Ensure you have the WhatsApp Desktop app installed for your operating system and that it’s updated.
How to Call on WhatsApp Desktop
WhatsApp has a standard interface across devices.
WhatsApp also syncs messages across all devices, making it easy to use the app regardless of the platform.

Only one-to-one calls are supported now, though group calls may be included in future updates.
Also, you will need a microphone and camera connected to your setup for calls.
Video calling isnt supported on devices without a camera.

Open WhatsApp on your phone.
Go toSettings>Linked Devices>Link a gear.
Scan the QR Code on the desktop app with the WhatsApp scanner on your phone.
opt for contact you want to make the WhatsApp call to on WhatsApp Desktop.
Allow access to the microphone.
On Windows, selectGo To prefs>Privacy & security>Microphone.
On macOS, selectAllowto give WhatsApp access to the microphone.
ChooseEnd Callto terminate the connection when the conversation ends.
Open WhatsApp on your phone and go toSettings>Linked Devices>Link a gear.
grab the contact for the WhatsApp call.
Select theVideo callicon located next to the voice call icon.
Give WhatsApp access to the camera and the microphone on the desktop.
On Windows, selectGo To parameters>Privacy & security>Microphone.
On macOS, selectAllowto give WhatsApp access to the microphone and camera.
Start a voice call with a contact.
Hover over theCameraicon during the call.
You will see theRequest to switch to video callmouseover information on top of the camera icon.
The contact will get a request for the switchover on their mobile or desktop app.
They can choose to clickOKorSwitchto switch the call or selectCancelto decline and stay on the voice call.
For iOS, you’ll need a workaround.
choose the contact you want to block.
On Android, tapMore Options>options>Account>Privacy>Blocked Contacts>Add.
opt for contact you want to block.
To mute calls from a specific contact, pull up the contact and tap their name.
SelectCustom Notificationsand fire up the feature.
In theCall Notificationssection, selectRingtoneand chooseNone>Save.
You won’t receive any call notifications from this contact.