Everything Your Fueling Plan Is Missing

CarbRate builds your plan around your course, the weather, and the products you use. Then it trains your stomach to handle it on your long runs and tells you exactly when to fuel during the race. No stomach issues, no wall.

Works oniPhoneAndroidYour computer
Start here
Full Pro, month to month
Monthly
Subscription · cancel anytime
$9.95per month
Full access, billed monthly
Every feature, for as long as you are training. Cancel anytime in one tap.
Start monthly
Renews at $9.95/mo until cancelled · cancel anytime in one tap
No subscription
Race Pass
One-time · 18 weeks of full access
$49.95once
One payment covers your whole build
Prefer not to subscribe? One payment gives you 18 weeks of full access. It expires on its own, so there is nothing to cancel.
Get the Race Pass
No subscription · no cancellation · 18-week access
Best value
Annual
Subscription · billed yearly
$89.95/ year
Save $29.45 vs. paying monthly
Running two or more races this year? Annual covers all of them and costs less than two Race Passes.
Go annual
Renews at $89.95/yr until cancelled · your plans and history stay yours
Why it's worth it

What does CarbRate do that a general fueling plan can't

Monthly, Race Pass and Annual all include everything below.

🏁

Personalized to your body and goal

A gel every 30 minutes gives every runner the same 50 grams of carbs an hour, whether you weigh 120 pounds or 180 pounds. If that's less than you burn, you still hit the wall, even though you took your gels.

CarbRate builds your plan from your weight, your goal time, the amount of glycogen you burn and what your stomach handles today, so you take in the amount your race needs.

⛰️

Built for your exact course

Most fueling plans go by the clock. But what if your planned time to take a gel comes right in the middle of a hill, or there's no aid station close by to grab water from?

CarbRate places every gel and every drink on the real course you are running, so you never take a gel without water or try to fuel while running up a hill.

🔊

CarbRate tells you exactly when to fuel during the race

Even a well-practiced fueling plan is hard to follow for 26 miles. Miss a gel or two and you are short on fuel in the final miles.

On race day CarbRate counts down to every gel and drink and tells you out loud what to take, over your music. Nothing to memorize and no math while you are running.

🌡️

Ready for race-day weather

A fueling plan written weeks before the race can't account for a hot race morning or a dropped bottle.

The warmer the weather, the more CarbRate shifts carbs from gels into your drink, so you take in fluid and fuel together and your stomach stays settled. If you drop a bottle or your stomach turns during the race, CarbRate tells you what to do next.

"Why not just a gel every 30 minutes?"

That rule gives every runner the same plan for every race. Here is how your CarbRate plan is different.

A gel every 30 minutesYour CarbRate plan
TimingBy the clock, even when that puts a gel in the middle of a hill or far from water.By the course. Every gel is placed near water and away from the hills.
WeatherThe same plan whether race morning is 45°F or 80°F.Adjusts to the race-day forecast and your measured sweat rate.
During the raceYou keep track of every gel and drink yourself.CarbRate tells you out loud: "gel at the station in 0.4 miles."
How much50 grams of carbs an hour for everyone, whether you weigh 120 pounds or 180 pounds.Personalized to your weight, your goal time and what your stomach can handle, and practiced before race day.
Built for your exact course

Every gel and drink placed on your actual course

CarbRate uses your race's actual elevation profile and the aid stations the race publishes.

Newton hillsStartFinish
Gels placed before the climb Aid stations Course elevation

The Boston Marathon: caffeine before the Newton hills, no gel on Heartbreak Hill, and every gel next to an aid station.

In the research

Runners given a fueling schedule finished 11 minutes faster

11 minfaster than matched runners who fueled by feel

A 2014 research study compared the marathon results from 14 pairs of marathoners, matched on fitness. The runners given a structured fueling schedule finished in 3:38:31. The runners who fueled by feel finished in 3:49:26.

That's about 11 minutes (4.7%) faster from a fueling schedule alone, with no extra stomach trouble. The runners fueling by feel took in 38 grams of carbs an hour. The runners on a schedule took in 65 grams of carbs an hour.

Scheduled3:38
By feel3:49
Hansen et al., Improved Marathon Performance by In-Race Nutritional Strategy Intervention, Int. J. Sport Nutrition & Exercise Metabolism, 2014; 24(6):645–655. 14 matched pairs. These are the results of one study, not a guarantee of your result.
Train your gut to handle more fuel

CarbRate trains your stomach to handle your fueling plan

Your gut is a muscle you can train.

Runners who fuel by feel take in about 38 grams of carbs an hour. The target is 60 to 90 grams. An untrained stomach can't absorb that much, which is why gels cause stomach issues and you still hit the wall despite fueling correctly.

Studies have shown that 2 weeks of repeated fueling practice raised carbohydrate absorption by 45 to 54%, while upset stomach symptoms fell 26 to 47%. That's why CarbRate gives you a practice plan that starts at what your stomach handles today and raises the target week by week.

📊
CarbRate tracks every practice run. You log each run in a 30-second review: the carbs and fluid you took, any caffeine, how your stomach handled it, even the weather.
🎯
CarbRate tells you exactly what to change next. One change per run, based on your actual data: push to 80 grams an hour, or take your first gel earlier. You always know how hard to push, and no long run gets wasted on a guess.
🔧
CarbRate fixes what isn't working. If a specific gel is what upset your stomach, CarbRate shows you gels and drinks that fit your plan and swaps them in.

Questions people ask before buying

Why is there no free trial or money-back guarantee?
The free plan is a real race-day fueling plan and it never expires. It shows the first hour of your race in full, so you can see how CarbRate works before you pay anything.
What exactly is the Race Pass?
One payment of $49.95 for 18 weeks of full access, starting the day you buy. That covers a full marathon build and the week after your race. It expires on its own, so there's nothing to cancel.
Race Pass or Annual: which is for me?
If you're running one race this year, the Race Pass costs less. If you're running two or more, Annual costs less than two Race Passes and covers you all year.
What happens after my 18 weeks (or if I cancel)?
You keep everything you've recorded: your sweat tests, your plans and your race reports. Your account moves to the free plan, and you can upgrade again for your next race.
Why do I check out on the web?
You buy CarbRate Pro here on carbrate.com and it unlocks in the app. Managing billing on the web is what lets us offer the one-time Race Pass and lets you update, pause, or cancel any time from your account.
I don't have an iPhone. Can I use it?
Yes. CarbRate runs in the browser at app.carbrate.com on Android and desktop, with the same account and the same Pro. Live race-day guidance stays on the iPhone app; everything up to the start line works on the web.
I'm outside the US. Can I still use it?
Yes. Buy CarbRate Pro here on the web from anywhere, then sign in with the same email in the app and your plan unlocks.

Never hit
the wall again.

Your full fueling plan, your practice schedule and live race-day guidance. $9.95 a month, cancel anytime. Or one Race Pass payment of $49.95, with nothing to cancel.

Start monthly →
Cancel anytime · your full plan opens in the app as soon as you pay.