Time Calculator
Calculate difference between times or add/subtract hours, minutes, seconds
Instantly calculate time differences or add and subtract hours, minutes, and seconds with precision — all online, completely free.
Calculate difference between times or add/subtract hours, minutes, seconds
Easily calculate time differences or add and subtract hours, minutes, and seconds with our free online Time Calculator — fast, accurate, and simple to use.
Select between "Time Difference" to compare two times or "Add/Subtract" to modify a time by adding or subtracting hours, minutes, seconds.
Input your times using the time picker or quick presets. For multi-day calculations, enable date options for accurate results across days.
Receive comprehensive breakdown including total hours, minutes, seconds, and formatted time differences with clear calculation details.
Fast, accurate, and private — the easiest way to calculate or manage time online for any task or schedule.
Exact time calculations accounting for seconds, minutes, hours, and multi-day spans with 100% accuracy.
Calculate time differences AND add/subtract time in one tool. Switch between modes instantly.
Handle time spans across multiple days with optional date inputs for payroll, project tracking, and more.
No hidden costs, watermarks, or limitations. Unlimited calculations without registration.
Fully responsive design works perfectly on desktop, tablet, and mobile devices.
Common time presets like "Now", business hours, and meal times for faster calculations.
Plan work shifts, track hours, or calculate durations for travel, events, and daily schedules.
Calculate work hours, meeting durations, project timelines, and time allocations for accurate billing.
Accurate time tracking for employee hours, overtime calculations, and attendance records.
Schedule events, calculate durations, and manage timelines for seamless event coordination.
Time management for study sessions, class durations, and academic project planning.
Calculate travel durations, flight times, and arrival estimates across time zones.
Track exercise durations, cooking times, medication schedules, and daily routines.
Common questions about calculating time differences, adding, or subtracting time online.
Select "Time Difference" mode, enter your start and end times, and click calculate. The tool shows the difference in hours, minutes, and seconds with a detailed breakdown.
Yes! Use "Add/Subtract" mode to add or subtract hours, minutes, and seconds from any base time. Perfect for scheduling and time projections.
Enable "Include dates" in Time Difference mode and select your start and end dates. The calculator automatically handles multi-day spans accurately.
Our calculator provides 100% accurate results down to the second, handling time carry-overs (60 seconds to minutes, 60 minutes to hours) automatically.
Absolutely! The calculator is fully responsive and works perfectly on smartphones, tablets, and desktop browsers without any downloads.
Yes. All calculations happen locally in your browser. Your time data and results are never stored, transmitted, or shared — ensuring complete privacy.