You can find the model number of your Dell laptop on the laptop identification label on the bottom of the computer, on the boot screen, in the Windows System Information utility, or by visiting the Dell support website.
Locate the Laptop Identification Label
Most Dell laptops have an identification label on the bottom. The label displays several certification logos, the location where the laptop was manufactured, the power requirements for the laptop, and the laptop family name -- such as Inspiron, Latitude, Precision, Studio, Vostro or XPS -- along with the model number. Locate the name of the laptop family; your model number is directly to the right of the laptop family name.
View the Power On Screen
You may also be able to find the model number when you power on or restart the laptop. On many Dell laptops, the initial boot screen, which appears before the operating system initiates, displays the family name and model number.
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Windows System Information Utility
The Windows System Information utility displays detailed information about the laptop, including the laptop model number.
Open the Start Menu. In the Search Programs and Files field, type System. In the list of search results, click System Information.
Select System Summary in the navigation pane. The System Model field displays the laptop family name and model number.
Dell Support Website
To determine your model number on the Dell Support website, enter your Service Tag number or, if for some reason you don't have your Service Tag, run the Dell System Detect Utility.
Enter Your Dell Service Tag
Find the service tag label on the bottom of your laptop. The Service Tag combines letters and numbers, and the Express Service Code contains just numbers.
Open the Dell Support website and type the Service Tag shown on the label into the Enter a Service Tag or Express Service Code field. Click the Submit button.
After a brief delay the website displays your laptop family, model number, Service Tag and Express Service code.
Dell System Detect Utility
To download and run the System Detect Utility:
Go to the Support section of Dell's website.
Scroll down the page to the section titled Identify the Product You Need to Support, locate Auto-Detect Your Product and press the Detect Product button. The site displays the Accept Terms and Conditions page.
Check the box labeled I have read and agree to the Terms and Conditions and press the Continue button. When prompted to download the application, accept to continue the download.
After the program runs on your laptop, the Dell support Web page should update to display information about your laptop, including the laptop family name and model number.