Calculate your maintenance calories and your deficit properly — then stop guessing.
A workable estimate for most people is bodyweight in pounds times 14 to 16 — the lower end if you're sedentary, the higher end if you're active and training. A 180lb person who lifts four times a week and walks lands somewhere near 2,700 calories to maintain. Every online calculator is doing a version of this arithmetic with more decimal places and no more accuracy.
For fat loss, subtract 15-25%. That's roughly 400-650 calories for the person above, producing a bit under a pound a week. Larger deficits work faster and cost more muscle, more performance and more adherence. Smaller deficits are slower and easier to sustain — which usually wins over a year.
Set protein before anything else, around 0.8-1.0g per pound of goal bodyweight. Then fill remaining calories with carbohydrates and fats in whatever ratio you actually enjoy and can sustain. The ratio matters far less than the protein floor and the total.
Every estimate has meaningful error, and your actual expenditure changes with activity, sleep and time in a deficit. The number is a hypothesis. What you do with it is the experiment: track bodyweight as a weekly average for two to three weeks, and adjust by 100-200 calories based on what the trend actually did.
Underreporting is well documented and mostly unintentional — cooking oil, sauces, bites while cooking, weekend meals estimated generously. If the math says you should be losing and you aren't, the likeliest explanation isn't a broken metabolism; it's a few hundred untracked calories a day.
If an old injury is the reason your training isn't consistent enough for any of this to matter, REBUILD handles that side.
Don't diet indefinitely. Run a fat-loss phase for eight to sixteen weeks, then eat at maintenance deliberately for several weeks before deciding whether to continue. People who plan the exit keep the results; people who diet until they crack usually don't.
Roughly 15-25% below maintenance for most people. Bigger isn't better beyond that.
Usually intake creep or water retention. Check a two-week average before changing anything.
No. Most people count long enough to learn portion sizes, then rely on habits and periodic check-ins.
Your schedule, your appetite, your training history, your injuries — applied instead of explained.
One email a week: what actually works in training and nutrition, minus the hype.