Free tools · Fuel calculator
boltin ben · runner fuel

runners.
yes, macros
matter

punch in your weight and today's run. real numbers in about 30 seconds. most runners find out they've been eating too little, carbs especially.

dial it in (optional)

add these and the calories come from your actual bmr instead of a rough estimate. leave them blank and we'll estimate from your macros.

enter your weight and pick today's run to see your numbers

fuel sorted. now the training.

numbers like these only matter if the running behind them is right.

my plans cover every distance, from your first 5K to the marathon. take one as a PDF, on your watch, or with my voice feedback.

see the plans →
from $19 · prices in AUD

starting points built on population averages for healthy runners, not medical or clinical advice. targets are a place to begin, then adjust to how you actually feel, train and recover. if you have a health condition or an eating disorder history, work with a dietitian before changing your intake.