Time Offset Calculator
Frequently Asked Questions
This calculator lets you add or subtract hours and minutes from any time. Enter a starting time, choose to add or subtract, enter the duration, and instantly see the result. Perfect for scheduling, planning, and time calculations.
Yes! Use the toggle to switch between Add (+) and Subtract (−) modes. The calculator handles both operations with full accuracy, including crossing midnight.
Yes, the calculator correctly handles midnight crossovers. If your calculation crosses into the next or previous day, it will show a label like "(next day)" or "(previous day)" to indicate the date change.
Yes! Toggle "Use date" to ON and select a specific date for your calculation. The result will show both the calculated time and the resulting date.
Yes, the calculator uses your local timezone automatically. All calculations are performed in your browser using your device's timezone settings.
Completely free with no signup required. Just open the page and start calculating. No ads, no registration, no limits.
Yes, the calculator is fully responsive and works on all devices including smartphones, tablets, and desktop computers.
The calculator uses native JavaScript Date arithmetic which correctly handles DST transitions. Your browser automatically accounts for daylight saving time changes.