What do the 1.15 / 1.00 / 0.80 multipliers represent?

These ratios set high days at 115% of TDEE, medium days at maintenance (100%), and low days at 80%. They reflect moderate carb-cycling protocols; more aggressive plans may use larger spreads, while conservative approaches stay closer to maintenance.

Does this calculator specify grams of carbohydrate per day?

No. It outputs total daily calorie targets for each day type. To determine carbohydrate grams, users must decide on protein and fat intakes, then allocate remaining calories to carbohydrate at 4 kcal per gram.

How is TDEE used in the calculation?

TDEE serves as the baseline for all day types. High days multiply TDEE by 1.15, medium days by 1.00, and low days by 0.80. The accuracy of the output depends entirely on the accuracy of the TDEE input.

Can I use any combination of high, medium, and low days?

Yes, provided the sum equals seven days per week. The calculator accepts any integer split from 0 to 7 for each category. Common patterns include 2 high / 2 medium / 3 low for strength athletes or 3 high / 2 medium / 2 low for endurance training blocks.

Why is the result shown as an average daily intake?

The tool sums the weekly calorie total and divides by seven to produce a mean. This average helps users compare overall energy balance across different cycling patterns while maintaining day-to-day variability in intake.

Macros & Intake

Carb Cycling Calculator

Estimate weekly calorie distribution across high-, medium-, and low-carb training days.

Last updated: 22 April 2026

What this tool does

This calculator distributes weekly calorie intake across high-, medium-, and low-carb days by applying fixed multipliers to total daily energy expenditure (TDEE): 1.15× on high days, 1.00× on medium days, and 0.80× on low days. It requires TDEE and the number of days assigned to each carbohydrate tier, then outputs daily calorie targets for each tier and a seven-day average. The multipliers reflect moderate carb cycling protocols documented in practitioner literature and are intended for individuals aligning carbohydrate intake with training volume across the week.

Inputs

Result

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Formula Used

kcal_{hi g h} = TDEE \times 1.15, kcal_{m e d} = TDEE \times 1.00, kcal_{l o w} = TDEE \times 0.80

TDEE

Total daily energy expenditure

d_{h}

High-carb days per week

d_{l}

Low-carb days per week

d_{m}

Medium-carb days per week

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This calculator distributes weekly calorie intake across high-, medium-, and low-carb days by applying fixed multipliers to Total Daily Energy Expenditure (TDEE). It multiplies TDEE by 1.15 for high days, 1.00 for medium days, and 0.80 for low days, then averages the weekly total into a daily mean.

How Carb Cycling Calculator works

The tool accepts TDEE and the number of high-, medium-, and low-carb days per week. Each day type receives a different calorie target: high days are set at 115% of TDEE, medium days at 100%, and low days at 80%. The calculator sums all seven days and divides by seven to produce an average daily intake. This approach is designed for users who align higher-carb days with training sessions and lower-carb days with rest or recovery work.

The formula

Weekly total calories = (TDEE × 1.15 × high_days) + (TDEE × 1.00 × medium_days) + (TDEE × 0.80 × low_days). Average daily intake = weekly total ÷ 7. The 1.15 / 1.00 / 0.80 multipliers reflect moderate cycling ratios documented in practitioner frameworks; more aggressive protocols can reach ±20% or beyond, while conservative approaches stay within ±10%.

Where this method is most accurate

The fixed multipliers assume carbohydrate is the primary macronutrient being cycled while protein and fat remain relatively stable. The calculation does not specify grams of carbohydrate per day type; it outputs calorie targets only. Accuracy depends on an accurate TDEE input—errors in maintenance-calorie estimation propagate directly into each day's target. The 1.15 / 0.80 spread is typical for moderate cycling; individuals with very high training volumes or specific metabolic conditions may require different ratios.

What this tool does not do

This calculator does not prescribe macronutrient splits, recommend training schedules, or determine whether carb cycling is appropriate for a given individual. It does not account for activity level on specific days—users must decide which calendar days are high, medium, or low based on training intensity. The tool does not provide meal timing, food choices, or supplementation guidance. It outputs calorie averages, not personalized nutrition plans.

Disclaimer

This tool is for educational and informational purposes only. It is not medical, dietetic, or training advice. Consult a physician, registered dietitian, or certified strength and conditioning specialist before making changes to diet or exercise routines. Individual responses to calorie and macronutrient manipulation vary; the calculator provides estimates, not guarantees of outcomes.

Questions

What do the 1.15 / 1.00 / 0.80 multipliers represent?: These ratios set high days at 115% of TDEE, medium days at maintenance (100%), and low days at 80%. They reflect moderate carb-cycling protocols; more aggressive plans may use larger spreads, while conservative approaches stay closer to maintenance.
Does this calculator specify grams of carbohydrate per day?: No. It outputs total daily calorie targets for each day type. To determine carbohydrate grams, users must decide on protein and fat intakes, then allocate remaining calories to carbohydrate at 4 kcal per gram.
How is TDEE used in the calculation?: TDEE serves as the baseline for all day types. High days multiply TDEE by 1.15, medium days by 1.00, and low days by 0.80. The accuracy of the output depends entirely on the accuracy of the TDEE input.
Can I use any combination of high, medium, and low days?: Yes, provided the sum equals seven days per week. The calculator accepts any integer split from 0 to 7 for each category. Common patterns include 2 high / 2 medium / 3 low for strength athletes or 3 high / 2 medium / 2 low for endurance training blocks.
Why is the result shown as an average daily intake?: The tool sums the weekly calorie total and divides by seven to produce a mean. This average helps users compare overall energy balance across different cycling patterns while maintaining day-to-day variability in intake.

Sources & Methodology

Applies fixed multipliers to TDEE: high day = TDEE × 1.15, medium = TDEE × 1.00, low = TDEE × 0.80. Weekly total is summed and divided by 7 for daily average. Multipliers reflect moderate cycling ratios documented in practitioner protocols (McDonald, ISSN Position Stand on nutrient timing).

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