This free omega 3 requirement calculator shows how much omega-3 you need: your recommended daily ALA by age and sex, plus general EPA and DHA guidance — the omega-3s found in oily fish.
“Requirement” here is the Adequate Intake for ALA (the plant omega-3). EPA and DHA are the omega-3s from fish — general guidance is shown alongside.
General guidance for healthy people. Get omega-3s from oily fish, walnuts, flaxseed, chia and canola oil. High-dose fish-oil supplements can affect bleeding and aren’t right for everyone — ask a doctor first.
How the Omega-3 Requirement Calculator Works
This tool shows the general Adequate Intake (AI) of ALA — the plant-based omega-3 — for your age or life stage and sex, alongside general guidance for EPA and DHA, the omega-3s found in oily fish. It’s an educational reference, not a personalized prescription.
Formula: ALA Adequate Intake (g/day) = reference value for your selected Age / life stage group, using the female column when Female is selected (the Pregnant and Breastfeeding groups use one fixed value regardless of the sex toggle). EPA + DHA guidance is shown separately as a general milligram-per-day range for that same group, not a calculated number.
- Age / life stage — the bracket you select: child (1-3, 4-8, or 9-13 years), teen (14-18 years), adult (19+ years), pregnant, or breastfeeding.
- Sex — male or female, used to pick the correct ALA value from age 9 onward (hidden for the pregnant and breastfeeding groups, which share one value).
Example Scenarios
| Age / Life Stage | Sex | ALA Adequate Intake (g/day) |
|---|---|---|
| Child (1-3 years) | N/A | 0.7 g |
| Child (9-13 years) | Male | 1.2 g |
| Child (9-13 years) | Female | 1.0 g |
| Teen (14-18 years) | Female | 1.1 g |
| Adult (19+ years) | Male | 1.6 g |
| Pregnant | — | 1.4 g |
Using the Omega 3 Requirement Calculator Alongside Your Diet
An omega 3 requirement calculator gives a daily target, and the next step is seeing how your meals compare.
- ALA comes from plant foods such as flaxseed, chia seeds, walnuts, and canola and soybean oils.
- EPA and DHA come mainly from oily fish like salmon, sardines and mackerel, or from algae-based supplements.
- The body converts only a small share of ALA into EPA and DHA, so plant sources do not fully replace fish.
Check supplement labels for the actual EPA and DHA per capsule, not the total fish oil amount, as the two are often very different. Compare that with the omega 3 requirement calculator guidance rather than assuming more is better.
Pregnancy and breastfeeding raise ALA needs slightly, which the omega 3 requirement calculator reflects. Talk to a doctor or pharmacist before taking fish oil if you use blood thinners, are pregnant or have surgery coming up; the omega 3 requirement calculator is general reference, not treatment advice. The NIH Office of Dietary Supplements omega-3 fact sheet explains the evidence behind each figure in the omega 3 requirement calculator.
Omega-3 Requirement Calculator FAQ
What’s the difference between ALA and EPA/DHA omega-3s?
ALA is the plant-based omega-3 found in foods like flaxseed, walnuts and canola oil, and it has an official Adequate Intake in grams per day. EPA and DHA are the omega-3s found mainly in oily fish; general health guidance for these is usually given as a milligram range rather than a strict requirement.How much EPA + DHA should adults aim for?
General guidance suggests around 250-500 mg of combined EPA + DHA daily for adults, often met by eating oily fish such as salmon or sardines a couple of times a week. This is a general wellness range, not an individualized prescription.Do pregnant or breastfeeding women need more omega-3?
DHA is considered especially important in pregnancy and breastfeeding for the baby’s development. Oily fish is a good source — choosing lower-mercury options is sensible, and any supplement use should be discussed with a doctor first.What foods give me ALA versus EPA and DHA?
ALA comes from plant sources like flaxseed, chia, walnuts and canola oil. EPA and DHA come mainly from oily fish such as salmon, mackerel and sardines, though some algae-based supplements also provide EPA/DHA for those who don’t eat fish.Is this a medical dosage recommendation?
No. This calculator provides general educational reference information based on typical published intake guidance, not a diagnosis or a personalized medical directive. Anyone considering high-dose fish-oil supplements should check with a doctor first, since these can affect bleeding.Why does the calculator show a range instead of one exact EPA + DHA number?
Unlike ALA, there’s no single official Adequate Intake figure for EPA + DHA in most reference frameworks — general health guidance is typically expressed as a range, which is why the calculator shows an approximate milligram range rather than one fixed value.Related Calculators
Building a fuller picture of your nutrient intake can help — pair this with the fiber intake calculator, check your vitamin D intake reference, or, if you’re expecting or nursing, see the breastfeeding calorie calculator for related guidance.