Calculator
What the Iron Intake Calculator does
Iron Intake Calculator: calculates Status, % of Daily Target and Your Intake from Iron Intake and Daily Target. Example: iron intake 14 mg and daily target 18 mg gives status Below target.
Enter Iron Intake and Daily Target and the Iron Intake Calculator reports Status, % of Daily Target and Your Intake. You can nudge a single number and watch the effect straight away.
Most people who open the Iron Intake Calculator are people tracking a goal. Context matters more than the number itself. Age, build and activity all shift it.
No sign-up, no data collection, no processing queue, just code running locally.
The meaning of each field, the formula in use, and a worked example that starts from the default inputs are all further down.
What do the Iron Intake Calculator fields mean?
The Iron Intake Calculator uses 2 inputs. You do not have to fill everything in before seeing an answer; the starting values already produce one.
| Field | What to enter | Default |
|---|---|---|
| Iron Intake | measured in mg; accepts 0 to 360 | 14 |
| Daily Target | measured in mg; accepts 0.1 to 360 | 18 |
How does the Iron Intake Calculator work?
Each output is derived from the inputs above in a single pass; there is no hidden state carried between runs, so the same inputs always give the same calculation.
Nothing is computed until the inputs pass their checks, so you will not get a confident answer built on a typo.
Worked example
These are the values the Iron Intake Calculator loads by default, and the result it produces from them. This is the worked example the page starts from, reproduced here so you can check the arithmetic.
| Iron Intake | 14 mg |
|---|---|
| Daily Target | 18 mg |
| Status | Below target |
|---|---|
| % of Daily Target | 77.78% |
| Your Intake | 14.0 |
| Gap to Target (+ under / − over) | 4.0 |
| What this means | You are 4.0 mg under your daily iron target. |
How to use it
- Enter Iron Intake in mg (0 to 360).
- Set Daily Target in mg (0.1 to 360).
- Because it recalculates as you type, you can dial a value in rather than guessing and re-running.
- You get Status, % of Daily Target, Your Intake, Gap to Target (+ under / − over) and What this means back.
- Copy Link puts the current inputs in the URL, so bookmarking it brings the same numbers back.
What this tool does not do
- Body composition, ethnicity and age all shift what a "normal" result means.
- These formulas come from population averages and cannot account for your medical history.
- The method is fixed. There is no option to substitute your own formula.
- It validates ranges, not intent. A value can be accepted and still be the wrong one to use.
Frequently asked questions
Enter Iron Intake in mg and Daily Target in mg. Look for the unit beside each label; the result is reported in a stated unit as well.
Iron Intake accepts 0 to 360 mg. Out-of-range entries are refused up front, which is safer than silently clamping them.
With the values loaded when the page opens, status comes out as Below target. The figure is derived from the inputs above, so it updates whenever they do.
Nothing is stored. The page has no back end to send data to, and holds your input only in memory.
No. There is no account, no usage cap and no trial period. The site is funded by advertising rather than by charging for the tools.
The number is exact; its meaning is approximate. Two people with identical results can be in genuinely different situations, which is why this is a screening tool rather than a diagnostic one.