GMT to AST Converter

Convert Greenwich Mean Time (GMT) to Atlantic Standard Time (AST) instantly

PST - Pacific Standard Time

-4 hrs

Wed, Jul 15, 2026

EST - Eastern Standard Time

--:-- --

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GMT to AST Conversion Table

The table below shows hourly time conversions from Greenwich Mean Time (GMT) to Atlantic Standard Time (AST). AST is -4 hours from GMT. Business hours (9 AM - 5 PM) are highlighted in blue for easy scheduling across these time zones.

GMT	AST	Note

About GMT & AST

Greenwich Mean Time (GMT)

UTC Offset: UTC+0

Regions: London, Dublin, Lisbon, Accra

Atlantic Standard Time (AST)

UTC Offset: UTC-4

Regions: Puerto Rico, Nova Scotia, Caribbean

What time is it now in GMT?

The current time in GMT is

What time is it now in AST?

The current time in AST is

The Greenwich Mean Time (GMT) is +4 hours behind Atlantic Standard Time (AST).

タイムゾーン変換が必要な場面

Remote Meetings

Schedule calls with international teams across different time zones.

Travel Planning

Know the local time at your destination before you arrive.

Stock Markets

Track market opening and closing times across global exchanges.

Live Events

Never miss a live stream, sports event, or product launch.

Software Development

Coordinate deployments and standups with distributed teams.

International Calls

Call friends and family at appropriate hours across the world.

よくある質問

What is the time difference between GMT and AST?

AST is -4 hours from GMT. Greenwich Mean Time is UTC+0 and Atlantic Standard Time is UTC-4.

What regions use GMT?

Greenwich Mean Time (GMT) is used in: London, Dublin, Lisbon, Accra.

What regions use AST?

Atlantic Standard Time (AST) is used in: Puerto Rico, Nova Scotia, Caribbean.

このタイムゾーン変換ツールは無料ですか？

はい、完全無料で登録不要です。対応するすべてのタイムゾーン間で無制限に変換できます。

サマータイムに対応していますか？

固定UTCオフセットを使用しています。サマータイム調整には、適切なDSTバリアント（例：米国の夏季はESTの代わりにEDT）を選択してください。

Convert GMT to Other Time Zones

GMT to PST GMT to PDT GMT to MST GMT to MDT GMT to CST GMT to CDT GMT to EST GMT to EDT GMT to ADT GMT to NST GMT to NDT GMT to BRT GMT to HST GMT to HDT GMT to AKST GMT to AKDT GMT to SST GMT to CHST GMT to UTC GMT to BST GMT to WET GMT to WEST GMT to CET GMT to CEST GMT to MET GMT to MEST GMT to EET GMT to EEST GMT to MSK GMT to IST GMT to CAT GMT to WAT GMT to EAT GMT to SAST GMT to IST GMT to IST GMT to IDT GMT to PKT GMT to BDT GMT to ICT GMT to WIB GMT to WITA GMT to WIT GMT to SGT GMT to HKT GMT to CST GMT to CST GMT to PST GMT to JST GMT to KST GMT to AWST GMT to ACST GMT to ACDT GMT to AEST GMT to AEDT GMT to NZST GMT to NZDT

Convert AST to Other Time Zones

AST to PST AST to PDT AST to MST AST to MDT AST to CST AST to CDT AST to EST AST to EDT AST to ADT AST to NST AST to NDT AST to BRT AST to HST AST to HDT AST to AKST AST to AKDT AST to SST AST to CHST AST to UTC AST to BST AST to WET AST to WEST AST to CET AST to CEST AST to MET AST to MEST AST to EET AST to EEST AST to MSK AST to IST AST to CAT AST to WAT AST to EAT AST to SAST AST to IST AST to IST AST to IDT AST to PKT AST to BDT AST to ICT AST to WIB AST to WITA AST to WIT AST to SGT AST to HKT AST to CST AST to CST AST to PST AST to JST AST to KST AST to AWST AST to ACST AST to ACDT AST to AEST AST to AEDT AST to NZST AST to NZDT