What calorie range would the average finisher of an Ironman race burn?

For example, a 130lb woman will expend roughly 7,290 calories, and a 200lb man will expend roughly 10,890 calories, all within the race itself. Here’s how that breaks down:

130lb Woman:
* Swim: 10cal/min x 90min swim = 900 calories
* Bike: 11cal/min x 6 hour bike = 3,960
* Run: 9cal/min x 4.5 hour run = 2,430
* Total: 7,290 calories

200lb Male:
* Swim: 15cal/min x 90min swim = 1,350 calories
* Bike: 16cal/min x 6 hour bike = 5,760
* Run: 14cal/min x 4.5 hour run = 3,780
* Total: 10,890 calories

Considering the average adult expends between 1,500-2,000 calories per day, it’s easy to see how a concerted nutritional effort is needed to make it through an Ironman race without the dreaded “bonk” (aka hyperglycemia).