Marathon carb load calculator

The best part of running a marathon: carb loading! You can carb load 2–3 days before the race. This calculator is built around a three-day carb load, which is easier. You don't have to stuff as much down at once. And as a plus, you get to eat tons of carbs for one more day.

Enter your weight and target time to get a suggested carb intake in the days leading up to the race.