JST to IST Converter

Category: Time Zone Converters

- July 04, 2025

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Japan Standard Time (JST)

UTC+9 • Tokyo, Osaka, Yokohama

Conversion Settings

Configure your timezone conversion preferences

Auto Convert

Show UTC Offset

Show Seconds

India Standard Time (IST)

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

--:--:--

Select a time to convert

Time Difference: --

UTC Offset (JST): +9

UTC Offset (IST): +5:30

Time Zone Status: --

JST Time: --

IST Time: --

Time Format:

Current JST: --:--:--

Current IST: --:--:--

🌏 JST is UTC+9 and IST is UTC+5:30. Both time zones do not observe daylight saving time and remain constant year-round.

JST to IST Conversion Guide

What is JST to IST Conversion?

JST to IST conversion helps you translate time between Japan Standard Time and India Standard Time. JST is UTC+9 and IST is UTC+5:30, creating a time difference of 3 hours and 30 minutes. Neither time zone observes daylight saving time, so the difference remains constant year-round.

Time Zone Information

Japan Standard Time (JST): Used throughout Japan including Tokyo, Osaka, and Yokohama. Always UTC+9 with no daylight saving adjustments.

India Standard Time (IST): Used throughout India including New Delhi, Mumbai, and Bangalore. Always UTC+5:30 with no daylight saving adjustments.

Time Difference: JST is consistently 3 hours and 30 minutes ahead of IST throughout the year.

Consistent Time Relationship

No Daylight Saving: Both Japan and India do not observe daylight saving time, making conversions straightforward

Constant Offset: The 3.5-hour difference remains fixed throughout the entire year

Half-Hour Difference: IST's unique UTC+5:30 offset creates a non-standard time difference with most time zones

Common Conversion Examples

Business Hours

JST 9:00 AM → IST 5:30 AM

JST 5:00 PM → IST 1:30 PM

Standard business day overlap

International Meetings

JST 10:00 AM → IST 6:30 AM

JST 3:00 PM → IST 11:30 AM

Coordination between Japan and India

Trading Hours

JST 9:00 AM → IST 5:30 AM

JST 3:00 PM → IST 11:30 AM

Stock market coordination

Travel Planning

JST 6:00 AM → IST 2:30 AM

JST 11:59 PM → IST 8:29 PM

Flight scheduling reference

Conversion Tips & Best Practices

• JST is always 3 hours and 30 minutes ahead of IST throughout the year

• Neither Japan nor India observes daylight saving time, ensuring consistent conversion

• To convert JST to IST, subtract 3 hours and 30 minutes

• IST dates may change when converting early morning JST times

• IST's half-hour offset makes it unique among Asian time zones

• Both time zones serve as important business hubs in the Asian region

Convert Japan and India Time

Need to line up a call between Tokyo and Mumbai? Or schedule something across Osaka and Bangalore? This tool helps you match Japan Standard Time (JST) with India Standard Time (IST) in a clean, straightforward way. Here's how these zones line up:

Japan Standard Time (UTC+9)	India Standard Time (UTC+5:30)
🇯🇵 Japan	🇮🇳 India 🇱🇰 Sri Lanka

Why you’d want this time converter in your back pocket

Coordinating across time zones can get messy fast. If you're setting up a remote meeting, booking a flight, or syncing a deadline across Japan and India, there's no room for guesswork. The JST to IST converter keeps things simple by showing you exactly what time it is in one zone when you choose a time in the other. No mental math. No conversion charts. Just the info you need right away.

How the calculator works behind the scenes

You choose a time and date, pick whether you’re starting in Japan or India, and the converter instantly shows you what that time looks like in the other zone. It uses accurate UTC offsets, +9 for JST and +5:30 for IST, and skips the confusion of daylight saving time, since neither region changes clocks seasonally.

There’s also a live display of the current time in both zones, updated every second. That means even if you're just checking the clock, it works as a dual-time watch.

Setting it up: what to click and what it does

Pick your base time

Use the date and time fields to select a moment in either Japan or India. You can toggle between the two zones using the dropdown menu or the swap button. Once you input the details, the tool shows the exact converted time in the second zone.

Press a button, or let it convert on the fly

If “Auto Convert” is turned on, the tool does the conversion the moment you adjust the time or date. Prefer doing it manually? Turn auto convert off and hit the “Convert Time” button when you’re ready.

Use quick actions for convenience

Swap: Switches input and output zones instantly
Now: Sets the input time to the current moment in your selected zone
Reset: Returns the whole calculator to its default setup

See it how you like it

You can show or hide seconds and switch between 12-hour and 24-hour formats with one click. If you want to double-check your math, turn on “Show UTC Offset” to see the exact time difference numerically.

What’s different about JST and IST

Japan is 3 hours and 30 minutes ahead of India, always. That doesn’t change during the year. So if it’s 6:00 AM in Delhi, it’s 9:30 AM in Tokyo. No seasonal jumps to worry about.

A real-world case: planning between Japan and India

Say you’re organizing a team presentation between colleagues in Kyoto and Hyderabad. If your Japanese team is available at 4:00 PM JST, this converter instantly tells you it’s 12:30 PM IST - perfectly timed for lunch-hour meetings in India. This kind of clear view keeps scheduling tight and misunderstandings out of the picture.

Save time every time you check the clock

The beauty of this calculator is in its consistency. You get accurate conversions, live time updates, and quick swaps between Japan and India with just a few clicks. Whether you're managing deadlines or just planning a casual chat, it takes the edge off time zone confusion. That means fewer mistakes and more time focused on what really matters.