Carb Cycling Calculator (7-Day Plan)
Choose how many high, moderate and low-carb days you want; get calories and macros for each type and a weekly plan.
7-day carb cycling plan
A typical week: 2 high-carb days on the hardest training days, 3 moderate days, 2 low-carb days on rest days. High days might carry 4–5 g carbs per kg body weight, moderate 2–3 g/kg, low around 1 g/kg, with protein constant and fat moving opposite to carbs. The calculator builds the schedule from your TDEE and goal.
Carb cycling for fat loss
Over a week, carb cycling is still a calorie deficit — the weekly average is what drives fat loss. The pattern’s advantages are practical: hard sessions are fuelled, low days feel manageable because they are short, and higher-carb days help with training performance and adherence. Evidence that cycling beats a steady deficit at matched calories is limited.
Macros on high vs low days
Keep protein at 1.6–2.4 g/kg every day. On high days carbs rise and fat drops toward 20% of calories; on low days fat rises toward 35% to keep meals satisfying. Total calories can be equal every day or slightly higher on high days; the calculator shows both options.
Who should (and should not) carb cycle
Useful for lifters and endurance athletes who train on some days and rest on others, and for people who find steady low-carb dieting hard. Not necessary for beginners or anyone who prefers a simple daily target — a consistent deficit with adequate protein achieves the same result. People with diabetes should not vary carbohydrate intake this way without medical guidance.
Sources
- ISSN Position Stand: protein and exercise, 2017 — https://pubmed.ncbi.nlm.nih.gov/28642676/
- ISSN Position Stand: nutrient timing, 2017 — https://pubmed.ncbi.nlm.nih.gov/28919842/
- Dietary Guidelines for Americans (current edition; AMDR) — https://www.dietaryguidelines.gov/
This calculator is educational and not medical advice. If you have a health condition, are pregnant, or are under 18, ask a clinician before changing your diet.
What the result tells you
Three daily calorie and carbohydrate targets — high, normal, and low — to match carbs to your training.
How to use it
- Eat the high-carb day on hard training days, low on full rest days, normal in between.
- Keep protein the same every day; only carbs and total calories shift.
- Aim for the weekly pattern, not perfection on any single day.
Recommendations
- Put most high-day carbs around your workout.
- If energy or recovery dips, raise the low-day carbs a little.
- This is an advanced tweak — a steady daily target works fine for most people.
Health & wellbeing
Carb cycling adds complexity for a small benefit. If it makes eating stressful, a consistent daily plan is just as effective.
Troubleshooting
Days feel too different? Narrow the high/low gap. The point is to shift carbs toward training, not to swing wildly.
How it’s calculated
Each day scales your maintenance calories up or down, and sets carbohydrate as a share of that day's calories.
High = TDEE × 1.20 (55% carbs) · Normal = TDEE (40% carbs) · Low = TDEE × 0.75 (20% carbs); carbs = day calories × share ÷ 4.
Source: TDEE via Mifflin–St Jeor (1990); cycling percentages are a common training framework.
Common questions
How many carbs on a low-carb day?
Commonly 0.5–1 g per kg body weight (about 50–80 g for most adults).
Should high-carb days be on training days?
Yes — that is the point of the pattern.
Can I carb cycle on keto?
Cyclical keto exists, but it is a different protocol with much lower carb days.