Cycling Fueling Calculator

Get personalized carb, fluid, and sodium targets with a practical fuel plan for any ride duration and intensity.

Ride Details

Fueling Plan

Calculate to see carbs, fluid, sodium targets and practical fuel plan.

Interpretation

  • Fueling targets are ranges, not fixed numbers. Individual tolerance varies.
  • Higher carb rates (>60 g/hr) require gut training — build up over 2-4 weeks.
  • Hot weather and high intensity both increase fluid and sodium needs significantly.

What to Do Next

  • Practice your fueling strategy on training rides before race day.
  • Start fueling early in the ride — waiting until you feel hungry means you are already behind.
  • Use the Race Predictor to estimate ride duration, then plan fuel accordingly.

Methodology

Version v1.0
Updated 2026-06-20
Owner Cycling Regimen Editorial

  • ACSM/ISSN guidelines

    Carb rates based on current sports nutrition position stands (Jeukendrup 2014, Thomas 2016).

  • Sweat rate model

    Fluid needs scaled by temperature and intensity using published ranges.

  • Practical translation

    Converts grams into real products (gels, bottles, bars) for actionable planning.

About Our Calculation Approach

Frequently Asked Questions

How many carbs per hour should cyclists eat?

For rides under 90 minutes, minimal fueling is needed. For 2-3 hours, target 60-90 g/hr. For 4+ hours, trained athletes can benefit from 90-120 g/hr using glucose-fructose combinations.

Do I need to fuel on rides under 1 hour?

Generally no. Your glycogen stores are sufficient for rides under 60-90 minutes at moderate intensity. Water is usually enough.

What is gut training for cycling nutrition?

Gut training means gradually increasing carb intake during training rides over 2-4 weeks. This improves gastric emptying and intestinal absorption, allowing higher fuel rates without GI distress on race day.

How much sodium do cyclists lose?

Typical sweat sodium is 300-600 mg/L. At moderate sweat rates (500-1000 mL/hr), that means 300-1000 mg sodium per hour. Heavy sweaters in hot conditions may need more.

Disclaimer: This calculator provides estimates based on published exercise science models. Results are not medical advice. Individual physiology, health status, and environmental conditions affect real-world outcomes. Consult a qualified healthcare provider or certified coach before making training decisions based on these outputs.