calculate hour rate from annual salary
1 You may calculate biweekly gross by dividing annual salary by the number of days the salary is based on for the year and multiplying the result by 14 days. 2  For example, $52,000/365 days = $142.47 x 14 = $2,000. 3  Gross represents your entire salary before deductions.alculate biweekly gross by dividing annual salary by the number of pay periods in the year. A biweekly payroll usually has 26 annual pay periods. For example, if the annual salary is $52,000, the biweekly gross is $2,000. Step 2. Divide biweekly gross by the number of days in the pay period to arrive at daily rate.