JST to SGT Converter

Category: Time Zone Converters

- June 26, 2025

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Japan Standard Time (JST)

UTC+9 • Tokyo, Osaka, Yokohama

Conversion Settings

Configure your timezone conversion preferences

Auto Convert

Daylight Saving Aware

Show UTC Offset

Singapore Standard Time (SGT)

UTC+8 • Singapore

--:--:--

Select a time to convert

Time Difference: --

UTC Offset (JST): +09:00

UTC Offset (SGT): +08:00

DST Status: --

JST Time: --

SGT Time: --

Time Format:

Current JST: --:--:--

Current SGT: --:--:--

🇯🇵 JST is always UTC+9 and SGT is always UTC+8. Neither timezone observes daylight saving time, making JST consistently 1 hour ahead of SGT.

JST to SGT Conversion Guide

What is JST to SGT Conversion?

JST to SGT conversion helps you translate time between Japan Standard Time and Singapore Standard Time zones. JST is always UTC+9 and SGT is always UTC+8, making JST consistently 1 hour ahead of SGT. Neither timezone observes daylight saving time.

Time Zone Information

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

Singapore Standard Time (SGT): Used in Singapore. Always UTC+8 with no daylight saving time adjustments.

Time Difference: JST is always 1 hour ahead of SGT year-round since neither timezone observes daylight saving time.

Stable Time Relationship

Year-Round Consistency: Both JST and SGT maintain fixed UTC offsets throughout the year

No Daylight Saving: Neither Japan nor Singapore observes daylight saving time

Predictable Difference: JST is always exactly 1 hour ahead of SGT, making scheduling straightforward

Common Conversion Examples

Business Hours

JST 9:00 AM → SGT 8:00 AM

JST 6:00 PM → SGT 5:00 PM

1 hour time difference year-round

Meeting Planning

JST 10:00 AM → SGT 9:00 AM

JST 3:00 PM → SGT 2:00 PM

Ideal overlap for business meetings

Event Scheduling

JST Midnight → SGT 11:00 PM (previous day)

JST Noon → SGT 11:00 AM

Simple 1-hour subtraction

Travel Planning

Tokyo 2:00 PM → Singapore 1:00 PM

Osaka 8:00 AM → Singapore 7:00 AM

Consistent for flight scheduling

Conversion Tips & Best Practices

• JST is always 1 hour ahead of SGT - no seasonal variations to remember

• Neither timezone observes daylight saving time, making conversion calculations simple

• Business hours overlap excellently between 9 AM - 5 PM in both timezones

• When it's midnight in Japan (JST), it's 11 PM the previous day in Singapore

• Use 24-hour format to avoid AM/PM confusion in international scheduling

• Perfect timezone pair for Asia-Pacific business with minimal time difference

Convert Time Between JST and SGT

Two cities, one hour apart - get it right every time

If you’ve ever scheduled a call between Tokyo and Singapore, you know the routine. You pull up world clocks, double-check your calendar, and still wonder: did I get the time right? This JST to SGT time converter was built to take that stress off your plate. It gives you a fast, clear way to translate time between Japan Standard Time (JST) and Singapore Standard Time (SGT) - and it never forgets that JST is always 1 hour ahead.

Pick a time, get the answer - here’s how it works

Your input controls everything

You start by picking a date and time using two simple inputs: a calendar-style date picker and a clock-style time selector. From there, you choose your input timezone: either Japan Standard Time (JST) or Singapore Standard Time (SGT). These are the only two zones this tool focuses on, and that's on purpose—it keeps the interface sharp and free from distractions.

Switch zones whenever you want

Need to flip the direction of conversion? Hit the “Swap” button and the calculator switches your input and output timezones instantly. No need to retype anything. There's also a “Now” button that grabs the current time in your selected timezone and loads it into the input for instant conversion.

See results with one click - or none at all

By default, the calculator is set to “Auto Convert,” so as soon as you update a date or time, it automatically recalculates the result. Prefer to work manually? You can turn that off and click the “Convert Time” button when you’re ready. You’ll see:

The converted time

The time difference (always 1 hour)

UTC offsets, if you want them

Extra settings for more control

Customize your format

If you prefer seeing times in 24-hour format, a single button toggles between 12-hour and 24-hour displays. This affects not only your conversion results, but also the live clocks that show current time in both JST and SGT right on the page.

Turn features on or off as needed

Here are some extra toggles built into the settings panel:

Auto Convert: Updates the result every time you change the input
Daylight Saving Aware: Included for compatibility, though JST and SGT never use DST
Show UTC Offset: Adds precise UTC+9 or UTC+8 tags to help you confirm the time difference

What makes this converter so reliable?

No daylight saving surprises

Both JST and SGT follow fixed UTC offsets year-round. That means the time difference between them is always exactly one hour. You won’t need to check seasonal calendars or hunt down regional rules. The calculator reflects this by stating it clearly in every conversion result and including a note at the bottom of the tool for quick reference.

Handles full date-and-time conversions

You're not just converting a clock time. The tool takes full dates into account, so it accurately adjusts for day changes when converting midnight, early morning, or late-night times. For example, if it’s 12:00 AM in Tokyo, it correctly shows 11:00 PM the previous day in Singapore.

Live time display built in

Want to see what time it is right now in either city? The live clocks under the settings panel keep track of the current time in both JST and SGT, updating every second. Great for quick reference while planning your day.

Step-by-step: using the converter

Select the date and time you want to convert
Pick whether you’re starting from JST or SGT
Watch the conversion happen automatically, or click “Convert Time”
Review the result, including the time, date, and UTC offsets if enabled
Click “Swap” to reverse direction if needed

A few helpful tips before you start

If you're scheduling across timezones often, turn on 24-hour mode for clarity
The “Reset” button brings everything back to the default view - JST input, current date and time
You can also hit “Now” at any time to auto-fill the current local time
Keyboard shortcuts are supported for power users - space or enter to convert, “S” to swap, “N” for now, “R” to reset, and “F” to toggle formats

Keep your plans clear - no timezone mix-ups

This tool gives you just what you need when converting between Japan and Singapore: speed, accuracy, and zero confusion. Whether you're coordinating a video call, booking a flight, or just trying to figure out when to hit send on an email, it’s ready to keep you on track. One hour apart, always - now you’ll always get it right.