Meal Estimate Range Calculator
A meal photo or visual estimate cannot reveal every quantity and ingredient. Build a transparent range for portions, oils, sauces, toppings, and other uncertain additions.
Published by Reeve Editorial Team · Methods and sources updated
Use an example to explore the inputs, then replace its assumptions with what you know about your meal. These examples are illustrative, not nutrition facts about a specific dish.
Illustrative calorie range
553–948
Calories, given your chosen assumptions.
Midpoint for reference
750 kcal
Keep a consistent approach; do not repeatedly pick the end that matches a target.
Inputs stay in this tab. Saving keeps a copy on this device until you reset or clear it.
This range describes assumptions; it does not prove that the actual value falls within them. Replace assumptions with labels, recipes, and measured portions when possible.
How this tool works
The base estimate is expanded up and down by the selected portion-uncertainty percentage. Known additions are applied to both ends, while uncertain additions use the minimum and maximum values entered.
The midpoint provides a consistent working value when a single journal entry is required. It is not presented as the most likely true value; it is simply the center of the assumptions entered.
Use better evidence when it exists. Restaurant nutrition information, package labels, a recipe calculation, or a measured portion should replace a visual assumption rather than merely narrowing the range by intuition.
Sources
Frequently asked questions
Does the range contain the true calorie value?
Not necessarily. It represents the uncertainty assumptions you entered. Hidden ingredients or incorrect source data can still put the true value outside the range.
What should I log if my food journal accepts one number?
A consistent midpoint is one reasonable approach. Avoid repeatedly choosing the low or high end to make the day match a preferred total.
How wide should portion uncertainty be?
Use zero for a measured quantity and a wider range when depth, scale, recipe, or serving size is unclear. The presets are communication aids, not validated confidence intervals.