Semi-Monthly Pay Calculator

Written by Great Medico

Updated September 25, 2026 •2 min read

Share Print Save

Semi-monthly pay sounds similar to biweekly pay, but the schedule is different: semi-monthly means 24 pay periods per year. The Semi-Monthly Pay Calculator converts an hourly, daily, weekly, monthly, or yearly wage into an estimated amount for each of those 24 pay periods, making it easier to compare offers or plan a recurring budget.

What this calculator does

The calculator accepts hourly wage, daily wage, weekly wage, monthly wage, or yearly wage, along with hours per week and days per week. It converts the pay amount you provide to an annual equivalent, then divides annual pay by 24 to estimate one semi-monthly period. It also shows yearly, monthly, and weekly equivalents.

How to use it

Enter the pay rate you already know and leave the alternative wage fields blank where possible. If you start from an hourly wage, enter hours per week. If you start from daily pay, enter days per week. The default assumptions are 40 hours and 5 workdays per week. Use a schedule that reflects your normal work pattern before relying on the conversion.

How the calculation works

Hourly pay is annualized as hourly wage × hours per week × 52. Daily pay is annualized as daily wage × days per week × 52. Weekly pay is multiplied by 52, monthly pay by 12, and yearly wage is already annual. Semi-monthly pay = annual wage ÷ 24.

Example

If you earn $25 per hour and work 40 hours per week, the annual equivalent is $52,000. Dividing by 24 gives about $2,166.67 per semi-monthly pay period. The same annual amount corresponds to about $4,333.33 per month and $1,000 per week. These figures assume the stated schedule continues across the year.

How to interpret the result

The semi-monthly result is a gross-pay equivalent, not a prediction of the exact deposit that will reach your bank account. Employers may prorate partial periods, use salary rules that are not simple hourly annualizations, or deduct taxes, insurance, retirement contributions, and other items from each check.

Limitations and notes

The calculator uses 52 weeks and exactly 24 semi-monthly periods per year. It does not model leap years, unpaid leave, variable hours, overtime, bonuses, commissions, or payroll deductions. Also remember that semi-monthly and biweekly are not interchangeable: biweekly schedules generally produce 26 pay periods in a standard year, while this tool specifically uses 24.