Clinical Calorie Calculator

A calorie calculator answers a simple question: roughly how many calories should you eat in a day? The figure it gives is built around your total daily energy expenditure — the calories your body uses through resting metabolism, movement and digestion combined — and then nudged toward your goal. Eat around that maintenance figure and your weight tends to hold steady; eat consistently below it and weight moves down over time; eat above it and weight moves up. The calculator simply turns your basic details into those numbers so you have a sensible place to start.

It is worth being clear about what the result is not. It is an estimate for a typical body, not a prescription, and it describes energy balance rather than the quality of a diet. Two people on the same calorie total can eat very differently; the number here is the budget, not the plan for how to spend it.

Clinarix starts with the Mifflin–St Jeor equation to estimate your basal metabolic rate — 10 × weight in kilograms, plus 6.25 × height in centimetres, minus 5 × age, plus 5 for men or minus 161 for women. That resting figure is then multiplied by an activity factor between 1.2 for a sedentary day and 1.9 for a heavy training load, which gives your maintenance energy, or TDEE.

From maintenance, the calculator applies your goal. A weight-loss goal uses roughly an 80% factor — a moderate deficit of about a fifth below maintenance — while a lean-gain goal adds around 12%. A moderately active 32-year-old man at 78 kg and 178 cm, for instance, sits near 2,694 kcal to maintain, about 2,155 in a deficit, and around 3,017 for a surplus. The goal table on the result shows all three side by side so you can see the trade-offs at a glance.

Pick the goal that matches what you are actually trying to do, then treat its number as a starting budget rather than a fixed rule. The most reliable approach is to hold a modest, steady gap from maintenance and let the change accumulate over weeks; large deficits feel impressive at first but are difficult to sustain and easy to rebound from. If progress stalls for a couple of weeks, a small adjustment is usually all that is needed, because your needs shift as your weight and activity change.

Calories are only half the picture, so this tool pairs naturally with the rest of your Clinarix profile. Use it alongside the macro and protein calculators to decide how to fill the budget, and re-check it as your weight moves. Saved to your Wellness Snapshot, your target becomes a trend you can follow rather than a single number to chase.