Convert daily calories and a chosen carbohydrate percentage into grams, or estimate maintenance energy with shared adult equations and optional meal allocation.
01 / ENERGY & CARBOHYDRATES
Estimate daily energy from adult measurements, or use Quick Calculation if you already know your calorie target. The starting percentage is adjustable; no single share is best for everyone.
02 / DAILY CARBOHYDRATES
Calculate to see carbohydrate grams, their energy share and optional comparisons or portions.
03 / ASSUMPTIONS
The 45–65% adult AMDR is a general energy-share reference, not a personal optimum. Diabetes, pregnancy, illness and other clinical needs require individualized professional guidance.
Grams = daily kcal × carbohydrate percentage ÷ 100 ÷ 4. The standard 4 kcal/g applies to digestible carbohydrate; fiber, sugar alcohols and food-label conventions can differ. The unassigned energy is not automatically divided into fat and protein. A value outside the reference range remains arithmetic, not a dietary recommendation.
Population equations and conventional activity multipliers are estimates, not measured metabolism. Activity adjustment combines movement, daily living and food-related expenditure; it is not an independently measured exercise or digestion allocation. Pregnancy, breastfeeding, growth, illness, eating-disorder recovery and other individual circumstances need qualified guidance.
Dietary Reference Intakes: general adult AMDR referenceEnter your values locally; no inputs are uploaded.
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Use direct daily calories or personal-input maintenance estimation. Choose a carbohydrate share, calculate grams and optionally compare percentages or split the displayed total into portions.
Beginner-friendly controls, optional advanced settings, transparent estimates and private browser-local calculation.
Inputs are processed locally in your browser; no photos, uploads or personal profiles are required.
Grams = daily kcal × carbohydrate percentage ÷ 100 ÷ 4. The standard factor is 4 kcal per gram of digestible carbohydrate. Fiber, sugar alcohols and food-label conventions can differ, so this is an energy-planning simplification.
Quick mode uses the daily calorie amount you enter and does not require body measurements. Personal mode estimates adult maintenance energy through the same Mifflin, revised Harris–Benedict or Katch–McArdle engine as the Calorie Calculator, with the same unit conversions and activity conventions.
No. The general adult AMDR reference is 45–65% of energy, but that range is not a universal optimum or a personal prescription. Needs vary with activity, food preferences, health and circumstances. Example percentage buttons are arithmetic examples rather than recommended diets.
Yes. An optional comparison uses chosen lower and upper percentages plus your current share, without duplicate rows. Each row independently converts the same daily calories into grams. The remaining energy is not automatically divided between protein and fat.
The optional equal portion split allocates tenths of a gram so the displayed portions add to the displayed rounded daily total. It is a simple allocation, not a meal plan, recommendation for meal timing or clinical carbohydrate-counting instruction.
No. It does not set medication doses, blood-glucose targets or therapeutic diets. Diabetes, pregnancy, breastfeeding, illness and other clinical circumstances need individualized professional advice. An entered calorie amount is an arithmetic input, not an endorsement of that intake.