How to use the pregnancy mifflin st jeor bmr calculator
Prepare the values for this calculation
Calculate a nonpregnant Mifflin–St Jeor BMR reference value from current inputs; it is not a pregnancy-specific requirement equation. Use the formula below to check that it answers your question. Read the input units before transferring figures from a statement, measurement or dataset.
Enter and check each input
- Age (years): enter a value at least 18 and no more than 60. Use the unit named in the label or selected above. Do not leave this required field blank.
- Weight (kg): enter a value at least 20 and no more than 250. Use the unit named in the label or selected above. Do not leave this required field blank.
- Height (cm): enter a value at least 100 and no more than 220. Use the unit named in the label or selected above. Do not leave this required field blank.
The input table gives a complete example. Keep units and time periods consistent across related fields.
Calculate and resolve any input error
Choose Calculate after entering the values. Changes also update the answer after a short pause. If an error appears, follow its message, correct the field and calculate again. Reset restores the example values.
Interpret the answer
Check Reference BMR first. With the unchanged example inputs, it is 1,420 kcal/day. Interpret it using the formula and assumptions on this page.
Compare and keep a useful result
For a controlled comparison, keep every other example input unchanged and change Age (years) from 30 to 33. The resulting Reference BMR is 1,405 kcal/day. This illustrates the equation’s response to that input, rather than a forecast of real events.
Read the chart’s axis labels and data table. A scenario curve changes one stated input while holding the others fixed; it does not add external observations. Use Download graph to save an available chart as a PNG.
Use Copy result or Download CSV to keep the answer. Share tool shares the page address without placing your input values in the URL. Recheck inputs and assumptions before using the result for a decision.
Pregnancy Mifflin St Jeor BMR Calculator formula
Mifflin–St Jeor female reference: BMR=10W+6.25H−5A−161.
Inputs and units
| Input | Format / range | Example |
|---|---|---|
| Age (years) | minimum 18; maximum 60 | 30 |
| Weight (kg) | minimum 20; maximum 250 | 70 |
| Height (cm) | minimum 100; maximum 220 | 165 |
Worked example
Using the example inputs above, the reference bmr is 1,420 kcal/day.
- Reference BMR
- 1,420 kcal/day
Results and assumptions
This is a nonpregnant adult reference equation, not a pregnancy-specific energy requirement.
Fix an input or unexpected result
Age (years) is required. Enter age (years) using the format and bounds in the input table. Zero and an empty field are different: use zero only if it is allowed and represents your data.
If your answer differs from the example, choose Reset and compare every field, including selected units and options. Check percentage versus decimal entry and whether values describe the same period. Round only the final displayed answer when reproducing the formula.
If a discrepancy remains, report the calculator issue with the page address, non-sensitive example inputs, actual result, expected result and a reference for your calculation.