Diabetes Macro Calculator for Daily Protein, Carbs and Fat
Enter your age, height, weight, activity level and goal. The calculator returns a daily calorie target with protein, carbohydrate and fat grams, using a split weighted for blood glucose control.
Fill out the form to see your personalized results
Your macro and water intake recommendations will appear here
How the numbers are worked out
Your resting burn comes from the Mifflin-St Jeor equation, which uses weight, height, age and sex. An activity factor between 1.2 for a desk job and 1.9 for heavy daily training turns that into maintenance calories. A 52 year old man at 88 kg and 175 cm who walks daily lands near 2,450.
The goal adjusts the total, with fat loss taking 15 to 20 percent off. The calories then split into grams. Protein sits at 1.2 to 1.6 g per kilogram of body weight, high enough to hold muscle and slow a meal's glucose response. Fat takes 30 to 35 percent of calories, weighted toward unsaturated sources. Carbohydrate takes the remainder, usually 40 to 45 percent rather than the 50 to 55 percent of a standard split.
This is nutrition arithmetic, not a treatment plan. Medication doses, insulin ratios and target ranges belong to your doctor or diabetes educator, and any large change to your carbohydrate intake should be discussed with them first because it can change how much medication you need.
Who this is for
People with type 2 diabetes or prediabetes who were told to watch carbs without being given a number. It also suits anyone counting carbohydrate for insulin dosing who wants the protein and fat side of the plate set sensibly too.
Carb counting and macro tracking are the same activity done at different resolutions. If you already count grams per meal, this page gives you the daily total those meals should add up to.
Carbs per meal for stable blood sugar
The daily total matters less than how it is distributed. Most guidance lands near 45 to 60 g of carbohydrate at each main meal and 15 to 20 g at a snack, which spreads the load rather than concentrating it in one spike.
Type matters alongside amount. The same 45 g as lentils, oats or whole fruit releases far more slowly than as white rice or juice, because fibre and intact structure slow digestion. Aim for 25 to 30 g of fibre a day inside the carb target.
Macros for weight loss with type 2 diabetes
Losing 5 to 10 percent of body weight improves insulin sensitivity for most people with type 2, and that is a smaller change than most diets aim for. An 88 kg man is looking at 4 to 9 kg, not 20.
Use a 15 to 20 percent deficit and keep protein high, which protects muscle and keeps hunger manageable. Expect 0.25 to 0.5 kg a week. Tell your doctor before you start, because glucose lowering medication often needs adjusting as weight comes off.
Track it in NutriScan
Carbohydrate is the number that decides the next few hours, and it is easy to misjudge by eye. NutriScan logs meals from a photo, your voice, a barcode or typed text, then shows carbs, protein, fat and fibre for the meal and for the day so far.
Logging beside a glucose reading is where it gets useful. After a couple of weeks the pattern shows up, and the meals that reliably spike you become obvious. The free plan gives you 5 photo scans a week, unlimited manual logging, water tracking and the fasting timer. Premium removes the scan cap and costs about $59 a year.
Frequently asked questions
How many carbs a day should someone with diabetes eat?
There is no single answer. Most plans land between 130 and 200 g a day, spread across meals at 45 to 60 g each. The calculator sets your figure from your calorie target, and your doctor may set a different one based on your medication and readings.
Is a low carb diet better for type 2 diabetes?
Lower carb intakes improve glucose control for many people, but the effect depends on sticking with it. A moderate target you keep for years usually beats a very low one you abandon in six weeks. Talk to your doctor before a large cut, since medication may need changing.
Does protein raise blood sugar?
Only slightly, and slowly. Protein has a small effect compared with carbohydrate, and eating it alongside carbs flattens the overall response. That is why a plate with chicken and rice behaves differently from rice alone.
Should I count total carbs or net carbs?
Total carbohydrate is the safer default and is what most clinicians use. Net carb arithmetic varies by country and by label, and subtracting fibre can understate a meal. The calculator works in total carbohydrate.
Can I still eat fruit and rice?
Yes. Portion and pairing do most of the work. A serving of fruit with yoghurt or a cup of rice beside protein and vegetables fits a normal target. Sugary drinks are the harder case, because the sugar arrives without anything to slow it.
Related calculators
- Macro calculator for a standard split without the diabetes weighting
- TDEE calculator for maintenance calories at each activity level
- Weight loss calculator for a deficit and a projected finish date
- Calorie calculator for logging a meal from a photo or a line of text
- NutriScan for diabetes for how the app handles carb tracking day to day