Race fuel, priced honestly
Stop overpaying for race fuel.
Compare gels by cost per gram of carbohydrate and calculate your own DIY race mix for marathon, half marathon, HYROX and long training — with editable prices that work in any currency.
Free · no sign-up · results shareable by link
The numbers
Race Fuel Cost Calculator
A gram-accurate DIY bottle mix or soft-flask syrup for your race, its cost per gram of carbohydrate, an honest gut-load estimate, and what a full training block saves you versus gels.
Work out my race fuel →The fresh prices
AI Race Fuel Prompt Generator
A short questionnaire builds a copy-paste prompt for Claude, ChatGPT or any AI — find gels you can buy in your country, compare them with DIY, or build your marathon or HYROX fuelling plan.
Generate my prompt →Money, made concrete
Cost per gram of carbohydrate, plus what a 12-week training block really costs you in gels versus DIY mix.
Buy, make — or both
DIY mixes compared directly against commercial gels, instead of only spitting out a recipe.
An honest gut-load estimate
A concentration warning presented as an estimate, not a lab reading — with clear guidance on what to sip and what to chase with water.
Guides:Marathon & half fuelling·HYROX fuelling — or comparecommercial gelsdirectly in the calculator.