Not with several years of high acreage mowing/bidding experience. I never measure square footage, unless i'm giving someone a price to spray or fertilize it. You have to do that for your records anyway, otherwise the Dept. of Ag. will be all over ya. As far as mowing, when you own a commercial machine, you know how many acres you can cut per hour with it. This is how you figure up the man hours, along with sizing up the trimming, edging, and clean-up. If you have multiple machines, you just do your math. I don't think there's a set formula though, if that's what you're asking. There is when it comes to applications, but not really mowing.
8 years in the business.
Oklahoma Licensed Pesticide Applicator (3a)
2013 Hawkline 7x16 Enclosed Trailer
2012 Hustler X-One 60", 26hp, Flex Forks, Mulch Kit
Custom Built Sprayer