I heard someone came up with a complex formula for calculating it.......I think everything comes into a play......

there are probably some simple ways out there to estimate, but then some year itll be way off, hence its complicated.....kinda like easter being so early this year.......

just be in the field and when it gets hot, stay there!

I think area to area can vary greatly too, go 2-3miles from your place and the rut may not even be happening, but have a hot doe in your area and watch out......