Get Installed SharePoint Farm Version Build Number/Patch Level/Service Pack

Want to know the SharePoint version installed on your environment? There are several ways to get your MOSS 2007/SharePoint 2010 version build numbers. Here are some:

How to find installed SharePoint 2013 build version? Simple! Navigate to Central Administration >> System Settings >> Servers in this Farm

1. You can find SharePoint 2007 version in Central Administration:

•     Go to Central Administration
•     Click the Operations tab.
•     Click Servers in farm under the “Topology and Services” section.

This shows the version number for the farm and each individual server in the farm.

Find what version of SharePoint is installed in SharePoint 2010:

Find out the SharePoint version you are running, Go to Central Admin >>Upgrade and Migration >> Select “Check product and patch installation status” to get the currently installed version.

2. Open any of your SharePoint site, click Site Action >> and then click Site Settings > On the Site Settings page, the version information is displayed next to the version.

3. You can identify the SharePoint version from Installed Programs. Go to Control Panel > Add and Remove Programs. Select SharePoint server and then click: Click here for support. Now a window will pop up that displays your current SharePoint version.

4. Open your SharePoint site in SharePoint Designer (can be the main site or any sub-site), click Site Settings under the Site menu on the top toolbar. You’ll find the version of SharePoint running the site on the general tab under SharePoint version

5. You can use the below code, If you want to get SharePoint version programmatically using object model:

using (SPSite startSite = new SPSite("<Central Admin url>"))
{
   SPFarm farm = startSite.WebApplication.Farm;
   console.write(BuildVersion.ToString());
}

How to get the SharePoint version using PowerShell?

To get SharePoint version using PowerShell, use this script.

$farm = [Microsoft.SharePoint.Administration.SPFarm]::Local
write-host $farm.BuildVersion
#We can use:(Get-SPFarm).BuildVersion.ToString() in SharePoint 2010 / 2013

6. Another shortcut to determine the SharePoint version: Get SharePoint version from registry key: go to the registry key: hklm\software\microsoft\shared tools\web server extensions\12.0 (or 14.0 for SharePoint 2010)

Here is the reference table:
SharePoint 2007 version numbers:

Get the latest patches from: https://technet.microsoft.com/en-us/office/sharepointserver/bb735839.aspx

SharePoint 2010 version numbers:

You can get the latest releases from: https://technet.microsoft.com/en-us/sharepoint/ff800847/

Last but not least: To check version build number for SPS 2003:
Go to Control Panel >> Add/Remove Programs >> Microsoft Office SharePoint Portal Services or Windows SharePoint Services >> Click Here for Support Information.