How Many Calories Should I Eat to Lose Weight? A Simple Way to Find Out

A common general starting point is eating roughly 500 fewer calories per day than your maintenance level — the number of calories your body burns to stay at your current weight. That’s a rough guideline, not a personalized target, and the number that actually works for you depends on factors a generic formula can’t see.

Trackbie does not provide medical advice. This is general information, not a personalized recommendation — consult a healthcare professional before making significant changes to your diet.

Why “500 Fewer Calories” Is Only a Starting Point

The 500-calorie figure comes from a rough rule of thumb that a deficit of about 3,500 calories over time corresponds to roughly a pound of weight change. It’s a reasonable starting estimate, but your actual maintenance calories depend on your body composition, activity level, and metabolism — none of which a generic calculator sees directly. Two people of the same height and weight can have meaningfully different real maintenance levels.

A Better Starting Point Than a Formula

Instead of estimating your maintenance calories from a generic formula and guessing at a deficit, a more reliable approach is looking at what you’re actually eating now and adjusting from there. This is the idea behind Plan My Day: Trackbie looks at your last 7 days of real eating, not a generic estimate, and builds a macro target from that — a starting point grounded in your actual habits rather than a population-average formula.

Signs Your Deficit Might Be Too Aggressive

A deficit that’s too large tends to show up as constant hunger, low energy, or difficulty sticking with it for more than a week or two. If that’s happening, a smaller, more sustainable deficit — even if it means slower progress — is usually more effective long-term than a deficit you can’t maintain.

When to Talk to a Professional

If you have a specific medical condition, are pregnant or breastfeeding, or weight loss isn’t happening despite a consistent deficit, that’s a sign to talk to a doctor or registered dietitian rather than adjust the number further on your own.

Turning That Number Into a Calorie Counter You’ll Actually Use

Knowing your rough target is only useful if you can see how close you’re actually getting to it, which is why the next question people usually ask is what calorie counter to lose weight with. A calorie counter calculator to lose weight can hand you a number, but a calorie counting app for weight loss has to hold up daily, for weeks, or the number stops mattering. That’s a different, harder bar than a one-time calculation.

Most food tracking apps for weight loss ask you to search a database and log every item by hand, which works until the day you’re too busy or too tired to bother — and that’s usually the day the whole thing falls apart. A calorie tracker to lose weight that actually sticks tends to be the one that asks the least of you on your worst days, not your best ones. Trackbie’s approach is to share a meal by photo, voice, or text and get the estimate instantly, without a search step, specifically because that lower-effort version is the one people keep using past the first week.

Among best nutrition apps for weight loss more broadly, the ones that hold up long-term tend to do more than count — they use the count for something. A meal plan generator for weight loss built from your own real data, like Plan My Day, takes the same eating pattern a lose weight calorie tracker collects and turns it into tomorrow’s plan automatically, rather than leaving you to recalculate a target every time your weight or habits shift.

If you’re looking for a free calorie counter for weight loss specifically, that’s worth being direct about: Trackbie’s calorie counting, macro breakdown, and Plan My Day are all included at no cost — there’s no premium tier gating the parts that actually help you hit the number this article walks through. Whether you end up calling it the best weight loss calorie app or just the one you kept using, the honest test is the same: does it still fit into your day three weeks in, not just on day one.

It’s worth separating two things that get conflated in most “best calorie counter” searches: how accurately an app estimates a meal, and how little friction it takes to keep using it every day. A calorie counter and weight loss tracker can be perfectly accurate and still fail you if logging feels like a chore by day ten — which is the more common reason weight-loss tracking stalls out than the app being wrong about any single meal. That’s the practical argument for a lower-effort entry point, whether that’s Trackbie’s photo-and-voice approach or another app’s version of the same idea.

The number this article opened with — roughly 500 fewer calories than maintenance, adjusted from there — only stays useful if you can actually see whether you’re hitting it most days, not perfectly, but consistently. A calorie counter to lose weight that you abandon after two weeks is worth less than a less-precise one you actually keep using, which is the real argument for picking based on how the app fits your daily routine, not just its feature list.