Choose a direction
Add time to find a future result, or subtract it to look back.
Free online tool
Add or subtract time in a few taps
Start from now, choose a shortcut, and get the answer instantly. No sign-up or time zone setup.
Starting from
Local time
How much time?
Tap a shortcut
Custom duration Days, hours & minutes
Days
Hours
Minutes
Tap, press and hold, or type any number — 90 minutes works.
One hour from now
Uses the date and time on your device. No time zone conversion.
How it works
A simpler way to calculate time
Choose whether to add or subtract, start from now or pick a date, then tap a duration. Your result updates immediately.
Tap a duration
Use a popular shortcut or open custom duration for an exact amount.
Use the result
Copy it, or continue calculating from the resulting date and time.
Popular calculations
Common time questions
FAQ
Frequently asked questions
Can I add more than 24 hours?
Yes. Open custom duration and add any combination of days, hours, and minutes.
What happens when the result crosses midnight?
The calculator automatically moves to the correct previous or next calendar date.
Does this calculator support leap years?
Yes. It uses your browser’s calendar system, including leap years and the correct number of days in each month.
Does it convert between time zones?
No. This version performs ordinary date and time calculations using your device’s local time.
Are my dates and times saved?
No. The calculation happens in your browser, and this version does not send or store the dates and times you enter.