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Both calculators run independently — change the inputs on either side to compare results.

Race Finish Time Calculator

Predict your total race finish time from distance and your planned pace per kilometre. Essential for pacing strategy before a 5K, 10K, half-marathon, or marathon.

Race Distance (km)

Pace (minutes) (min/km)

Pace (seconds) (sec/km)

Fill in the required fields to see your result.

Running

Marathon Fueling Calculator

Calculates how many grams of carbohydrates you need during a marathon or long race based on body weight, expected finish time, intensity, and weather. Use it during race planning to build your on-course nutrition strategy.

Body Weight (lbs)

Expected Race Time (minutes)

Race Intensity

Weather Conditions

Fill in the required fields to see your result.

Key differences

	Race Finish Time Calculator	Marathon Fueling Calculator
Category	Running	Running
Inputs required	3	4
Result	Finish Time (minutes)	Total Carbs Needed (grams)
What it does	Predict your total race finish time from distance and your planned pace per kilometre. Essential for pacing strategy before a 5K, 10K, half-marathon, or marathon.	Calculates how many grams of carbohydrates you need during a marathon or long race based on body weight, expected finish time, intensity, and weather. Use it during race planning to build your on-course nutrition strategy.