Prompt Library

Calorie Counter Prompts for Estimating Meals, Macros & Daily Targets

20 copy-paste prompts

Turn ChatGPT into a quick food-logging assistant: estimate calories for any meal, break down protein, carbs and fat, set realistic daily targets, and troubleshoot plateaus. Copy, paste, and fill in your own foods.

In short: This page contains 20 copy-paste ready prompts, organized into 4 categories with a description and pro tip for each. The first 15 prompts are free instantly โ€” no signup needed. Hand-curated and tested by the AI Academy team.

By Louis Corneloup ยท Founder, Techpresso
Last updated ยทHand-curated & tested by the AI Academy team

Estimate & Log Meals

5 prompts

Estimate a single meal

1/20

Estimate the calories and macros for this meal: [describe the food and portions]. Include: a per-ingredient breakdown, total calories, and grams of protein, carbs and fat. Flag which numbers are rough guesses.

Gives a calorie and macro estimate for one plate of food, ingredient by ingredient.

๐Ÿ’ก

Pro tip: Give portions in grams, cups, or 'palm-size' where you can โ€” vague amounts like 'some rice' widen the error massively.

Log a whole day

2/20

Here is everything I ate today: [list meals and snacks with rough portions]. Include: a running calorie total, macro totals, and a note on which meal contributed the most calories. Keep it in a simple table.

Adds up a full day of eating into one calorie and macro total with a table.

๐Ÿ’ก

Pro tip: Paste your day in one message rather than meal-by-meal so the running total stays accurate and easy to scan.

Estimate a restaurant dish

3/20

Estimate the calories for this restaurant dish: [dish name and restaurant if known]. Include: a likely calorie range (low to high), the main calorie drivers, and one swap to lower it by ~200 calories.

Produces a calorie range for a menu item you didn't cook yourself.

๐Ÿ’ก

Pro tip: Restaurant portions and oils vary wildly โ€” trust the high end of the range when eating out.

Compare two options

4/20

Compare the calories and macros of [option A] versus [option B]. Include: side-by-side totals in a table, which is higher in protein, and which better fits a goal of [your goal].

Puts two meal or snack choices side by side so you can pick the better fit.

๐Ÿ’ก

Pro tip: Add your actual goal (fat loss, muscle, energy) so 'better' is judged against what you care about, not just fewer calories.

Decode a nutrition label

5/20

Here is a nutrition label: [paste the values and serving size]. Include: the calories and macros for the amount I actually ate ([your portion]), not just per serving, and whether it's high in added sugar or sodium.

Scales a packaged-food label to the real amount you consumed.

๐Ÿ’ก

Pro tip: Servings on labels are often smaller than what people eat โ€” always tell it your real portion.

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Set Your Targets

5 prompts

Estimate daily calories

6/20

Estimate my daily calorie needs. Details: [age, height, weight, activity level, and goal]. Include: an approximate maintenance number, a target for my goal, and a clear note that this is an estimate, not a prescription.

Gives a rough maintenance and goal-based daily calorie figure from your stats.

๐Ÿ’ก

Pro tip: These formulas are population averages โ€” treat the number as a starting point and adjust based on how your weight actually trends over 2-3 weeks.

Set a macro split

7/20

Suggest a macro split for [your daily calorie target] calories aimed at [your goal]. Include: grams of protein, carbs and fat, a short reason for each, and a higher-protein alternative version.

Converts a calorie target into daily protein, carb, and fat gram goals.

๐Ÿ’ก

Pro tip: Prioritize hitting your protein number first โ€” it's the macro most tied to satiety and keeping muscle.

Build a target for a restriction

8/20

Set calorie and macro targets that fit [dietary restriction or preference, e.g. vegetarian, dairy-free]. Include: daily numbers, 3 easy protein sources that fit the restriction, and a common nutrient to watch.

Tailors your daily numbers around a dietary restriction or preference.

๐Ÿ’ก

Pro tip: Name the exact restriction and any foods you dislike so the protein suggestions are actually usable.

Plan a calorie budget for an event

9/20

Help me plan a calorie budget for [event, e.g. a dinner out or party] while staying near [daily target]. Include: how to 'bank' calories earlier in the day, what to prioritize, and a realistic non-restrictive approach.

Spreads your daily budget around a big meal or social event.

๐Ÿ’ก

Pro tip: Ask it to keep protein and fiber high earlier in the day so you arrive full, not starving.

Reverse-engineer a target from a goal

10/20

I want to [goal, e.g. lose ~0.5kg per week] safely. Details: [current stats]. Include: a suggested calorie adjustment, why extreme cuts backfire, and a sustainable weekly range rather than one aggressive number.

Works backward from a goal to a moderate, sustainable calorie adjustment.

๐Ÿ’ก

Pro tip: Ask it to cap the deficit at a moderate level โ€” very low intakes are hard to sustain and often stall progress.

Track & Adjust

5 prompts

Weekly calorie review

11/20

Here are my daily calorie totals for the week: [list the 7 numbers]. Include: my daily average, how it compares to my target of [target], which days ran high, and one small change for next week.

Averages a week of logs and highlights the days that drifted off target.

๐Ÿ’ก

Pro tip: Judge yourself on the weekly average, not any single day โ€” one high day rarely matters over seven.

Adjust after a plateau

12/20

My weight has stalled for [time period] on ~[calories] per day with goal [goal]. Include: likely reasons a plateau happens, 2-3 things to check before cutting more, and a small evidence-based adjustment to try.

Suggests measured tweaks when the scale stops moving.

๐Ÿ’ก

Pro tip: Check consistency and portion creep before dropping calories โ€” most 'plateaus' are untracked bites and drinks.

Find hidden calories

13/20

Review my typical day for hidden or easy-to-miss calories: [describe your usual foods and drinks]. Include: the top 3 likely culprits, roughly how much they add, and a lighter swap for each.

Spots the oils, drinks, and extras that quietly inflate your total.

๐Ÿ’ก

Pro tip: Cooking oils, lattes, and 'a handful' of nuts are the classic hidden hundreds โ€” measure them for a week.

Rebalance a heavy day

14/20

I went over by about [amount] today eating [what happened]. Include: a calm, no-guilt reframe, whether it actually matters over a week, and how (or whether) to adjust tomorrow without overcorrecting.

Gives a level-headed plan after a day that ran over budget.

๐Ÿ’ก

Pro tip: Never 'punish' an over-day with a crash day โ€” a normal day tomorrow is the right move.

Estimate calories burned in a workout

15/20

Roughly estimate calories burned for this workout: [type, intensity, duration, and your weight]. Include: a range not a single number, why trackers overestimate, and a reminder not to fully 'eat back' every calorie.

Gives a cautious range for exercise calories so you don't over-credit them.

๐Ÿ’ก

Pro tip: Wearables and machines routinely overestimate burn โ€” assume the low end of any range.

Stay Consistent

5 prompts

Build a repeatable meal template

16/20

Build me 3 go-to meals that land near [calorie target per meal] and [protein goal]. Include: simple ingredients, rough portions, and the calorie/macro estimate for each so I can reuse them without re-logging.

Creates repeatable default meals so you don't recalculate every day.

๐Ÿ’ก

Pro tip: Having 3-4 'known-number' meals on rotation is the single biggest thing that makes tracking sustainable.

Quick swaps to cut calories

17/20

Give me painless swaps to cut roughly [amount] calories a day from my usual foods: [list them]. Include: the swap, the approximate saving, and a note that it shouldn't leave me hungry.

Lists low-effort substitutions that trim calories without misery.

๐Ÿ’ก

Pro tip: Pick swaps you actually enjoy โ€” a 'perfect' swap you hate won't last a week.

Higher-volume, lower-calorie ideas

18/20

Suggest high-volume, filling meals under [calorie target] for when I'm hungry. Include: the foods, why they're filling (protein, fiber, water), and a rough calorie estimate for each.

Finds big, satisfying meals that stay within a low calorie ceiling.

๐Ÿ’ก

Pro tip: Volume from veg, lean protein, and broth-based dishes fills you up for far fewer calories than dense snacks.

Motivation check-in

19/20

Act as a supportive, non-judgmental coach. My tracking has slipped because [reason]. Include: a kind reframe, one tiny restart step, and a reminder that consistency beats perfection. Keep it under 120 words.

Gives an encouraging nudge to restart after falling off tracking.

๐Ÿ’ก

Pro tip: Ask for one tiny restart step, not a full overhaul โ€” momentum comes from small wins.

Grocery list from targets

20/20

Build a grocery list for a week of eating near [daily calorie target] and [protein goal] with [any restrictions]. Include: staple proteins, veg, carbs and snacks, grouped by store section, that make hitting my numbers easy.

Turns your targets into a categorized weekly shopping list.

๐Ÿ’ก

Pro tip: Stock mostly single-ingredient staples โ€” they're far easier to estimate than mixed packaged foods.

Frequently Asked Questions

They're educated approximations, not lab measurements. ChatGPT is good for ballpark ranges and comparing options, but exact numbers depend on portions, cooking method, and specific ingredients. Treat estimates as a guide and give the most precise portions you can.
No. ChatGPT is a planning and journaling aid, not medical or nutritional advice. It can't diagnose conditions or prescribe a diet. For medical conditions, weight concerns, disordered eating, or a personalized nutrition plan, consult a qualified doctor or registered dietitian.
Yes. All the prompts here work on the free tier of ChatGPT. Just copy a prompt, replace the bracketed placeholders with your own foods and stats, and paste it in. No signup or app beyond ChatGPT is required.
Give specifics: weigh or measure portions, name brands, and describe cooking method and oils. Paste nutrition labels when you have them and tell it your real serving. The more concrete your input, the tighter the estimate.
No โ€” very low or extreme targets are hard to sustain and can backfire. A moderate, gradual approach is more livable and effective. Ask ChatGPT for a sustainable range, prioritize protein and fiber, and check with a professional before any aggressive change.

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