Keep seeing different variations of this question. Is there a formula to calculate this? Thanks in advance! Trucker Access › Forums › Drivers lounge ” no politics” › Keep seeing different variations of this question. Is there a formula to calculate this? Thanks in advance! This topic has 0 replies, 1 voice, and was last updated 1 year, 1 month ago by EazyRiDer66. You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In