The formula of calculating gratuity is
1
Gratuity (Monthly salary/25) × 15 × No. of-years of service.
2
Gratuity (Monthly salary/30) × 15 × No of years of service.
3
Gratuity (Monthly salary /26) × 15 × No of years of service.
4
Gratuity (Monthly salary/15) × 15 × No of years of service.