About ClockSlate
Practical work-time tools, built to stay simple
ClockSlate helps workers, managers, bookkeepers and small businesses answer common time questions without installing software or creating an account.
What we optimize for
Every calculator is designed around speed, clarity and transparent arithmetic. Indexable explanations are available directly in the page, while JavaScript is used only for the live calculation.
Privacy by design
Calculator entries are processed in your browser. ClockSlate does not require employee names or server-side storage for calculations. Optional preferences are stored locally only when you choose to save them.
Accuracy and limitations
We test common shifts, overnight work, breaks, overtime thresholds and boundary values. However, employer policies and labor laws vary. ClockSlate does not determine legal entitlement, payroll compliance or tax treatment.