SalaryPayTools is a free set of 14 US pay calculators for workers, job seekers and anyone comparing offers. Convert an hourly wage to annual, monthly, biweekly and weekly pay (or a salary back to hourly), figure part-time and time-and-a-half overtime pay, see what a raise really adds, get a basic 2026 federal income tax estimate, and estimate 2026 take-home pay for Texas, Arkansas, Illinois and North Carolina. Every result shows the formula behind the number. Free, no sign-up, works on any phone.