How quickly does a vampire heal?

Answer 1

There is some conflicting evidence in this. Sometimes a debilitating blow seems to have little to no effect and then sometimes a casual blow causes a permanent scar.

When Johnathan Harker hit Dracula with the shovel while he (Dracula) slept in his coffin it caused a permanent scar on his forehead.

When Beltazar was chopped up into small pieces he was able to recollect himself without any apparent mishap.

Answer 2

A vampire's healing ability can vary depending on the lore, but generally, it is portrayed as much faster than a human's. They can heal from wounds within minutes to hours, with more severe injuries taking longer to heal.