Iron Intake Calculator
Shows the recommended daily iron intake in milligrams from a fixed sex-and-age lookup, for example 18 mg for women aged 19 to 50 and 8 mg for adult men.
What this calculator does
The Iron Intake Calculator estimates your result instantly from the values you enter, using standard health & fitness formulas. Shows the recommended daily iron intake in milligrams from a fixed sex-and-age lookup, for example 18 mg for women aged 19 to 50 and 8 mg for adult men. Calculations run in your browser, so nothing you type is sent to a server, and the output is an estimate rather than a certified or official figure.
Result
About Iron Intake Calculator
The Iron Intake Calculator returns a recommended daily iron figure in milligrams from a fixed lookup by sex and age band.
For males it uses 8 mg, except 11 mg for ages 14 to 18. For females it uses 8 mg up to 13, 15 mg for 14 to 18, 18 mg for 19 to 50, and 8 mg above 50.
Formula & Mathematical Calculation
Daily Iron (mg) = f(Sex, Age (years))
Calculated according to standard health formulas implemented in the calculator core.
Calculation Example
For a female aged 30, the lookup falls in the 19 to 50 band, which the tool sets to 18 mg.
It reports a Daily Iron value of 18 mg per day.
Key Benefits
- Gives a daily iron target from just sex and age
- Uses fixed age-band values you can see
- Returns an instant single-number result
- Covers both male and female bands
How to Use this Calculator
-
Select sex
Choose Male or Female. -
Enter age
Type your age in years so the correct band is used. -
Calculate
Select Calculate to see the recommended daily iron in mg.
Assumptions & Limitations
What the calculation assumes
- Every value you enter is treated as an exact, known amount.
- Any rate or interval you enter is assumed to hold for the whole period unless the form asks for it separately.
- Results use standard published formulas and account only for the values entered above.
- Rounding is applied for display; the underlying calculation uses your full precision.
- Results are returned in the same units you enter, unless the tool states the output unit.
What it does not cover
- Iron Intake Calculator produces a calculated result for reference and learning, not a certified or official measurement.
- Real-world outcomes differ when tolerances, rounding rules or local standards apply.
- Definitions and standards vary by region and change over time; verify the convention that applies to your case.
- Figures are only as accurate as the inputs you supply — check them before acting on the result.
- For work where the result carries real consequences, confirm it against an authoritative source.
Frequently Asked Questions
Free to use, no account needed. Calculations run in your browser, so nothing you type is sent to a server. Results are estimates — how we build and check our calculators.