You eat well Monday to Friday, lose a pound, then Saturday happens and it's back. It isn't in your head — the two numbers are almost exactly the same size.
Say you're 500 under maintenance each weekday. That's a 2,500 deficit across the week — about two-thirds of a pound of fat.
Now Saturday. Six drinks is around 900. A takeaway is 1,500 to 2,500. Dessert, 400. Against a normal evening that's 2,500 to 3,000 extra in one night.
The Saturday is the same size as the week. You're not failing at a plan — you're running one that balances to zero by design.
Anyone who eats well five days running has plenty of discipline. The problem isn't character; it's a plan with no room in it for a Saturday that was always going to happen.
Plans that require every week to be unusually quiet aren't plans.
Take 300 off Monday through Friday instead. That's a snack, genuinely unnoticeable, and it banks 1,500 before Saturday starts.
The same night now costs you about a thousand net rather than three. You still lose weight that week, you still have the takeaway, and nothing was refused.
If a week won't balance, trim the Saturday rather than starving the week. You can't buy a big night with a punishing Monday to Friday — that's the route to bingeing, and the binge costs more than the restriction saved.
Leeway is a free tool that does this arithmetic for you. Put what's coming up into the week and it spreads the cost across the days around it, with a floor it won't plan below.
Open the planner — freeLeeway is a planning tool, not medical or dietary advice. Calorie figures are typical estimates and vary by brand, measure and recipe. It isn't suitable if you have, or have had, an eating disorder or a disordered relationship with food. If you're unsure what a safe calorie target is for you, speak to a GP or registered dietitian first.