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Energy Calculator

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Calculator Description

Compare to the calorie calculator, energy calculator will use the Dietary reference intakes (DRI) report from the food and nutrition board, institue of medicine of the national academies. It will use a different formula for different age groups as specificed in the report. You can use the calculated result to plan nutrient intakes for yourself or a group.

Related Link
Fitness ALL BMI Calorie Body Fat BMR Ideal Weight

Energy Requirement

The energy requirement of an individual is a level of energy intake from food that will balance energy expenditure when the individual has a body size and composition, and level of physical activity, consistent with long-term good health; and that would allow for the maintenance of economically necessary and socially desirable physical activity. In children and pregnant or lactating women the energy requirement includes the energy needs associated with the deposition of tissues or the secretion of milk at rates consistent with good health

This definition indicates that desirable energy intakes for obese individuals are less than their current energy expenditure, as weight loss and establishment of a steady state at a lower body weight is desirable for them. In underweight individuals, on the other hand, desirable energy intakes are greater than their current energy expenditure to permit weight gain and maintenance of a higher body weight. Thus, it seems logical to base estimated values for energy intake on the amounts of energy that need to be consumed to maintain energy balance in adult men and women who are maintaining desirable body weights, taking into account the increments in energy expenditure elicited by their habitual level of activity.

The ability to shift from carbohydrate to fat as the main source of energy, coupled with the presence of substantial reserves of body fat, makes it possible to accommodate large variations in macronutrient intake, energy intake, and energy expenditure. The amount of fat stored in an adult of normal weight commonly ranges from 6 to 20 kg. Since one gram of fat provides 9.4 kcal, body fat energy reserves thus range typically from approximately 50,000 to 200,000 kcal, providing a large buffer capacity as well as the ability to provide energy to survive for extended periods (i.e., several months) of severe food deprivation. Large daily deviations from energy balance are thus readily tolerated, and accommodated primarily by gains or losses of body fat

Basal and Resting Metabolism (BMR)

The basal metabolic rate (BMR) describes the rate of energy expenditure that occurs in the postabsorptive state. This standardized metabolic state corresponds to the situation in which food and physical activity have minimal influence on metabolism. The BMR thus reflects the energy needed to sustain the metabolic activities of cells and tissues, plus the energy needed to maintain blood circulation, respiration, and gastrointestinal and renal processing. BMR is commonly extrapolated to 24 hours to be more meaningful, and it is then referred to as basal energy expenditure (BEE), expressed as kcal/24 h

Total Energy Expenditure (TEE)

Total Energy Expenditure (TEE) is the sum of BEE and other energy needed to support daily activities of the body. The use of a measure or estimate of TEE to validate instruments that measure food intake is dependent on the principle of energy balance. That is, in weight-stable adults, energy intake must equal TEE. By comparing reported energy intake to TEE, the accuracy of food intake reporting can be assessed.

Estimated Energy Requirement (EER)

The Estimated Energy Requirement (EER) is defined as the average dietary energy intake that is predicted to maintain energy balance in a healthy adult of a defined age, gender, weight, height, and level of physical activity, consistent with good health. In children and pregnant and lactating women, the EER is taken to include the needs associated with the deposition of tissues or the secretion of milk at rates consistent with good health. While EERs can be estimated for four levels of activity from the equations provided, the active physical activity level is recommended to maintain health.

Formula for EER in different age groups

EER for Ages 0 Through 36 Months

EER = TEE + energy deposition
0–3 months (89 × weight [kg] – 100) + 175 kcal
4–6 months (89 × weight [kg] – 100) + 56 kcal
7–12 months (89 × weight [kg] – 100) + 22 kcal
13–36 months (89 × weight [kg] – 100) + 20 kcal

Human milk is recognized as the optimal milk source for infants throughout at least the first year of life and is recommended as the sole nutritional milk source for infants through the first 4 to 6 months of life (IOM, 1991). Infants receiving human milk for this period would have an energy intake of some 500 kcal/d based on an average volume of milk intake of 0.78 L/d (Heinig et al., 1993; Neville et al., 1988) and an average caloric density of human milk of 650 kcal/L (Anderson et al., 1983; Butte and Calloway, 1981; Butte et al., 1984a; Dewey et al., 1984; Nommsen et al., 1991)

EER for Boys 3 Through 8 years
EER = TEE + energy deposition
EER = 88.5 – (61.9 × age [y]) + PA × (26.7 × weight [kg] + 903 × height [m]) + 20 kcal
Where PA is the physical activity coefficient:
PA = 1.00 if PAL is sedentary
PA = 1.13 if PAL is low active
PA = 1.26 if PAL is active
PA = 1.42 if PAL is very active

EER for Girls 3 Through 8 Years
EER = TEE + energy deposition
EER = 135.3 – (30.8 × age [y]) + PA × (10.0 × weight [kg] + 934 × height [m]) + 20 kcal
Where PA is the physical activity coefficient:
PA = 1.00 if PAL is sedentary
PA = 1.16 if PAL is low active
PA = 1.31 if PAL is active
PA = 1.56 if PAL is very active

EER for Boys 9 Through 18 Years
EER = TEE + energy deposition
EER = 88.5 – (61.9 × age [y]) + PA × (26.7 × weight [kg] + 903 × height [m]) + 25 kcal
Where PA is the physical activity coefficient:
PA = 1.00 if PAL is sedentary
PA = 1.13 if PAL is low active
PA = 1.26 if PAL is active
PA = 1.42 if PAL is very active

EER for Girls 9 Through 18 Years
EER = TEE + energy deposition
EER = 135.3 – (30.8 × age [y]) + PA × (10.0 × weight [kg] + 934 × height [m]) + 25 kcal
Where PA is the physical activity coefficient:
PA = 1.00 if PAL is sedentary
PA = 1.16 if PAL is low active
PA = 1.31 if PAL is active
PA = 1.56 if PAL is very active

EER for Men Ages 19 Years and Older
EER = 662 – (9.53 × age [y]) + PA × (15.91 × weight [kg] + 539.6 × height [m])
Where PA is the physical activity coefficient:
PA = 1.00 if PAL is sedentary
PA = 1.11 if PAL is low active
PA = 1.25 if PAL is active
PA = 1.48 if PAL is very active

EER for Women Ages 19 Years and Older
EER = 354 – (6.91 × age [y]) + PA × (9.36 × weight [kg] + 726 × height [m])
Where PA is the physical activity coefficient:
PA = 1.00 if PAL is sedentary
PA = 1.12 if PAL is low active
PA = 1.27 if PAL is active
PA = 1.45 if PAL is very active

EER for Pregnancy
EER(pregnant) = adolescent EER(nonpregnant) + additional energy expended during pregnancy + energy deposition
1st trimester = adolescent EER + 0 + 0
2nd trimester = adolescent EER + 160 kcal (8 kcal/wk × 20 wk) + 180 kcal
3rd trimester = adolescent EER + 272 kcal (8 kcal/wk × 24 wk) + 180 kcal

EER for Lactation
EER(lactation) = adolescent EER(prepregnancy) + milk energy output – weight loss
1st 6 mo adolescent EER + 500 – 170
2nd 6 mo adolescent EER + 400 – 0

Weight Maintenance TEE in Overweight or Obese
Weight Maintenance TEE in Overweight Boys Ages 3 Through 18 Years
TEE = 114 – (50.9 × age [y]) + PA × (19.5 × weight [kg] + 1161.4 × height [m])
Where PA is the physical activity coefficient:
PA = 1.00 if PAL is sedentary
PA = 1.12 if PAL is low active
PA = 1.24 if PAL is active
PA = 1.45 if PAL is very active

Weight Maintenance TEE in Overweight Girls Ages 3 Through 18 Years
TEE = 389 – (41.2 × age [y]) + PA × (15.0 × weight [kg] + 701.6 × height [m])
Where PA is the physical activity coefficient:
PA = 1.00 if PAL is sedentary
PA = 1.18 if PAL is low active
PA = 1.35 if PAL is active
PA = 1.60 if PAL is very active

Overweight and Obese Men Ages 19 Years and Older
TEE = 1086 – (10.1 × age [y]) + PA × (13.7 × weight [kg] + 416 × height [m])
Where PA is the physical activity coefficient:
PA = 1.00 if PAL is sedentary
PA = 1.12 if PAL is low active
PA = 1.29 if PAL is active
PA = 1.59 if PAL is very active

Overweight and Obese Women Ages 19 Years and Older
TEE = 448 – (7.95 × age [y]) + PA × (11.4 × weight [kg] + 619 × height [m])
Where PA is the physical activity coefficient:
PA = 1.00 if PAL is sedentary
PA = 1.16 if PAL is low active
PA = 1.27 if PAL is active
PA = 1.44 if PAL is very active

Estimated Standard Deviation of EER

The ESD of EER is used to calculate the range of daily intaking energy. The range is calculated by minus or plus 2 times of ESD. The following table gives the ESD for different age groups:
Age (y)BMIMalesFemales
3–18 percentile in [0th, 3rd) 67 70
3–18 percentile in [3rd, 85th) 58 68
3–18 percentile in [85th, 100th] 69 75
19 and over [0, 18.5) 202 160
19 and over [18.5, 25] 199 162
19 and over (25, max] 208 160