours per week × weeks per year. Everything else — monthly, weekly, bi-weekly — is just the annual figure sliced into different numbers of pay periods. Getting the conversion right means being explicit about the schedule, which most quick mental estimates skip.
The Standard Conversions
Hourly to annual: Multiply your hourly rate by hours per week, then by weeks per year. At the common US default of 40 hours and 52 weeks, $30/hour = 30 × 40 × 52 = $62,400 per year.
Annual to hourly: Divide annual pay by (hours per week × weeks per year). A $62,400 salary at 40/52 works out to exactly $30/hour. The same salary at 35 hours a week is $34.29/hour — the schedule changes the answer.
Annual to monthly: Divide by 12. Note that a "month" of pay is not four weeks; it is the annual figure divided into twelve equal parts, which is about 4.33 weeks.
Annual to bi-weekly: Divide by 26 (there are 26 two-week periods in a year). This is different from twice the monthly figure — a frequent source of payroll confusion. Some years contain 27 bi-weekly pay dates, which is why bi-weekly employees occasionally see a "third paycheck" month.
Annual to semi-monthly: Divide by 24 (twice a month, on fixed dates). Semi-monthly and bi-weekly are not the same: 24 versus 26 pay periods produces different per-check amounts for the same salary.
Hours, Weeks, and the Schedule Trap
Full-time in the United States is conventionally 40 hours per week across 52 weeks, but many real schedules differ. A salaried worker who takes two unpaid weeks effectively works 50 weeks. A part-time role at 25 hours per week dramatically lowers the annual equivalent of a given hourly rate. Teachers, seasonal staff, and freelancers frequently work far fewer than 52 paid weeks. Any honest conversion must let you set these values rather than baking in 40/52.
The "work days per year" figure (weeks × days per week) is useful for daily-rate contractors. At 52 weeks and 5 days, that is 260 working days; subtract holidays and vacation to get your real billable days.
Overtime and the 1.5× Rule
Under the US Fair Labor Standards Act, non-exempt employees must be paid at least 1.5× their regular rate for hours worked beyond 40 in a workweek. If you earn $20/hour and work 50 hours, the first 40 hours pay $800 and the 10 overtime hours pay 10 × $20 × 1.5 = $300, for a total of $1,100 that week. Overtime is calculated weekly, not by pay period — averaging hours across two weeks of a bi-weekly period to avoid overtime is not permitted for covered employees. Exempt salaried roles and rules outside the US differ, so always check your jurisdiction.
Gross Pay vs. Take-Home Pay
Every figure above is gross pay — what you earn before deductions. Your actual take-home is lower. In the US, the employee FICA share is 6.2% for Social Security (up to an annual wage cap) plus 1.45% for Medicare, totalling 7.65%. On a $62,400 salary that is roughly $4,774 a year before any income tax. Federal income tax, state tax, health premiums, and retirement contributions reduce take-home further. This tool's optional FICA estimate covers only that 7.65% payroll-tax slice; it is not a full paycheck calculator, and it does not model income-tax brackets or the Social Security wage cap.
Using Conversions When Comparing Offers
When you compare a contract hourly role against a salaried one, convert both to the same period and the same schedule before deciding. A $45/hour contract sounds better than a $80,000 salary, but at 40/52 the contract is $93,600 gross — yet contractors usually pay both halves of FICA (15.3% self-employment tax) and receive no paid leave or benefits. Convert to a like-for-like annual figure, then adjust for benefits and self-employment tax to compare honestly.
When Not to Use This Calculator
This tool converts between pay periods and estimates only the US federal FICA payroll-tax slice — it does not calculate federal or state income tax, pre-tax deductions like 401(k) contributions or health insurance premiums, or the Social Security wage base that stops the 6.2% share once your income crosses the annual threshold. If you need an actual take-home paycheck estimate, use this tool for the period conversion and overtime math, then run the gross figure through a full payroll or tax calculator for withholding — this tool is not tax or financial advice. Workers outside the United States can use the period-conversion and overtime math freely, but should ignore the FICA toggle and confirm their own country's overtime rules, since the 1.5× threshold and the FICA rate are both US-specific defaults.
Three Worked Walkthroughs
- Maria's offer comparison: Maria has a $58,000 salary offer and a competing $28/hour contract role at the same 40 hours a week. She enters $28 hourly and gets $58,240 a year — almost identical gross pay — but remembers the contract role means paying the full 15.3% self-employment tax and no employer benefits, so she treats the calculator's numbers as a starting point for a deeper comparison rather than the final word.
- Elena's 39-week teaching contract: Elena is paid an annual salary but only works 39 weeks a year. Entering her annual figure with weeks-per-year set to 39 instead of 52 gives her the real effective weekly and daily rate she is actually paid across the school year, rather than a number that assumes she works all 52 weeks.
- Diego's overtime week: Diego earns $22/hour and worked 46 hours this week. The overtime panel shows 40 hours of regular pay ($880) plus 6 hours at 1.5× ($198), for $1,078 total — a number he can check against his actual paycheck before raising a payroll discrepancy.
Salary Calculator vs. a Spreadsheet or a Generic Pay Converter
| Factor | This calculator | Spreadsheet | Generic search-result converter |
|---|
| All seven periods stay consistent | Yes, derived from one annual base | Only if every formula references the same cell | Often handles two periods only |
| Adjustable real schedule (hours/weeks/days) | Yes | Requires building it yourself | Usually assumes 40/52 |
| Clearly labeled tax scope | Yes — FICA only, explicitly stated | Depends on what you build | Often vague about what's included |
| Data leaves your device | Never | Never (local file) | Often, for ads or lead capture |
From Paycheck to Plan: Chaining This Tool With Others
A pay-period conversion is often just the first step in a bigger plan. Once you know your monthly or weekly figure, the savings goal calculator shows how a set portion of that pay builds toward a specific target, and the compound interest calculator projects what consistently investing part of each paycheck could grow into over the years — the same annual figure this tool produces feeds directly into both.
