Free hours & time calculators
HoursWise is a free toolkit from Crushjs for checking everyday time arithmetic. Each calculator includes formulas, a worked example, limitations and a step-by-step breakdown. It does not record attendance, submit payroll or apply legal overtime rules.
Assumptions and limits
Clock calculations use wall-clock minutes, without time zones or daylight-saving adjustments. An earlier end time means next day in automatic mode. Equal start and end times mean zero, unless Next day is selected.
The threshold is a planning input, not a determination of legal overtime or payroll rules.