Gross pay vs. net pay
Gross pay is the full amount earned before any deductions — income tax, payroll taxes, retirement contributions, or benefits premiums. Net pay (sometimes called take-home pay) is what's left after those deductions are subtracted.
A salary or hourly-rate calculator that converts between pay frequencies is generally working with gross figures, since gross pay is what's stated in an offer or contract; actual net pay depends on tax brackets, filing status, and benefit elections that vary by individual and location.
Converting between pay frequencies
The conversion method anchors every pay frequency to one common annual figure. For an hourly rate, annual pay = hourly rate × hours per day × days per week × 52 weeks. From that annual figure, other frequencies follow: monthly = annual ÷ 12, weekly = annual ÷ 52, biweekly = annual ÷ 26, and so on.
This is why hours-per-day and days-per-week matter as inputs even when you only want a monthly or annual figure — the calculator needs them to first establish the annual total before converting it into any other frequency.
Deriving an hourly rate from an annual salary
Going the other direction — from a known annual salary to an hourly rate — uses the same relationship solved for the missing variable: hourly rate = annual salary ÷ (hours per week × weeks worked per year).
The 'weeks worked per year' figure matters here: using 52 assumes no unpaid time off, while using a lower figure (say, 50, to account for two unpaid weeks) produces a higher implied hourly rate for the same annual salary, since the same pay is being spread across fewer working weeks.
How overtime pay is calculated
Overtime pay is calculated separately from regular pay and then added to it: overtime pay = overtime hours × regular hourly rate × overtime multiplier. A common multiplier is 1.5× ("time and a half"), though the exact rate and which hours qualify as overtime depend on local labor law and employment terms.
Total pay for the period is then regular pay plus overtime pay: (regular hours × hourly rate) + (overtime hours × hourly rate × multiplier). Because overtime hours are paid at a higher rate, the effective average hourly rate for the whole period — total pay divided by total hours — is higher than the base rate whenever any overtime is worked.
Frequently asked questions
Why is my calculated annual salary different from my actual paycheck total?
Salary and hourly-rate calculators generally compute gross pay. Your actual paycheck reflects net pay, after tax withholding and other deductions, which a simple pay-frequency conversion doesn't account for.
Does 'unpaid holidays and vacation' change my hourly rate?
It changes the adjusted annual pay you actually work for, not the stated hourly or annual rate itself — unpaid time off reduces the number of paid days in the year, which lowers total annual earnings even if the rate per hour worked stays the same.
Is overtime always paid at 1.5 times the regular rate?
Not always — 1.5× is a common convention (often called 'time and a half'), but some jurisdictions, employers, or specific circumstances (like holiday work) use different multipliers, including 2× ('double time').
Why does using fewer 'weeks worked per year' increase my calculated hourly rate?
Because the same annual salary is being divided across fewer working weeks, each week — and each hour within it — has to represent a larger share of the total annual pay, which raises the implied hourly figure.