Calorie Calculator

Almost always, it's because you're eating more calories than you think or burning fewer than estimated — the calculator gives a starting point, not a guarantee. The most common cause is underestimating portions, since cooking oils, sauces, dressings, and drinks add up quickly and a kitchen scale is far more accurate than measuring cups. Many people also overestimate activity, sitting closer to 'sedentary' than they assume. Over weeks of dieting, the body can also adapt by burning slightly less (metabolic adaptation), and normal water-weight swings can mask fat loss on the scale. Try tracking everything carefully for a week, then reduce intake by another 100-200 calories or add movement. If weight stays stuck despite consistent effort, a doctor can rule out medical causes.

Usually no, because your chosen activity level already accounts for exercise. If you selected 'moderately active' or higher on the assumption that you work out, that exercise burn is already built into your TDEE, so eating those calories back would cancel your deficit. The exception is if you selected 'sedentary' and your workouts are genuinely on top of an otherwise inactive day — then you can eat back some, but not all, of the burn. Fitness trackers and gym machines tend to overestimate calories burned, sometimes substantially, so a safe rule is to eat back only about 50% of the estimate. The simplest approach for most people is to pick the activity level that reflects your typical week and leave the target fixed.

As a general guideline, women should not go below about 1,200 calories per day and men below about 1,500 without medical supervision. Below these levels it becomes hard to get enough protein, vitamins, and minerals, and very low intake can lead to muscle loss, fatigue, hair thinning, hormonal disruption, and a slower metabolism — often making weight harder to keep off. If your calculated deficit pushes you under these minimums, the better path is to accept slightly slower weight loss or to widen the gap through more activity rather than deeper restriction. These are population-level floors, not personalized targets: needs differ by body size and health status, and anyone considering a very-low-calorie diet should do so only under a doctor's or dietitian's guidance.

Think in weekly totals rather than daily ones, because your body responds to the average over time, not a single meal. If your daily target is 1,800 calories, that's 12,600 per week; eating around 1,600 on weekdays 'banks' roughly 1,000 calories you can spend on a weekend meal while still hitting your weekly goal. This approach doesn't suit everyone psychologically, since deliberately under-eating can trigger overeating later. A gentler alternative is to simply eat at maintenance on special occasions instead of aiming for a deficit — one day at maintenance won't undo your progress, but frequent large binges will erase the deficit you've built. Consistency across the week matters far more than any single day.

For most people, no — keeping calories consistent every day is simpler to plan and easier to stick to, and it works just as well as cycling. If you do want to vary intake, a common method is to eat slightly more on training days, weighting the extra toward carbohydrates for workout fuel, and slightly less on rest days, while keeping your total weekly calories matched to your goal. The benefit is mainly performance and adherence rather than faster fat loss, since weight change still comes down to the weekly balance. More advanced athletes sometimes find calorie cycling helpful, but beginners generally do best with a single steady daily target until tracking becomes second nature.