Quirkulator

Working Time Calculators

10 calculators covering business days, working hours and timesheets, each with its formula and worked examples.

Working Time Calculators brings together 10 calculators for business days, working hours and timesheets, including Annual Leave Accrual, Break Adjusted Hours, Notice Period End Date and Shift Length Calculator.

Each calculation gets its own page, with its own inputs, its own worked examples and its own explanation of what the answer means. The formula is printed on the page rather than hidden in the code, so a result you disagree with can be argued with rather than merely distrusted.

All 10 pages compute in your browser: nothing you type is sent anywhere, and results update as you edit. Each one carries worked examples, interpretation bands where a score needs context, and a FAQ answering what people actually ask about that calculation.

The collection is part of Date & Time, and every page links to the neighbouring calculations you usually need next.

10 pages in this collection

Annual Leave AccrualWork out how much annual leave has built up part way through a holiday year.Billable Hours CalculatorWork out billable hours, utilisation and fee income from a week of logged time.Break Adjusted HoursTake unpaid breaks out of a shift to find the hours that actually get paid.Business Days CalculatorCount the working days between two dates, with weekends and holidays taken out.Notice Period End DateFind the last working day of a notice period given in days, weeks or months.Project Deadline CalculatorConvert an effort estimate in working days into a realistic delivery date.Shift Length CalculatorMeasure a single shift including night spans, and check the rest gap before the next one.Sprint Days CalculatorTurn a sprint length and team size into the person-days actually available for delivery.Timesheet Total CalculatorAdd up a week of clock-in and clock-out times and split regular hours from overtime.Working Hours CalculatorConvert a date range into contracted working hours at your own daily pattern.

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