---
title: What is the difference between UTC / GMT?
description: What is the difference between UTC / GMT?
---

[Skip to content](https://knowledge-software.noc-innovations.com/what-is-the-difference-between-utc-/-gmt#main-content)

English

Show submenu for translations

![NOCI logo.png\]](https://knowledge-software.noc-innovations.com/hs-fs/hubfs/NOCI%20logo.png?height=50&name=NOCI%20logo.png)

Open main navigation

Close main navigation

- English
  
  Show submenu for translations
- www.noc-innovations.com

 www.noc-innovations.com

 Hello. How can we help you?

- There are no suggestions because the search field is empty.

1. [Software Support](https://knowledge-software.noc-innovations.com/?hsLang=en)
2. [Tide Information](https://knowledge-software.noc-innovations.com/tide-information?hsLang=en)

# What is the difference between UTC / GMT?

Coordinated Universal Time (UTC) and Greenwich Mean Time (GMT) are basically the same. UTC is the primary time standard by which the world regulates time. For most purposes, UTC is synonymous with GMT but GMT is no longer precisely defined by the scientific community. 

- [Services - Polpred Offshore](https://knowledge-software.noc-innovations.com/services-polpred-offshore?hsLang=en#main-content)
  
  
  
  
  
    - [Functionality](https://knowledge-software.noc-innovations.com/services-polpred-offshore?hsLang=en#functionality)
    - [Visualisation](https://knowledge-software.noc-innovations.com/services-polpred-offshore?hsLang=en#visualisation)
    - [Ease of Access](https://knowledge-software.noc-innovations.com/services-polpred-offshore?hsLang=en#ease-of-access)
    - [Model Data](https://knowledge-software.noc-innovations.com/services-polpred-offshore?hsLang=en#model-data)
- [Tide Information](https://knowledge-software.noc-innovations.com/tide-information?hsLang=en)
- [Poltips](https://knowledge-software.noc-innovations.com/poltips?hsLang=en)
- [Terms and Conditions](https://knowledge-software.noc-innovations.com/terms-and-conditions?hsLang=en#main-content)
  
  
  
  
  
    - [Tidal Prediction Data](https://knowledge-software.noc-innovations.com/terms-and-conditions?hsLang=en#tidal-prediction-data)
- [TASK](https://knowledge-software.noc-innovations.com/task?hsLang=en)
- [Orders and Sales](https://knowledge-software.noc-innovations.com/orders-and-sales?hsLang=en)

# National Oceanography Centre

www.noc-innovations.com Help Center

Copyright © 2026, National Oceanography Centre