The drive-through menu is engineered for speed: big pictures, combo numbers, and a voice asking if you want to make that a large. It's not a great environment for careful decisions.
You don't need a careful decision. Two or three default choices, picked before you're in line, handle most of it.
Look for one anchor
Most menus have something with a decent amount of protein — a grilled chicken sandwich, a burger, a burrito bowl with beans, or eggs if it's breakfast. Pick one, then add whatever else sounds good.
The calculator's macro split works the same way: total calories first, protein as a floor, fat as a minimum, and carbohydrates as the remainder. A drive-through order doesn't have to reproduce that math, but a protein anchor gets you surprisingly close.
The combo is where it drifts
Upsizing usually adds fries and a sugary drink, and both are easy to finish without noticing. If you want them, fine — just make it a choice instead of a reflex.
Water or unsweetened tea is the easiest swap on the board. It's also the one that doesn't require reading a nutrition chart in the rearview mirror.
Don't try to make it a salad
A fast-food lunch doesn't need to be virtuous. If you're hungry and in a hurry, a plain sandwich and a side of fruit is a perfectly ordinary meal. So is the burger.
What tends to cause trouble isn't one order, it's the pattern combined with everything else that day. Two or three weeks of averages tell that story better than any single receipt.
Keep it boring in a useful way
Find one or two orders you like and stick with them. Familiar choices are repeatable, and repeatable is what makes intake roughly comparable from one week to the next.
A 10–20% deficit is a range, not a target you hit to the calorie at a speaker box. If the overall trend needs a nudge, change one thing by 100–200 calories back home — not the whole order at the window.