How to use the child calorie deficit calculator
Prepare the values for this calculation
Calculate an energy-budget deficit or surplus from an entered maintenance estimate and planned intake. 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
- Maintenance estimate (kcal/day): enter a value at least 0. Use the unit named in the label or selected above. Do not leave this required field blank.
- Planned intake (kcal/day): enter a value at least 0. 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 Daily calorie deficit first. With the unchanged example inputs, it is 500 kcal/day. Compare the additional metrics with the primary result; each has its own label and unit.
Compare and keep a useful result
For a controlled comparison, keep every other example input unchanged and change Maintenance estimate (kcal/day) from 2400 to 2640. The resulting Daily calorie deficit is 740 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.
Child Calorie Deficit Calculator formula
Daily energy difference=maintenance estimate−planned intake.
Inputs and units
| Input | Format / range | Example |
|---|---|---|
| Maintenance estimate (kcal/day) | minimum 0 | 2400 |
| Planned intake (kcal/day) | minimum 0 | 1900 |
Worked example
Using the example inputs above, the daily calorie deficit is 500 kcal/day.
- Daily calorie deficit
- 500 kcal/day
- Deficit
- 500 kcal/day
Results and assumptions
Energy-balance estimates are planning approximations; individual energy needs and weight change vary.
Fix an input or unexpected result
Maintenance estimate (kcal/day) is required. Enter maintenance estimate (kcal/day) 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.