Advice on calories to consume for TDEE -20% and fast days.

Thanks for answering again. My TDEE -20% was 1479 ( desk job with little exercise). So I worked out the weekly calories by multiplying this by 7 which brought me to 10353 calories. I subtracted 1200 calories for my fast days which brought me to 9153 calories. Then I divided this up between the remaining 5 days which meant I should consume 1830 calories on those days. I hope this is a little clearer. Thanks for sticking with me.

Again, as travis said... you are creating a deficit twice. Don't use TDEE - 20%, just use TDEE.

And you're missing the bigger point. 5:2 is maintenance for 5 days, fast for 2 days. Maintenance is ~ 1775 for you. Eat 1775 for 5 days, then fast for 2 days. You're over thinking it.

agree with the overthinking, but she isnt actually doing 5:2, just eating her weekly TDEE -20% calories in the style of 5:2.... i think....

So on the 5 feed days she's actually a bit over TDEE, then way under on the 2 fast days, so weekly cals balance out to TDEE - 20%?

this is making my head hurt....

she worked out a weeks worth of TDEE -20% calories, then of that figure, split it up into 2x 600 calorie days and the rest as 5 normal days.... now i think its double counting again... i didnt before!!!!

First, if you are basing your cals on TDEE, you don't eat back exercise cals (assuming what you calculated was actually TDEE...).