How To Calculate Attrition Rate

Hi all,
Can anybody let me know as to how do i calculate attrition rate?
and what are the measures which i need to take to control attrition in any organisation...

Hi,
There are so many ways of attrition calculation. Usually,following formula is used across the industry:
No of employees releived during the year / (No of employees during the start of the year + No. of employees joined during that year)
Hope this is useful.
Regards,
Shrithi.

Hi,
the formula given by Shrithi is also in used by lot of org. apart from this following formula is also in used
= No. of Emp. resigned / Avg. no. of employeed *100
Avg. no. of employees = (Op. Bal + Closing Bal)/2
You can calculate monthly, quart., Annual attrition rate
Regards,
Shailesh