50Five
Star
Gels
Bounce
the gel
to get
in!
50
5 bounces to get in
It wants to be bounced. They all do.
In a hurry? Skip the warm-up →
50Five
Star
Gels
Open calculator
The
right
gel
changes
the race!
Pair of racing trainers
Free · no sign-up · results shareable by link
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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.

Open the calculator →

What
you get

1

Money, made concrete

Cost per gram of carbohydrate, plus what a 12-week training block really costs you in gels versus DIY mix.

2

Buy, make — or both

DIY mixes compared directly against commercial gels, instead of only spitting out a recipe.

3

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.

Get
fueling

AI fuelling prompt generatorMarathon fuelling guideHYROX fuelling guideCommercial gel comparison

Same rule as the calculator: numbers you can check, estimates labelled as estimates, and nothing that reads like a brochure.