Free · private · no signup

Time tools that get you to the answer faster.

Calculate time duration, work hours, time cards, decimal hours, overtime pay, and business days without accounts, clutter, or sending your calculator entries to a server.

Calculate time duration Calculate work hours

PPrivate calculations0No account required↯Instant resultsMMobile friendly

Core utilities

Choose what you need to calculate

Each tool solves a distinct job instead of sending you through a maze of nearly identical pages.

Time Duration Calculator

Find the exact elapsed time between two clock times in hours, minutes, seconds, decimal hours, and total minutes.

Calculate duration

Work Hours Calculator

Repeat a daily shift across the week, subtract breaks, apply rounding, and estimate overtime and gross pay.

Open calculator

Time Card Calculator

Weekly or biweekly clock-in/out cards with breaks, overtime, browser autosave, printing, and CSV export.

Build time card

Hours to Decimal Calculator

Convert hours, minutes, and seconds into payroll-friendly decimal hours, or reverse the conversion.

Convert time

Overtime Pay Calculator

Estimate regular, overtime, optional double-time, and gross pay with editable thresholds and multipliers.

Estimate overtime

Business Days Calculator

Count, add, or subtract workdays with custom non-working weekdays and excluded closure dates.

Calculate workdays

Useful first. Everything else second.

The core math runs locally and the interface stays focused on the calculation.

Browser-localCore calculations

ResponsiveDesktop to phone

ConnectedOne focused tool family

Built around real tasks

Work Hours Hub is a connected family of time, work, payroll-time, and deadline utilities. We build separate pages when the task itself is different, not merely because another keyword exists.

Fast by design

The site avoids unnecessary runtime dependencies, keeps the calculator interface immediately available, and uses browser-side calculations for the core tools so common interactions do not wait on a server round trip.