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  1. Home
  2. Fitness Knowledge
  3. Kalorienrechner

Kalorienrechner

Ermittle in Sekunden deinen Grundumsatz und deinen täglichen Kalorienbedarf – passend zu deinem Ziel: abnehmen, halten oder Muskeln aufbauen.

Gender
Years
cm
kg
Your goal
How we calculate

The basal metabolic rate (BMR) is calculated using the most common formula today, the Mifflin-St Jeor equation:

Men: 10 × kg + 6.25 × cm − 5 × age + 5
Women: 10 × kg + 6.25 × cm − 5 × age − 161

The total daily energy expenditure (TDEE) is calculated by multiplying BMR × activity factor (PAL 1.2 – 1.9). For your goals, we calculate with approx. −20% (lose weight), ±0% (maintain) and +10% (build muscle) relative to the TDEE. These values are estimates and do not replace professional medical advice.

Method
The tape measure method is significantly more accurate – measure with a tape measure.
Gender
J.
cm
kg
cm
cm
cm
only required for women
How we calculate

The US Navy circumference method estimates body fat percentage based on height as well as neck, waist (and for women, hip) circumference. It is a recognized and practical approximation for everyday use.

Without a tape measure, we use the Deurenberg BMI method: Body fat % = 1.20 × BMI + 0.23 × age − 10.8 × gender − 5.4 (Gender: male = 1, female = 0). Both methods provide estimates; for precise values, calipers or DEXA scans are suitable.

cm
kg
J.
How we calculate

The Body Mass Index is weight (kg) divided by height (m) squared: BMI = kg ÷ (m × m)

WHO classification: < 18.5 underweight · 18.5–24.9 normal weight · 25–29.9 overweight · ≥ 30 obesity. The BMI does not distinguish between muscle and fat mass – very muscular individuals are overestimated. For greater accuracy, combine it with the body fat calculator.

Gender
cm
kg
How we calculate

There is no single ideal weight. We show the healthy weight range based on the normal BMI (18.5–24.9) for your height as well as two classic formulas for comparison:

Broca normal weight: height (cm) − 100
Devine ideal weight: 50 (♂) or 45.5 (♀) + 0.9 × (height − 152) kg

A range is more meaningful than a rigid number – body frame and muscle mass play a major role.

kg
kcal
Adopted from the calorie calculator, if available.
Your goal
How we calculate

We calculate protein based on body weight (lose weight 2.0 g/kg, maintain 1.8 g/kg, build muscle 2.0 g/kg) and set fat at approx. 25% of daily calories. The remaining energy comes from carbohydrates.

Caloric values: 1 g protein = 4 kcal, 1 g carbohydrates = 4 kcal, 1 g fat = 9 kcal.

All calculations run directly in your browser. Your inputs are not transmitted to us or stored.

Grundumsatz, Leistungsumsatz und was dazwischen passiert

Dein Körper verbraucht Energie, auch wenn du nichts tust. Herzschlag, Atmung, Körpertemperatur und die Arbeit der Organe machen zusammen den Grundumsatz aus – bei den meisten Erwachsenen sind das 60 bis 70 Prozent des Tagesbedarfs. Alles, was du darüber hinaus bewegst, kommt als Leistungsumsatz obendrauf: der Weg zur Arbeit, Hausarbeit, Sport, sogar Zappeln am Schreibtisch.

Der Rechner arbeitet mit der Mifflin-St-Jeor-Formel und multipliziert das Ergebnis mit deinem Aktivitätsfaktor (PAL). Wer überwiegend sitzt, liegt bei 1,2 bis 1,4. Ein körperlich fordernder Beruf oder tägliches Training schiebt den Wert auf 1,7 bis 1,9. Die häufigste Fehlerquelle ist hier nicht die Formel, sondern die Selbsteinschätzung: Drei Trainingseinheiten pro Woche machen aus einem Bürojob noch keinen 1,8er-Alltag.

Wie groß das Defizit sein darf

Ein Kilogramm Körperfett entspricht rund 7.000 Kilokalorien. Ein tägliches Defizit von 500 kcal ergibt damit etwa ein halbes Kilo pro Woche – ein Tempo, das der Körper mitmacht, ohne dass Muskulatur abgebaut wird. Wer deutlich schneller abnehmen will, verliert überproportional viel Muskelmasse, senkt damit den Grundumsatz und macht sich das Halten des Gewichts schwerer.

Deshalb empfiehlt sich ein Defizit von 15 bis 20 Prozent unter dem Gesamtumsatz statt einer festen Kalorienzahl. Wichtig ist außerdem die Eiweißzufuhr: Sie schützt die Muskulatur, während der Körper Fett abbaut. Ausdauertraining auf einem Laufband oder Ergometer erhöht den Verbrauch spürbar, Krafttraining hält den Grundumsatz oben. Beides zusammen wirkt besser als jede der beiden Maßnahmen allein.

Frequently asked questions

Der Grundumsatz (BMR) ist die Energie, die dein Körper in völliger Ruhe verbraucht. Der Gesamtumsatz (TDEE) ist der Grundumsatz multipliziert mit deinem Aktivitätsfaktor – also dein tatsächlicher Tagesbedarf.

Für eine gesunde Abnahme empfiehlt sich ein moderates Defizit von etwa 15–20 % unter dem Gesamtumsatz. Der Rechner zeigt dir diesen Zielwert direkt an.

Wir verwenden die Mifflin-St-Jeor-Formel, die heute als besonders genau gilt, und multiplizieren mit deinem Aktivitätslevel (PAL 1,2 bis 1,9).

Welches Gerät passt zu dir?

Unsere Gerätevergleiche zeigen die Unterschiede auf einen Blick.

Treadmill for home: T16, T18, T21, T22, T23 or T30 – which one suits you?
Cross trainer C28, C29, E4 or E50 – which one suits you?
Rowing machine RA11, RA20, RA12, RA18 or RA10 – which one suits you?
Exercise bike H12, H21 or H22 – which one suits you?
Speedbike S14, S15, S18, S20 or S11S – which one suits you?
Home gym MG5, MG7 or MG9 – which one suits you?

Additional calculators

Körperfett-Rechner
BMI-Rechner
Idealgewicht-Rechner
Makro-Rechner

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