15 RM to 10 RM conversion?

[abckid24]

hey. i'm on my first cycle. just finished the 15's. i'm on my way to 10's but i want to start right away because i am doing something next weekend. i understand the most accurate way to find your max is to test it.. but i really need to start. is there a formula to calculate your 10 RM based on your 15 RM?

thanks.

 

[jvroig]

Add 20% to get your 10RM, then add 15% to your 10RM to get your 5RM. Much better to actually test them, but this here's a good estimate.