what is the formula to calculate time dilation due to acceleration. I have tried to search in google to find out the answer but I couldn't find any equation to calculate the time dilation due to acceleration

Let me preface this as I am not a physics expert but this is something I was wondering as I would love a technical explination. For ex.: say a person is walking with an filled plastic grocery bag and you can tell that the handle might rip just due to the pressure between your fingers and the hand...