WEST to GMT Converter

Category: Time Zone Converters

- June 28, 2025

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Western European Summer Time (WEST)

UTC+1 • Lisbon, Porto, Azores

Conversion Settings

Configure your timezone conversion preferences

Auto Convert

Daylight Saving Aware

Show UTC Offset

Greenwich Mean Time (GMT)

UTC+0 • London, Dublin, Reykjavik

--:--:--

Select a time to convert

Time Difference: --

UTC Offset (WEST): +01:00

UTC Offset (GMT): +00:00

DST Status: --

WEST Time: --

GMT Time: --

Time Format:

Current WEST: --:--:--

Current GMT: --:--:--

🌍 WEST is UTC+1 (summer time) and GMT is UTC+0. During winter, Portugal and other WEST regions use WET which equals GMT.

WEST to GMT Conversion Guide

What is WEST to GMT Conversion?

WEST to GMT conversion helps you translate time between Western European Summer Time and Greenwich Mean Time zones. WEST is UTC+1 (used during summer months) and GMT is UTC+0. WEST is 1 hour ahead of GMT during daylight saving period.

Time Zone Information

Western European Summer Time (WEST): Used in Portugal, Canary Islands, and parts of Morocco during summer months (March to October). UTC+1 during daylight saving time.

Greenwich Mean Time (GMT): The historical time standard based on the Royal Observatory in Greenwich, London. UTC+0 and equivalent to Coordinated Universal Time (UTC) for practical purposes.

Time Difference: WEST is 1 hour ahead of GMT during the summer months when daylight saving time is observed.

Daylight Saving Time Impact

WEST Period: From last Sunday in March to last Sunday in October (UTC+1)

WET Period: From last Sunday in October to last Sunday in March (UTC+0, same as GMT)

GMT Consistency: GMT never changes and remains UTC+0 year-round as the global time reference

Common Conversion Examples

Summer Period (WEST)

WEST 10:00 AM → GMT 9:00 AM

WEST 6:00 PM → GMT 5:00 PM

Subtract 1 hour from WEST

Winter Period (WET)

WET 10:00 AM → GMT 10:00 AM

WET 6:00 PM → GMT 6:00 PM

Same time during winter

Business Coordination

Lisbon Meeting: 2:00 PM WEST

London Time: 1:00 PM GMT

Easy coordination with UK

International Scheduling

WEST Noon: GMT 11:00 AM

WEST Midnight: GMT 11:00 PM (previous day)

Simple 1-hour difference

Conversion Tips & Best Practices

• During summer (March-October): subtract 1 hour from WEST to get GMT

• During winter (October-March): WET equals GMT - no conversion needed

• GMT is the global time reference and never changes for daylight saving

• Portugal mainland, Madeira, and Canary Islands use WEST/WET

• Excellent for coordination between Western Europe and UK/Ireland

• GMT is used in aviation, computing, and scientific applications worldwide

WEST to GMT Time Converter

Whether you're managing a project across Lisbon and London or just trying to catch a live event at the right moment, time zones can get in the way. This WEST to GMT Time Converter clears that up with a straightforward, flexible tool that handles the shift between Western European Summer Time and Greenwich Mean Time without any second-guessing.

Why Use This Time Converter?

WEST (Western European Summer Time) is one hour ahead of GMT during the summer months. That sounds simple enough, until you throw in daylight saving changes, meetings across borders, or different formats of displaying time. This calculator helps you skip the mental math, avoid missed calls, and stay on the same page with others, whether you’re in Porto or Paddington.

How the Converter Works

Set Your Time

You start by selecting a date and time from the input section. You’ll also choose whether your input is in WEST or GMT using a dropdown menu. The display updates as soon as you fill it out, provided you leave the “Auto Convert” option checked.

View the Results Instantly

The converted time shows up clearly on the other side, along with useful extras like the date, time difference, and whether daylight saving time is in effect. You’ll also see the UTC offsets if you choose to display them.

Quick Actions to Save Time

Convert Time: Press the convert button if you’ve turned off Auto Convert.
Swap: Flip the input and output zones instantly.
Now: Drop in the current time based on your selected zone.
Reset: Go back to the default setup and clear any previous conversions.

Built-In Tools That Make It Smarter

Auto Convert Mode

Let the tool work for you. With Auto Convert turned on, the result updates the moment you change the time or date. You don’t need to press anything.

Daylight Saving Awareness

Tick the DST option to make sure the tool takes seasonal changes into account. WEST shifts back to WET (same as GMT) during the winter months, and this feature keeps everything accurate without you needing to know the rules.

Optional UTC Offsets

Want to double-check the math or coordinate with folks who think in offsets? Turn on the “Show UTC Offset” checkbox to display each zone’s current offset from UTC.

12-Hour or 24-Hour Format

Click the format toggle to switch between familiar 12-hour time and standard 24-hour display, depending on your preference.

Live Clocks for Context

You’ll always see the current time in both WEST and GMT along the bottom of the tool, updating every second so you stay grounded in real time while you plan ahead.

A Real-World Example: Lisbon to London

Let’s say you’re planning a Zoom call from Lisbon to a team in London. You pick 3:30 PM on a Monday. The converter shows it as 2:30 PM in GMT, since WEST is one hour ahead during the summer. In winter, both cities are on GMT, so 3:30 PM in Lisbon would still be 3:30 PM in London. Simple. Reliable. No mix-ups.

Smart Ways to Avoid Common Mistakes

During summer (March to October), always subtract one hour from WEST to get GMT.
During winter, WEST becomes WET, which lines up exactly with GMT. No conversion needed.
If you’re not seeing a conversion, check that both date and time fields are filled.
The tool will automatically adjust for DST based on the date you select, as long as the DST checkbox is on.
Want to switch zones fast? Use the “Swap” button or hit the “S” key on your keyboard.

Keep Your Calendar Clear and Your Clock Aligned

There’s enough to think about in your day without adding time zone confusion to the mix. This WEST to GMT Time Converter gives you clarity with just a couple of clicks. Whether you're catching a flight, joining a webinar, or making sure your coffee chat lines up across countries, this tool makes sure you're always on time, even if your schedule spans borders.