Performance Calculators

These calculators help you quickly translate key performance metrics across running, cycling, and swimming—so you can stop guessing and start training with precision. Whether you’re setting workout targets, dialling in race pacing, or adjusting for treadmill or indoor sessions, everything becomes simpler and more consistent.

You’ll also find a dedicated nutrition fuel calculator designed to help you understand your session demands—covering hydration, carbohydrates, sodium, and overall fuelling needs based on duration, intensity, environment, and sweat rate.

Built for endurance athletes who want less complexity and more clarity, these tools make planning your training and fuelling feel practical, fast, and easy to apply.

Run Pace Calculator

Calculate run distance, pace, duration, and speed in km, miles, min/km, min/mile, km/h, and mph.

Calculate Duration Minutes or H:MM:SS Distance Example: 10, 21.1, 42.2 Distance Unit Pace Format: MM:SS per km or mile Pace Unit

Bike Speed & Power Calculator

Calculate bike distance, speed, duration, estimated watts, and % FTP.

Calculate Duration Minutes or H:MM:SS Distance Example: 40, 90, 180 Distance Unit Speed Example: 30 km/h or 18.6 mph Speed Unit Body Weight (kg) Used for power estimate Bike Position Changes aerodynamic estimate FTP (watts) — Optional Used to estimate % FTP

Swim Pace Calculator

Calculate swim distance, pace, duration, and pool lengths in metres, yards, and kilometres.

Calculate Duration Minutes or H:MM:SS Distance Example: 750, 1500, 1900, 3800 Distance Unit Pace Format: MM:SS per 100 Pace Unit Pool Length Used for length/lap count

Session Fuel Calculator

Estimate carbs, fluid, sodium, caffeine, and what to bring for your next endurance session.

Session Type Duration (minutes) Fueling Target Temperature Sweat & Sodium Loss Environment Weight Optional Weight Unit Primary Hydration Secondary Hydration Optional Primary Fuel Secondary Fuel Optional Electrolyte Source Optional

Race Split Calculator

Build your race-day equation. Set a goal time, enter known splits, and see the pacing, tradeoffs, and performance context.

Race Distance Calculate Goal Finish Time Format: H:MM:SS Swim Pace Per 100m Bike Speed km/h Run Time Format: H:MM:SS Transition Estimate Total Transition Time T1 + T2 combined

Coffee for the Long Run

Endurance sports and coffee seem to go hand in hand. If you find value in these free calculators, consider supporting the project with a coffee from our family-run roastery, The Coffee Tree Roastery

Run Pace

Bike Speed & Power

Swim Pace

Nutrition Fuel

Race Splits