What is the difference between EAR and RDA?

The EAR (Estimated Average Requirement) meets the requirement of 50% of healthy individuals in a life stage and sex group, and is the correct value for assessing the adequacy of group intakes. The RDA (Recommended Dietary Allowance) is calculated as the EAR plus two standard deviations, meets the requirement of 97 to 98% of individuals, and is used as an individual intake goal.

What is an Adequate Intake?

An AI is set when evidence is insufficient to establish an EAR, and therefore an RDA. It's used as an individual goal but carries greater uncertainty, and it doesn't support the EAR cut point method for group assessment. The presence of an AI rather than an RDA signals a weaker evidence base for that nutrient.

What is a Chronic Disease Risk Reduction intake?

The CDRR characterises nutrient intakes expected to reduce the risk of developing chronic disease. It's a relatively recent addition to the DRI framework and serves a different purpose from the Tolerable Upper Intake Level, which identifies the highest continuing daily intake likely to pose no risk of adverse effects.

Are DRIs the same in Canada and the United States?

Yes. The DRIs are jointly developed Canada and the United States have collaborated since the mid 1990s, with the National Academies of Sciences, Engineering, and Medicine overseeing development. They replaced Canada's Recommended Nutrient Intakes and the US Recommended Dietary Allowances with a shared framework.

What is an Estimated Energy Requirement?

The EER is the average dietary energy intake predicted to maintain energy balance in a healthy individual of defined age, sex, weight, height and physical activity level. The equations were derived from doubly labelled water measurements of total energy expenditure and use physical activity coefficients specific to the DRI framework.

Why do DRI calculators give different energy values?

Usually because they're using different equations. Some tools labelled as DRI calculators use Mifflin St Jeor for energy rather than the NASEM EER equations. The result is a valid Mifflin St Jeor estimate but not an EER, and shouldn't be documented as one. Check which equation a tool uses before reconciling a discrepancy.

Do DRI physical activity categories match activity guidelines?

No. Health Canada states explicitly that the DRI physical activity categories don't correspond to physical activity guidelines for health, including the Canadian 24 Hour Movement Guidelines. They exist to calculate energy requirements and are not recommendations aimed at improving health.

What does it mean when a nutrient has no UL?

That insufficient data exist to establish one not that high intakes are safe. The absence of a Tolerable Upper Intake Level reflects a gap in the evidence on adverse effects, and shouldn't be read as a demonstration of safety at any intake level.

Is this calculator free?

Yes. No account, no email, no limits and no supplement advertising, which would be inappropriate on a page publishing tolerable upper intake levels.

DRI Calculator for Healthcare Professionals

Q: When should I use the EAR instead of the RDA?

Use the EAR for assessment particularly the EAR cut point method for estimating the prevalence of inadequate intake in a group. Use the RDA as an individual goal. Assessing group intakes against the RDA substantially overestimates inadequacy, because the RDA is set to cover 97 to 98% of the group and most individuals require less.

Q: Do DRIs apply to patients who are ill?

No, not unmodified. DRIs are designed for apparently healthy individuals and aren't intended for people with acute or chronic illness, malabsorption, or altered requirements from disease or treatment. Condition specific clinical guidance applies in those cases; the DRIs may inform assessment but don't replace it.

Dietary Reference Intake values by life stage and sex EAR, RDA, AI, UL, CDRR and AMDR displayed separately, as they should be, with the source report for each.

Built for practitioners. The values are the same ones Health Canada publishes; what we add is guidance on which value applies to which task, at the point where you're using it.

⚠️ DRIs apply to apparently healthy individuals. They are not designed for people with acute or chronic illness, malabsorption, or altered requirements from disease or treatment.

DRI Healthcare Canada

Gender

Age

Life Stage

Units

Feet

Inches

Weight (lbs)

Physical Activity Level

Estimated Energy Requirement (EER)

2176

Calories / day

Health Canada DRI recommendation for 30-year-old female (standard).

Dietary Reference Intakes (RDA / AI Targets)

Category	Nutrient	Health Canada Target
Macronutrients	Protein (RDA)	51 g / day
	Carbohydrates (RDA)	130 g / day
	Dietary Fiber (AI)	25 g / day
Key Vitamins	Vitamin A	700 mcg RAE
	Vitamin C	75 mg
	Vitamin D	600 IU
	Vitamin B12	2.4 mcg
	Folate (DFE)	400 mcg
Key Minerals	Calcium	1000 mg
	Iron	18 mg
	Magnesium	320 mg
	Potassium	2600 mg
	Sodium (UL)	< 2300 mg

Dietary Reference Intakes (DRIs) established by Health Canada and the Standing Committee on the Scientific Evaluation of Dietary Reference Intakes.

What the DRIs Are

Dietary Reference Intakes are a set of nutrient reference values used to plan and assess the diets of apparently healthy people in Canada and the United States.

They are not a single number per nutrient. Most nutrients have several DRI values, each serving a different purpose. They are jointly developed by Health Canada and the US National Academies of Sciences, Engineering, and Medicine (NASEM).

The Seven DRI Values Defined

Value	Definition	Correct Application
EAR	Meets requirements of 50% of healthy population	Assessing group intake adequacy
RDA	Meets requirements of 97 to 98% of individuals (EAR + 2 SD)	Individual intake goal
AI	Set where evidence is insufficient to establish EAR	Individual goal (higher uncertainty)
UL	Highest daily intake posing no risk of adverse effects	Ceiling (toxicity threshold)
EER	Average dietary energy intake for energy balance	Energy planning
CDRR	Intake expected to reduce chronic disease risk	Chronic disease risk reduction
AMDR	Macronutrient percentage ranges (protein, fat, carbs)	Macronutrient planning

EAR or RDA? Assessment vs Planning

The Fundamental Rule:

Use the EAR to assess the adequacy of group intakes (using the EAR cut point method).

Use the RDA as an individual goal. Assessing group intakes against the RDA substantially overestimates inadequacy because the RDA is set to cover 97 to 98% of the group.

Why Use the CalcVault DRI Calculator

Full 7-Value BreakdownDisplays EAR, RDA, AI, UL, CDRR, EER and AMDR by life stage.

True NASEM EER EquationsUses official NASEM EER equations with physical activity coefficients instead of Mifflin St Jeor.

Health Canada GuidelinesReferences Health Canada's Applying dietary reference intakes framework.

100% Free for ProfessionalsNo email required, no account creation, no supplement advertising.

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Frequently Asked Questions

Sources and Disclaimer

Sources: National Academies of Sciences, Engineering, and Medicine (NASEM DRI reports including 2023 Energy report), Health Canada (Dietary Reference Intakes tables & Applying dietary reference intakes), Institute of Medicine, Dietitians of Canada.

Disclaimer: CalcVault is not a healthcare provider and this tool does not constitute clinical advice. It is intended as a reference aid for healthcare and nutrition professionals.