How end-of-service gratuity works in Qatar
Under Article 54 of Labour Law No. 14 of 2004, a worker with one year or more of service gets at least three weeks' (21 days') wage per year, on the last basic wage, with part years pro rata.
The calculator shows that legal minimum, with a day's wage = basic ÷ 30. The law has no cut for resignation, and your contract can give more.
Estimate only. Check with Qatar's Ministry of Labour to be sure.