What is a weekly net pay calculator?

A weekly net pay calculator is a calculator tool that allows a person to input details about their gross pay, withholding information, deductions and taxes to calculate his net pay. Net pay is often referred to as the money a person takes home, says ADP.

A net pay calculator allows a person to input his state, local and federal tax rates, gross wages, W-4 filing status, tax filing allowances, tax exemptions and any voluntary deductions information to compute net pay. These calculators give people a rough estimate of their pay checks for planning purposes and are not designed to calculate exact deduction amounts, says Bankrate.