The NumberTrove library

Work & pay
calculators.

Check pay, hours, overtime, and working days without a spreadsheet.

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Most people start with these

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All tools

6 work & pay calculators

Free · no account · formula shown
How to choose the right work & pay calculator

Work and pay calculations often look simple until hours, unpaid breaks, overtime, holidays, or pay periods change the answer. NumberTrove’s work calculators help convert hourly wages to annual salary, convert salary back to an hourly rate, estimate overtime pay, count working days, and total work hours. Use them when comparing job offers, checking a payslip, setting a freelance rate, or planning the time in a schedule.

Use hourly-to-salary or salary-to-hourly when the main question is the relationship between pay and hours. Choose overtime when a multiplier or extra-hours rate matters, and work-hours when start times, end times, or breaks are the focus. Working-days is for date ranges and weekday counts. Adjust the assumptions to match paid weeks, weekly hours, unpaid leave, and local rules; gross pay is not the same as take-home pay after taxes and benefits. For a job comparison, calculate both offers using the same paid-hours and time-off assumptions before comparing the annual totals.

Adjust paid weeks, hours per week, overtime rates, holidays, and unpaid time to match the situation. Payroll taxes, benefits, and local labor rules are not automatically included unless stated.

Every tool is free, browser-based, and shows its formula, assumptions, and related calculators. Start with the closest match, then adjust the inputs to fit your situation.