Free Calorie Calculator - TDEE & Food Calorie Lookup

A Small shifts in weight, age, or activity level inputs cause TDEE to fluctuate. Our tool recalculates fresh each session. If you entered 150 lbs one day and 151 the next, the result moves about 10–15 calories. That's normal. Don't stress over tiny changes. For weight loss, stick with one number for 2–3 weeks before adjusting. Watch the weekly trend instead.

A Absolutely — but check with your doctor first if you have diabetes, thyroid issues, or an eating disorder history. Our tool gives estimates based on standard formulas, not medical advice. For example, the Mifflin-St Jeor equation we use is 89% accurate for most people, but conditions like PCOS can lower your actual BMR by 100–200 calories. Use it as a starting point, then track your body's real response for two weeks before making adjustments.

A Not directly — our tool calculates your average daily needs, not single-day blowouts. A cheat meal of 1,200 calories doesn't wreck your progress if your weekly average stays on target. Use TDEE as your anchor, then adjust for refeeds by eating at maintenance calories (your exact TDEE) one day per week. This prevents metabolic slowdown while keeping diet adherence high. Track your 7-day total, not each meal.

A Not always — and this is where most people get tripped up. If you set your activity level to "moderately active," your TDEE already includes those workout calories. Eating them back means double-counting. But if you're logging exercise separately and your calorie budget came from a "sedentary" baseline, yes, eat back about half of what you burned. A 400-calorie run gets you 200 extra. Otherwise you risk fatigue and muscle loss. Watch your energy levels for 2 weeks to dial this in.

A Body composition drives the difference. Muscle burns about 6 calories per pound at rest, while fat burns roughly 2. If your friend carries 10 more pounds of muscle, that's 40 extra daily calories before either of you moves. Age matters too, since BMR drops about 1-2% per decade after 30. Our calculator uses the Mifflin-St Jeor formula, which accounts for weight, height, age, and sex, but not body fat percentage. That's why two people with identical stats can get the same number yet have different real-world needs. To tune it, track your weight for two weeks while eating at the calculated maintenance, then adjust by 100-150 calories based on the trend.

A Recalculate every 10 pounds lost or gained, or once per month if you're weight training. Our tool uses your current weight in the Mifflin-St Jeor equation, so a stale number means a stale budget. A 15-pound drop shifts your TDEE by roughly 150 calories. That's the difference between losing and stalling. Set a reminder on your phone to recheck your numbers, and log the result in a notes app. Your body changes, so your calculator input should too.

A Yes, but expect the results to run slightly high. The Mifflin-St Jeor formula we use was developed on adults aged 19 to 78, and it tends to overestimate BMR by about 60–80 calories for people over 65. That's because muscle mass naturally declines with age. To fix this, subtract 10% from your calculated TDEE and test that number for two weeks. If your weight holds steady, you've found your real maintenance. Then adjust for fat loss or gain from there. It's a simple correction that makes the tool accurate for your age.

A No, and thinking otherwise is the biggest myth around calorie calculators. Your body responds to the total number, not the food's reputation. A 300-calorie slice of pizza and a 300-calorie chicken salad move your daily total the same way. That said, 1,500 calories of junk leaves you hungry by 3pm, while the same amount of protein and fiber keeps you full. Use the calculator for your number, then spend it on food that actually satisfies you.

A Your body burns about 8 calories warming a cold glass of ice water to 98.6 degrees. But that tiny boost won't offset a poorly planned meal. Our calculator focuses on major energy expenditures like basal metabolic rate and daily movement. Do not rely on cold water to fix a broken diet. Drink it for hydration instead.

A Our free web tool doesn't feature direct app integrations right now. You'll need to manually check your daily TDEE output here and input it into apps like MyFitnessPal or Apple Health. While it takes an extra thirty seconds each morning, this ensures your targets stay accurate without messy login permissions. Grab your morning coffee, check your numbers, and log them where you track your workouts.