Time Tools & Calculators

Date math for planning projects, schedules, and deadlines. Choose calendar days, weekdays, or workdays (with optional holidays).

Tools in this category

Days From Calculator

Calculate days between two dates with calendar days, weekdays, or workdays.

Days Until Calculator

Count days until a target date (calendar days, weekdays, or workdays) with clear outputs.

Work Hours Calculator (Timesheet)

Calculate weekly hours, regular vs overtime, and estimated pay. Export CSV or print.

Guide: date math and accurate timesheets

Date calculations can differ depending on whether you count calendar days, weekdays, or workdays. For timesheets, record start/end/breaks consistently and export CSV for clean payroll records.

Read the time tools guide

Choosing the right day count

Calendar days

Best for countdowns and real-world dates where weekends still matter.

Weekdays / workdays

Best for business timelines, school schedules, and staffing estimates.

Timesheet best practices

Set a week start date to prevent mismatched days.
Record breaks consistently and decide whether breaks are paid.
Separate regular vs overtime so pay calculations stay transparent.
Export CSV to share with payroll or keep a personal record.

For sourcing and corrections standards, see the Editorial & Accuracy Policy.

Planning tip

For delivery estimates, compare both calendar days and workdays to avoid surprises.