Webhow to calculate hourly pay. Websmartasset's california paycheck calculator shows your hourly and salary income after federal, state and local taxes. Enter your info to see your take home pay. Webdouble check your calculations for hourly employees, or make sure your salaried employees get the right take home pay. We’ll show you the payroll taxes,. Use this tool to estimate the federal income tax you want your employer to withhold from your paycheck. This is tax withholding.