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Net Carbs Calculator

Compute net carbs from total carbs, fiber and sugar alcohols, per serving and per day.

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Alcohol Calorie CalculatorAdd up the calories of a drinking session from a library of beers, wines, spirits and cocktails, with a custom-drink option.Breastfeeding Calorie CalculatorExtra daily calories while breastfeeding — about +500 kcal exclusive, with a gradual weight-loss option.Carb-to-Insulin Ratio CalculatorEstimate a starting carb ratio from your total daily dose using the 400/450/500/550 rule, with an optional mealtime bolus.Carbohydrate CalculatorEstimate your daily carbohydrate target from BMR, TDEE and your chosen carb approach.Intermittent Fasting CalculatorPlan your fasting and eating windows (16:8, 18:6, OMAD…) from your last meal time.Calories per meal calculatorSplit your daily calorie target evenly across your meals.Daily sugar intake calculatorFind your WHO free-sugar limit from your daily calorie intake.Fiber intake calculatorFind your recommended daily fiber from sex and age (IOM).

Open Net Carbs Calculator and you get an answer straight away, with no account to create. You will find it under Nutrition, with Alcohol Calorie Calculator and Breastfeeding Calorie Calculator for the neighbouring cases.

How to use it

  1. Open the tool — no signup or install needed.
  2. Enter your input or adjust the available options.
  3. Get your result instantly, then copy or download it.

Frequently asked questions

What is Net Carbs Calculator?

Compute net carbs from total carbs, fiber and sugar alcohols, per serving and per day.

When would I actually use this?

Planning meals against a target, checking whether a habit covers the recommended intake, and translating a label into what it means for the day.

What is the most common mistake?

Treating a daily target as a daily requirement. Reference intakes are population averages over time; a day above or below one means nothing on its own.

Is there a tool for the next step?

Breastfeeding Calorie Calculator is the closest one after this: Extra daily calories while breastfeeding — about +500 kcal exclusive, with a gradual weight-loss option.

What else is worth having open alongside it?

Carb-to-Insulin Ratio Calculator and Carbohydrate Calculator — they come up in the same task often enough to be worth a second tab.

Where do the figures come from?

Reference intakes come from public health bodies (EFSA in Europe, the NIH and USDA in the United States) and differ between them. They describe populations, not you, and are not medical advice.

Further reading

All guides →
ExplainerNet Carbs: What the Subtraction AssumesNet carbs is total carbohydrate minus fibre minus sugar alcohols. Every term in that line is a modelling choice, the first one is defined differently on each side of the Atlantic, and no regulator anywhere defines the result.Comparison16/8, 5:2 or Alternate Day: The Fasting Protocols ComparedFive protocols side by side, what each demands, and the uncomfortable finding from the controlled trials: matched for calories, fasting loses about the same weight as simply eating less.How-toHow to Calculate Keto Macros (Without Starting From the Percentages)Set carbs as a fixed gram figure, protein by body weight, and let fat fill what is left. The famous 75 percent fat is an output of that calculation, not an input — and it drops on its own in a deficit.GuideWhat a Meal Plan Generator Can and Cannot KnowA generator solves a constrained arithmetic problem — hit an energy target, hit the macro splits, stay inside a food list — and it does that well. Here is the arithmetic that makes a plan work, and the honest list of what no generator can see.ExplainerHow Much Carbohydrate Do You Actually Need?There is a small hard answer — the brain's glucose demand, published as 130 g a day — and a very large soft one. Above the minimum, carbohydrate need scales with training volume in grams per kilogram, not with a percentage.ExplainerHow Much Fiber Per Day Do You Need?Daily fiber targets of 25 to 38 grams by sex and age, why fiber matters for digestion and heart health, and the best food sources to hit your goal.