How do I calculate my calorie needs?

Your calorie needs are calculated in two steps: First, your Basal Metabolic Rate (BMR) is determined — the calories your body burns at rest. Then, this is multiplied by an activity factor (PAL) to get your Total Daily Energy Expenditure (TDEE). Our calculator uses the Mifflin-St Jeor formula by default and optionally the Katch-McArdle formula if you know your body fat percentage.

What is the difference between BMR and TDEE?

BMR (Basal Metabolic Rate) is the energy your body needs at complete rest to maintain vital functions like breathing, heartbeat, and cell regeneration. TDEE (Total Daily Energy Expenditure) additionally includes calories burned through movement, exercise, digestion (thermic effect of food), and general activity. For dieting or meal planning, TDEE is the relevant metric.

How many calories do I need to lose weight?

To lose weight, you need to consume fewer calories than your TDEE. A moderate deficit of 500 kcal per day leads to weight loss of about 0.5 kg per week. We recommend never going below your BMR and keeping the deficit between 300-750 kcal daily to lose weight sustainably without muscle loss.

What is the Mifflin-St Jeor formula?

The Mifflin-St Jeor formula is the most commonly recommended equation for calculating BMR today. Developed in 1990, it is considered the most accurate formula for most people. For men: BMR = 10 x weight(kg) + 6.25 x height(cm) - 5 x age(years) + 5. For women: same formula but -161 instead of +5. It accounts for gender, weight, height, and age.

How accurate is a calorie calculator?

Calorie calculators provide a good estimate with approximately 80-90% accuracy for most people. The Mifflin-St Jeor formula has an average deviation of about 10% from actual BMR. Factors like genetics, hormones, medications, and body composition can influence actual needs. If you enter your body fat percentage, the more accurate Katch-McArdle formula is used.

Should I eat below my BMR?

No, you should never eat below your BMR consistently. BMR only covers vital body functions. Calorie intake below BMR can lead to muscle loss, nutrient deficiency, metabolic slowdown, and hormonal imbalances. Our calculator sets a floor of 1,200 kcal. A moderate deficit below TDEE but above BMR is the safe approach.

How much protein do I need per day?

We recommend 1.8 g protein per kilogram of body weight per day. For muscle building (goal: gain weight), we increase the recommendation to 2.0 g/kg. Protein is crucial for muscle maintenance, satiety, and the thermic effect of food. At 75 kg body weight, that means 135 g protein daily — about 540 kcal from protein alone.

How often should I recalculate my calorie needs?

You should recalculate every 4-6 weeks, especially if your weight has changed by more than 2-3 kg, you've changed your training program, or you've hit a plateau. As body weight decreases, your BMR also decreases, so you need fewer calories than at the start of your diet.

Are 1,200 calories per day enough?

1,200 kcal per day is the absolute minimum and only suitable for very small, light, and inactive individuals. For most people, this intake is too low and can lead to nutrient deficiencies. Women should consume at least 1,400-1,600 kcal and men at least 1,600-1,800 kcal daily. Our calculator considers your individual measurements and never sets an extreme deficit.

How does exercise affect my calorie needs?

Exercise significantly increases your TDEE. Depending on activity level, your BMR is multiplied by a PAL factor: Sedentary (1.2), Lightly active (1.375), Moderately active (1.55), Very active (1.725), Extremely active (1.9). Additionally, our calculator accounts for daily steps: above 7,000 steps, you get a bonus of 0.04 kcal per extra step. This accurately captures everyday movement too.

10,000 Steps a Day: How Many Calories You Actually Burn | Calorie Calculator

10,000 Steps a Day: How Many Calories You Actually Burn

The 10,000-step rule is ubiquitous. But does it hold up? And how many calories do you actually burn per step? In this article, we do the math and show you at what step count calorie expenditure truly becomes significant.

Where Does the 10,000-Step Rule Come From?

Surprisingly, the 10,000-step recommendation has no scientific origin. It originated in 1965 in Japan as a marketing campaign for the pedometer Manpo-kei -- the name literally means 10,000-step meter. Since then, the number has become established as a pedagogical goal. Current studies show, however, that significant health benefits begin at 7,000-8,000 steps per day.

Calories Burned per Step

Calories burned per step depend on several factors: body weight, walking speed, terrain, and fitness. As a rule of thumb: **An average adult burns about 0.03-0.06 kcal per step.** At 75 kg body weight and moderate pace, it is about 0.04 kcal per step.

Calculation Example: 10,000 Steps

At 0.04 kcal per step: 10,000 steps x 0.04 kcal = **400 kcal**. That is roughly equivalent to: a piece of cake, a large coffee with milk and sugar, 100 g of chocolate, or a small meal. Over a week, that is 2,800 kcal -- enough for about 0.36 kg of fat loss if calorie intake stays the same.

The Truth About Steps and Weight Loss

Steps alone will not make you slim, but they help enormously. The great advantage of walking over intense exercise: it is sustainable, low-injury, and easily integrated into daily life. Studies show that people who regularly exceed 10,000 steps have significantly lower risk of obesity, cardiovascular disease, and diabetes.

Steps by Body Weight

Calorie expenditure increases with body weight. Here is the estimated burn for 10,000 steps by weight:

- **60 kg:** approx. 300 kcal

- **70 kg:** approx. 350 kcal

- **80 kg:** approx. 400 kcal

- **90 kg:** approx. 450 kcal

- **100 kg:** approx. 500 kcal

How Our Calculator Accounts for Steps

Our calorie calculator uses a step bonus for steps above 7,000 per day: each step above 7,000 is valued at an additional 0.04 kcal. At 10,000 steps, that is a 120 kcal bonus; at 15,000 steps, 320 kcal. Below 7,000 steps, the expenditure is already included in the PAL factor (activity level).

Tips for More Steps in Daily Life

- Take the stairs instead of the elevator (about 0.11 kcal per step going up).

- Get off one stop early and walk the rest.

- Make phone calls while walking instead of sitting.

- Take a 10-minute walk after every meal (about 1,000 steps).

- Use a standing desk and walk around regularly.

Conclusion

10,000 steps is a good daily goal but not a magic threshold. Health benefits begin at 7,000-8,000 steps. Each additional step burns about 0.04 kcal and contributes to your total calorie expenditure. Integrate more walking into your daily routine -- it is the simplest and most sustainable form of exercise.