How to no when is my ovulation

I have been married since last year July but I have not conceive I dont really no how to calculate when my ovulation will start because my period last for only three days .I sew the last one on the 6 of this month pls when is my ovulation day

welcome on board @Efe_Benjamin please use the ovulation clculation on this forum , it is very helpful to calculate ovulation date. I hope this helps.

I have tried using the ovulation calculator but is not working

Try get ovulation test strip