To calculate your Daily Energy
needs, simply choose your gender, input
your age in years,
your weight in kilograms, your height
in centimetres, choose your daily activity
level and then press the calculate
button.
Your Daily Energy needs
will then be automatically displayed
in the bottom box in both Kilojoules
and Calories.
For your personal safety's sake,
we strongly suggest that you use
this figure as a guide only and
if planning to reduce your daily
energy intake that you do so in
a slow and controlled manner under
the supervision of a dietitian,
nutritionist or other suitably
qualified professional.
Daily Energy Needs Calculator:
To maintain your current weight you need:
Activity Level Definitions
To assist you in calculating your daily energy needs you'll find definitions of the various Activity Levels:
Activity Level |
Activity Level Definition |
Sedentary |
Little to no exercise |
Lightly Active |
Light exercise (1-3 days per week) |
Moderately Active |
Moderate exercise (3-5 days per week) |
Very Active |
Heavy exercise (6-7 days per week) |
Extra Active |
Very heavy exercise (twice per day, extra heavy workouts) |
The Harris Benedict Equation
The Harris Benedict equation
is a formula that uses the
variables of height, weight,
age, and gender to calculate
a basal metabolic rate (BMR).
This is more accurate than calculating
energy needs based on total
body weight alone.
The only factor
it omits is lean body mass and
thus the ratio of muscle-to-fat
a body has. Remember, leaner
bodies need more energy than
less leaner ones. Therefore,
this equation will be very accurate
in all but the very muscular
(Harris-Benedict will under-estimate
energy needs) and the very fat
(Harris-Benedict will over-estimate
energy needs).