When you want to know your h-index, you have to start by finding your publications in a citation database, i.e. Web of Science,  Scopus or Google Scholar.

Web of Science

1. Search for your name in the Author field (or search by your ORCID/ResearcherID):
   
   
   
2. When your publications are listed, choose ”Create Citation Report”:
   
   
   
3. Citation Report gives you the h-index:
   

Scopus

1. Search for your name in the Author field (or by your ORCID):
   
   
   
2. When your publications are listed, mark them and choose ”View Citation Overview”:
   
   
   
3. Citation Overview gives you the h-index
   

Google Scholar

There are two tools available for getting citation metrics based on Google Scholar-publications:

1. Google Scholar Citations - you can create a profile (private or public) and add your publications, and then your citation metrics are computed and presented.
2. Download Publish or Perish – a software programme that retrieves and analyzes academic citations. It uses Google Scholar to obtain raw citations. Search by Author’s name to see your metrics.