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Energy metabolism · Harris–Benedict

Metabolic age from your metabolism — no lab tests

Metabolic age shows how efficiently your metabolism works compared with the average values for different age groups. Just three parameters are enough — sex, height and weight: from them we compute your basal metabolism, and from that — the age your metabolism is “worth”. It's part of your biological age, and you can influence it. If you'd like to factor in sleep, movement and stress, there's an extended lifestyle-based calculation.

3parameters 0lab tests ~1 minto calculate ±3years is normal
A glowing figure with an energy outline of the metabolism — a metabolic-age estimate
3
parameters instead of lab tests: sex, height and weight
BMR
basal metabolism — the basis for the metabolic-age calculation
0.95–1.05
the normal corridor for the metabolic-age pace
2
formulas by sex:
male and female models
Method

How metabolic age is calculated

At its core is basal metabolism: the energy the body spends at rest. It's estimated with the Harris–Benedict equation and then compared with metabolism at an ideal body weight. The further your weight is from the ideal — which body mass index also shows — the more your metabolic age deviates from your chronological age.

  1. 01
    straighten
    Three parameters
    Sex, height and weight — no lab tests or devices. Age is needed as a reference point.
  2. 02
    local_fire_department
    Basal metabolism
    Using the Harris–Benedict formula we calculate how much energy the body spends at rest (kcal/day).
  3. 03
    balance
    Comparison with the ideal
    Your metabolism is compared with metabolism at an ideal body weight for your height.
  4. 04
    speed
    Age and pace
    We get your metabolic age and pace: whether your metabolism runs ahead of your chronological age or lags behind.

Metabolic age calculator

Fill in sex, age, height and weight. The “Lifestyle” block is optional — it doesn't affect the number, but it makes the recommendations more precise. Weigh yourself under the same conditions, ideally in the morning on an empty stomach, without shoes.

1 Demographics
Name optional
Sex
Chronological age 18–100
years
2 Body measurements
Height 120–230
cm
Weight 30–300
kg
info
Measure height without shoes, standing straight. Weight — on the same scale, ideally in the morning, on an empty stomach and after using the bathroom. That keeps the result comparable from day to day.
3 What speeds up metabolism optional · for recommendations
local_fire_department
These answers do not affect the number itself. They help us suggest exactly how to speed up your metabolism for your lifestyle — the main levers here are muscles, movement, protein and sleep.
Physical activity
Strength training muscle = the main “engine” of metabolism
Nutrition and protein
Sleep quality
Bad habits
Metabolic age
The age your metabolism is “worth”
younger than age normal older than age
local_fire_department
Basal metabolism (BMR)
—kcal / day
That's how much energy the body spends at complete rest — on breathing, the heart and cell renewal.
Path to your ideal weight
Now
— kg
— years
arrow_forward —
Ideal weight
— kg
— years
lightbulb
How to speed up your metabolism: personal recommendations
Below are evidence-based steps for your profile: weight relative to the ideal and your lifestyle answers. This is educational information, not a substitute for a doctor's consultation.
straighten More precise · by body composition Estimated biological age — from waist and hip circumferences Metabolic age looks at energy metabolism. To gauge the contribution of visceral fat and body composition, add your waist and hip circumferences — the Gorelkin–Pinkhasov method gives an estimated biological age and pace of aging. Open calculator
info
Metabolic age is an approximate estimate based on basal metabolism, not a clinical diagnosis. A calculation from height and weight doesn't account for body composition (for example, high muscle mass in athletes “lengthens” the age unfairly). If there's a significant deviation from normal, discuss the result with a nutrition or preventive-medicine specialist.
For information only — not medical advice; consult a qualified healthcare provider before making any health decision. The values you enter are used only to calculate your result and are not stored on our servers.

Related materials

Metabolic Age (Lifestyle)
Calculator
Metabolic Age (Lifestyle)
An extended calculation: BMR, TDEE, body composition, and lifestyle-based metabolic age — no labs needed
Biological Age Estimate
Estimate
Biological Age Estimate
A quick estimate from height, weight, and body measurements — no labs needed
Body Mass Index (BMI)
Calculator
Body Mass Index (BMI)
BMI and BMI Prime, WHO norms, waist-based risk, and the link to biological age

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