# Confusion with units : MeV/C2

So 1u = 931.5Mev/c2 = 1.67 10_27 kg . the thing is when i calculate E=mC2 with both units the calculations dont match . i can't understand why .

## Answers and Replies

kith
Science Advisor
We can't help you to find your error, if you don't show your calculations.

Amine_prince
We can't help you to find your error, if you don't show your calculations.
Thank you for the attention sir . unfortunately i am using my phone to type so i cannot write all the calculation . can you please write the Energy released out of a mass defect of 1u by using Kg first then MeV /C2 as the unit of mass ? That can solve my problem

The problem is solved . thank you

ZapperZ
Staff Emeritus
Science Advisor
Education Advisor
Thank you for the attention sir . unfortunately i am using my phone to type so i cannot write all the calculation . can you please write the Energy released out of a mass defect of 1u by using Kg first then MeV /C2 as the unit of mass ? That can solve my problem

Please note that this is usually not an acceptable excuse to not lay out the full and complete post. It is why the PF Rules also prohibit text-speak.

Zz.