Pay Period Converter
Convert any pay amount between weekly, biweekly, semi-monthly, monthly, and annual periods instantly. Useful when comparing job offers or reconciling payslips with annual compensation figures.
About this calculator
Different employers pay on different schedules, but all compensation ultimately annualizes to the same figure. The conversion works by first multiplying the given pay amount by the number of periods per year for the source frequency, then dividing by the number of periods for the target frequency. Common period counts: weekly = workWeeks (typically 52), biweekly = workWeeks / 2 (26), semi-monthly = 24, monthly = 12, annual = 1. Formula: convertedPay = payAmount × (sourcePeriodsPerYear) / (targetPeriodsPerYear). For example, a biweekly check of $2,000 annualizes to $2,000 × 26 = $52,000, then divides by 12 to give $4,333.33/month. Note that biweekly and semi-monthly are often confused — biweekly produces 26 paychecks per year while semi-monthly produces exactly 24.
How to use
You earn $1,500 biweekly (every two weeks, 26 pay periods/year) and want to know your monthly equivalent. Step 1 — annualize: $1,500 × 26 = $39,000/year. Step 2 — convert to monthly: $39,000 / 12 = $3,250/month. Alternatively, if you earn $3,250/month and want your weekly pay: $3,250 × 12 / 52 = $750/week. This approach works for any pair of pay periods as long as you use consistent annual multipliers.
Frequently asked questions
What is the difference between biweekly and semi-monthly pay periods?
Biweekly pay means you are paid every two weeks, resulting in 26 paychecks per year. Semi-monthly pay means you are paid twice a month on fixed dates (e.g., the 1st and 15th), resulting in exactly 24 paychecks per year. Because of this difference, biweekly gross pay per check is slightly lower than semi-monthly for the same annual salary. Two months per year, biweekly employees receive three paychecks instead of two, which can feel like a 'bonus' month for budgeting purposes.
How do I convert a biweekly salary to a monthly salary accurately?
Multiply your biweekly paycheck amount by 26 (the number of biweekly periods in a year) to get your annual salary. Then divide by 12 to get the monthly equivalent. For example, $2,308 biweekly × 26 = $60,008 annual ÷ 12 = $5,001/month. Avoid the tempting shortcut of simply multiplying biweekly pay by 2, which gives you a semi-monthly figure (24 periods) rather than a true monthly average and understates your annual income.
Why do work weeks per year matter when converting pay periods?
Most conversion tools assume exactly 52 work weeks per year, but some employers use 50 weeks to account for unpaid vacation, or define their fiscal year differently. Using the correct number of work weeks ensures your annualized figure matches your actual contract. For salaried employees it rarely makes a difference, but for hourly workers paid weekly, even a one-week discrepancy can shift the annual total by a full week's wages. Always confirm with your employer how many pay periods appear in your specific tax year.