How Many Calories Do I Actually Need Each Day? (The Honest Answer)

It's one of the most Googled health questions there is: "how many calories should I eat per day?" And the frustrating thing is, most answers either throw a generic number at you or bury the real answer in so much jargon that you give up halfway through.

So here's the honest answer: there's no single number that works for everyone. But there is a number that's right for you specifically — and it's not that hard to figure out.

Your Metabolism Is Not the Same as Mine

A 5'2" woman who works a desk job and is 45 years old has completely different calorie needs than a 6'1" man who does construction and is 28. Using the same "eat 2,000 calories" advice for both of them is genuinely useless.

What actually matters is your BMR (Basal Metabolic Rate) — the calories your body burns just to exist. Then you multiply that by how active you are to get your TDEE (Total Daily Energy Expenditure) — what you actually burn in a day.

How BMR Is Calculated

The most accurate formula for most people is Mifflin-St Jeor:

• Men: BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age) + 5
• Women: BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age) − 161

A 30-year-old woman who is 165cm and weighs 65kg gets: BMR = 650 + 1,031 − 150 − 161 = 1,370 calories. That's just to lie in bed and exist.

Your Activity Level Changes Everything

Take that same woman and multiply her BMR based on what she actually does:

• Mostly sedentary (desk job, no exercise): 1,370 × 1.2 = 1,644 calories/day
• Moderately active (3-4 workouts/week): 1,370 × 1.55 = 2,124 calories/day
• Very active (daily intense workouts): 1,370 × 1.725 = 2,363 calories/day

These are your maintenance calories — what you eat to stay exactly the same weight.

Adjusting for Your Goal

Want to lose weight? Eat 300-500 calories less than your TDEE. That creates a weekly deficit of 2,100-3,500 calories, which translates to roughly 0.5-1 pound lost per week. Slow? Sure. But sustainable — which matters far more.

Want to build muscle? Eat 200-300 above TDEE and make sure you're strength training. Too large a surplus just adds fat.

Never go below 1,200 calories if you're a woman, or 1,500 if you're a man. Below these levels, you risk nutrient deficiencies and your body starts breaking down muscle for fuel.

Find Your Number

Skip the guesswork. Use our calorie calculator — enter your details and choose your goal, and you'll get a specific daily calorie target based on your actual stats.