BMR Calculator
Bereken uw basaal metabolisme om te weten hoeveel calorieën uw lichaam in rust verbrandt
What is BMR and why does it matter?
BMR (Basal Metabolic Rate) is the number of calories your body burns at complete rest to maintain vital functions like breathing and circulation. It accounts for 60-75% of your total daily calorie burn. Knowing your BMR helps you calculate accurate calorie targets for weight loss, maintenance, or muscle gain.
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Create Free AccountWat is BMR?
Basaal metabolisme (BMR) is het aantal calorieën dat uw lichaam nodig heeft om de meest basale levensfuncties uit te voeren in volledige rust. Deze functies omvatten ademhaling, bloedcirculatie, celproductie, voedselverwerking en temperatuurregulatie. BMR is doorgaans verantwoordelijk voor 60-75% van uw totale dagelijkse calorieverbruik, waardoor het de basis vormt voor het berekenen van uw totale energiebehoefte.
BMR formules uitgelegd
De meest gebruikte BMR-formules zijn de Mifflin-St Jeor vergelijking en de Harris-Benedict vergelijking. De Mifflin-St Jeor vergelijking (ontwikkeld in 1990) wordt als nauwkeuriger beschouwd voor moderne populaties: BMR = 10 × gewicht(kg) + 6,25 × lengte(cm) - 5 × leeftijd + 5 (mannen) of -161 (vrouwen). De oudere Harris-Benedict vergelijking (1918) heeft de neiging de caloriebehoefte te overschatten, maar wordt nog steeds veel gebruikt in klinische settings.
Factoren die BMR beïnvloeden
Verschillende factoren beïnvloeden uw BMR naast leeftijd, gewicht, lengte en geslacht. Spiermassa verhoogt BMR aanzienlijk omdat spierweefsel meer calorieën verbrandt dan vetweefsel. Hormonen (vooral schildklierhormonen), lichaamstemperatuur, klimaat, stressniveaus en genetica spelen ook een belangrijke rol. Crashdiëten kunnen BMR verlagen doordat uw lichaam zich aanpast om energie te besparen, daarom worden duurzame benaderingen voor gewichtsbeheer aanbevolen.
BMR vs TDEE: Understanding the Difference
BMR is your resting calorie burn — what your body needs just to survive. TDEE adds your daily activity on top of BMR. Think of BMR as your body's idle fuel consumption and TDEE as total fuel including driving. Never eat below your BMR; use TDEE to set your daily calorie target.
Frequently Asked Questions
What is the difference between BMR and TDEE?
BMR (Basal Metabolic Rate) is the calories your body burns at complete rest just to maintain basic functions like breathing and circulation. TDEE (Total Daily Energy Expenditure) includes your BMR plus calories burned through physical activity, digestion, and daily movement. TDEE is always higher than BMR.
Which BMR formula is most accurate?
The Mifflin-St Jeor equation is considered the most accurate BMR formula for most people, as confirmed by the American Dietetic Association. It was developed in 1990 using modern population data and tends to be more reliable than the older Harris-Benedict equation.
Can I eat below my BMR to lose weight faster?
Eating below your BMR is generally not recommended. Your BMR represents the minimum energy your body needs for basic functions. Consuming fewer calories can slow your metabolism, cause muscle loss, and lead to nutritional deficiencies. Aim to eat between your BMR and TDEE for healthy weight loss.
How can I increase my BMR?
The most effective way to increase your BMR is by building muscle mass through strength training, as muscle tissue burns more calories at rest than fat tissue. Staying hydrated, getting adequate sleep, eating enough protein, and avoiding crash diets also help maintain a healthy metabolic rate.
Does BMR change with age?
Yes, BMR typically decreases by about 1-2% per decade after age 20, primarily due to loss of muscle mass and hormonal changes. Regular strength training and maintaining muscle mass can help counteract this age-related decline in metabolic rate.