Time Calculator

Overview

Calculate net duration from start and end times, subtract unpaid breaks, add or subtract hours and minutes, and total weekday work hours without opening a spreadsheet.

Best for

• Calculating hours and minutes between two times.
• Subtracting lunch or unpaid break minutes from a shift.
• Adding or subtracting time from a start time.
• Totaling a simple weekday time card.

Not for

• Payroll compliance, overtime rules, official timesheets, labor-law calculations, or employee recordkeeping.
• Time zones, date-aware elapsed time across multiple days, paid leave, or company-specific rounding policies.

How it works

1. Choose hours between times, add/subtract time, or work hours.
2. Enter start and end times, break minutes, or the time offset.
3. Review hours and minutes, decimal hours, or the weekly work total.

Limits and privacy

The calculator uses time-of-day inputs and simple minute math. It does not apply payroll rounding, overtime rules, public holidays, time zones, labor-law compliance, paid leave, or company-specific policies.

Common uses

• Calculate a shift from 9:00 to 17:00 with a 30-minute break.
• Find the time 1 hour 30 minutes after a start time.
• Estimate weekly work hours across Monday through Friday.
• Convert worked time into decimal hours before invoicing.

Useful facts

• Tiny Work Tools Time Calculator runs locally in the browser.
• It supports duration, add/subtract, and simple work-hours modes.