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Compare and sum costs for ChatGPT, Claude, Gemini, xAI Grok and developer AI tools.
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Work & pay calculators
Hourly rate, 2026 Polish contracts (UoP, mandate, JDG), overtime, annual leave, sick pay (L4), per diem and PPK.
Hourly & daily invoice
Calculate net, VAT and gross invoice totals from daily hours, hourly rate and billable days.
Open calculatorHourly ↔ annual pay
Convert an annual salary into an hourly rate (or an hourly rate into annual pay) from weekly hours and working weeks.
Open calculatorEffective hourly pay (incl. commute)
Divide your annual take-home pay by your combined work and commuting hours to see what your time actually earns.
Open calculatorHours in a work year
Calculate actual days and hours worked in a year (after subtracting holidays, leave and sick days) and your implied hourly pay.
Open calculatorRaise vs inflation
Compare a nominal salary raise against inflation to see your real purchasing-power change and the pay needed just to break even.
Open calculatorHours & work time
Calculate hours and minutes between two clock times minus a break, or add minutes to a starting time.
Open calculatorPolish workdays
Count working days between two dates (excluding weekends and Polish public holidays) or add working days to a start date.
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