Calculator
What the BSA Dosage Calculator does
BSA Dosage Calculator: calculates Total Dose (mg) and Important from BSA and Dose per m². Formula: Age = the difference between two dates in whole years, then remaining months, then remaining days. Example: BSA 1.7 m² and dose per m² 100 mg/m² gives total dose (mg) 170.0.
The inputs are BSA and Dose per m²; the output is Total Dose (mg) and Important. Change any input and the output follows immediately.
Population formulas give you a starting point, not a verdict about your body. That is usually what brings anyone curious about a reading here.
Because it is all local, the tool is as fast as your device and as private as your own notes.
The field reference, the method and a worked example using the default inputs follow the tool itself.
What do the BSA Dosage Calculator fields mean?
The BSA Dosage Calculator uses 2 inputs. Because the form arrives filled, the first useful result costs you zero typing.
| Field | What to enter | Default |
|---|---|---|
| BSA | measured in m²; accepts 0.2 to 3 | 1.7 |
| Dose per m² | measured in mg/m²; accepts 0.1 to 10000 | 100 |
How does the BSA Dosage Calculator work?
Month lengths vary, so this is computed calendar-wise rather than by dividing total days by 365.
An empty or malformed field stops the calculation rather than being treated as zero.
Worked example
These are the values the BSA Dosage Calculator loads by default, and the result it produces from them. Open the tool above and you will find precisely these figures already in place.
| BSA | 1.7 m² |
|---|---|
| Dose per m² | 100 mg/m² |
| Total Dose (mg) | 170.0 |
|---|---|
| Important | Estimated total dose = 170.0 mg. For educational use only, never self-dose. |
How to use it
- Key in BSA in m² (0.2 to 3).
- Fill in Dose per m² in mg/m² (0.1 to 10000).
- There is nothing to click. The answer keeps pace with your edits.
- Read Total Dose (mg) and Important in the results panel.
- Use Copy Link if you want the same setup again later, or Print for a paper copy.
What this tool does not do
- Body composition, ethnicity and age all shift what a "normal" result means for an individual.
- Population-level formulas cannot account for medical conditions, medication or pregnancy.
- Treat it as a fast first pass, not as the final word on a decision that matters.
- A plausible-looking answer from the wrong input is still the wrong answer: verify the fields first.
Frequently asked questions
Enter BSA in m² and Dose per m² in mg/m². Each field states its unit next to the input, and outputs are labelled the same way.
BSA accepts 0.2 to 3 m². The range is enforced before the calculation runs, so a bad entry never reaches the formula.
With the values loaded when the page opens, total dose (mg) comes out as 170.0. Nudge one field at a time to see which one the answer is most sensitive to.
No. Disconnect from the internet and it still works; that is the simplest proof there is no server call.
Free for any use, personal or commercial.
It reports what the standard equation gives. Clinicians treat that output as one input among many, alongside history, examination and labs, and so should you.