IST to AEST converter

Category: Time Zone Converters

- June 20, 2025

| |

India Standard Time (IST)

UTC+5:30 • Mumbai, Delhi, Bangalore, Chennai

Conversion Settings

Configure your timezone conversion preferences

Auto Convert

Daylight Saving Aware

Show UTC Offset

Australian Eastern Standard Time (AEST/AEDT)

UTC+10/+11 • Sydney, Melbourne, Brisbane, Canberra

--:--:--

Select a time to convert

Time Difference: --

UTC Offset (IST): +05:30

UTC Offset (AEST): +10:00

DST Status: --

IST Time: --

AEST/AEDT Time: --

Time Format:

Current IST: --:--:--

Current AEST/AEDT: --:--:--

🇮🇳 IST is always UTC+5:30 and never changes. AEST is UTC+10 and changes to AEDT (UTC+11) during Australian daylight saving time.

IST to AEST Conversion Guide

What is IST to AEST Conversion?

IST to AEST conversion helps you translate time between India Standard Time and Australian Eastern Standard Time zones. IST is always UTC+5:30 and never observes daylight saving time. AEST is UTC+10 and changes to AEDT (UTC+11) during Australian daylight saving time from October to April.

Time Zone Information

India Standard Time (IST): Used throughout all of India including Mumbai, Delhi, Bangalore, and Chennai. Always UTC+5:30 with no daylight saving time changes.

Australian Eastern Standard Time (AEST): Used in eastern Australia including Sydney, Melbourne, Brisbane, and Canberra. UTC+10 in winter, becomes AEDT (UTC+11) during daylight saving.

Time Difference: AEST is typically 4.5 hours ahead of IST, or 5.5 hours ahead during AEDT period.

Daylight Saving Time Impact

Winter Period (AEST): April to October - AEST is 4.5 hours ahead of IST

Summer Period (AEDT): October to April - AEDT is 5.5 hours ahead of IST

India Time: No daylight saving time changes - always UTC+5:30 year-round

Common Conversion Examples

Business Hours (Winter)

IST 9:00 AM → AEST 1:30 PM

IST 5:00 PM → AEST 9:30 PM

4.5 hour time difference during AEST period

Business Hours (Summer)

IST 9:00 AM → AEDT 2:30 PM

IST 5:00 PM → AEDT 10:30 PM

5.5 hour time difference during AEDT period

Meeting Planning

Best IST Time: 9:00 AM - 1:00 PM

Converts to AEST: 1:30 PM - 5:30 PM

Optimal overlap for business hours

Event Scheduling

IST 12:00 PM: 4:30 PM AEST / 5:30 PM AEDT

IST 8:00 PM: 12:30 AM AEST / 1:30 AM AEDT

Consider DST changes for scheduling

Conversion Tips & Best Practices

• Always check if Australian time is observing AEST or AEDT when scheduling

• IST doesn't change - it's always UTC+5:30 throughout the year

• Business meetings work best during IST morning hours (9 AM - 1 PM) for AEST coordination

• Australian DST runs from first Sunday in October to first Sunday in April

• Use 24-hour format to avoid AM/PM confusion when scheduling internationally

• Consider the 30-minute offset in IST when calculating precise meeting times

IST to AEST Time Converter: Check the Clock Across Continents

What this tool actually does for you

If you're juggling meetings or managing teams between India and Australia, this calculator is built for you. It converts time between India Standard Time (IST) and Australian Eastern Time (AEST or AEDT during daylight saving months) with precision and zero confusion. Whether you're scheduling a business call, tracking a livestream, or just trying to figure out when to catch a friend online, this tool gives you the answer in seconds.

Why you might want to use it

IST is fixed at UTC+5:30 all year round, while AEST can shift between UTC+10 and UTC+11 depending on daylight saving. That means the time gap isn’t always the same. This tool handles that for you automatically—no guessing, no Googling offsets. Just enter your time, and it shows the converted time along with all the useful details like UTC offsets and DST status.

How to use it (without overthinking it)

Start with your time

Pick the date and time in the input section under either IST or AEST (you can swap the direction of conversion). Use the dropdown if you need to change the base timezone.

Choose what to see

Auto Convert: Converts immediately when you change time or date—no button click needed.
Daylight Saving Aware: Adjusts for daylight saving in Australia between October and April. Keep this on unless you're looking at a historical time with DST off.
Show UTC Offset: Lets you see the exact offset for both time zones, which can help if you're coordinating with people outside these regions too.

Control buttons

Convert: Triggers the conversion manually (helpful when Auto Convert is off).
Swap: Switches the direction—from IST to AEST or AEST to IST.
Now: Fills in the current time from the selected timezone so you don’t have to.
Reset: Brings everything back to its original state and clears out any converted results.

Time format toggle

You can switch between 12-hour and 24-hour time with one click. If you're more comfortable reading “14:30” than “2:30 PM,” the toggle button in the lower section makes that switch fast and easy.

Features that come in handy more often than you think

Live time comparison

At the bottom, there's a live display of the current time in both IST and AEST/AEDT. It's constantly updating, so even if you're not converting a specific time, you can glance at the real-time difference at any moment.

Automatic DST checks

You don’t have to know when daylight saving starts or ends in Australia—the tool calculates it behind the scenes based on the date you choose. It even updates the displayed abbreviation (AEST or AEDT) so you know exactly what you're looking at.

Keyboard shortcuts

Enter / Space: Convert
R: Reset
S: Swap
N: Use current time
F: Toggle time format

Just don’t use these while typing in a field—otherwise, they’ll trigger unexpectedly.

Helpful visuals

The tool doesn’t just show you one result—it gives you context. You'll see:

The converted time and date in the other zone
The exact time difference (in hours)
UTC offsets for both time zones
Whether daylight saving is active on that date

Plus, it spells out the full time and date in both zones for quick comparison.

How this helps you stay on schedule without second-guessing

Coordinating across India and eastern Australia gets tricky with daylight saving in the mix. This calculator keeps things simple and accurate—so you don’t have to scroll through long tables or worry about missed meetings. Whether you’re running remote projects, planning virtual events, or just keeping in touch, this tool gives you reliable answers fast. It's one less thing to stress over in your day.