Time Utility
Timezone conversion, duration, arithmetic, and format conversion — all instant, all local.
Timezone Converter
| City / Zone | Time | Date | Offset |
|---|---|---|---|
| UTC source | 12:00 | Tue, Jun 23 | GMT |
| Los Angeles | 05:00 | Tue, Jun 23 | GMT-7 |
| Chicago | 07:00 | Tue, Jun 23 | GMT-5 |
| New York | 08:00 | Tue, Jun 23 | GMT-4 |
| São Paulo | 09:00 | Tue, Jun 23 | GMT-3 |
| London | 13:00 | Tue, Jun 23 | GMT+1 |
| Paris / Berlin | 14:00 | Tue, Jun 23 | GMT+2 |
| Cairo | 15:00 | Tue, Jun 23 | GMT+3 |
| Dubai | 16:00 | Tue, Jun 23 | GMT+4 |
| Mumbai / Delhi | 17:30 | Tue, Jun 23 | GMT+5:30 |
| Singapore | 20:00 | Tue, Jun 23 | GMT+8 |
| Tokyo | 21:00 | Tue, Jun 23 | GMT+9 |
| Sydney | 22:00 | Tue, Jun 23 | GMT+10 |
| Auckland | 00:00 | Wed, Jun 24 ↕ | GMT+12 |
Duration
08:30 h m
510 minutes total
Add / Subtract
+ 2h 30m
12:30
− 2h 30m
07:30
12h ↔ 24h
2:30 PM
14:30
About
The Time Utility bundles several time-related tools: a timezone converter that shows any time in another timezone, a duration calculator that finds the difference between two times, an add/subtract utility, and a 12-hour/24-hour format converter. All tools work offline in your browser.
How to use
- 1 Select a tab: Timezone Converter, Duration, Add/Subtract, or Format.
- 2 For Timezone Converter: enter a time, select the source and target timezones.
- 3 For Duration: enter start and end times to get the hours and minutes between them.
- 4 For Format: enter a 12h or 24h time to convert it to the other format.
- How do I convert a time from New York to London?
- Open the Timezone Converter tab, enter the time in New York, select "America/New_York" as the source timezone, and "Europe/London" as the target. The converted time appears instantly, automatically accounting for the current UTC offset difference and any daylight saving time in effect.
- How do I calculate how many hours are between two times?
- Use the Duration tab. Enter the start time and end time — the tool calculates the total duration in hours and minutes. If the end time is earlier than the start time, the tool assumes the period crosses midnight and calculates accordingly (e.g. 22:00 to 06:00 = 8 hours).
- What is the difference between 12-hour and 24-hour time format?
- 12-hour format uses AM and PM to distinguish morning and afternoon (12:00 AM is midnight, 12:00 PM is noon). 24-hour format (also called military time) runs from 00:00 to 23:59 with no AM/PM ambiguity — 14:30 is always 2:30 in the afternoon. The Format tab converts between the two in one click.