Predict pace for every distance
from a single result
Enter one recent race and immediately move to target pace, split plan, and training intensity. Focus on execution, not spreadsheet setup.
Core Calculators & Tools
Use these first for day-to-day training decisions.
๐ Race Prediction
Project 5K to marathon goals and split pacing from one recent race result.
Calculator๐ Heart Rate Zones
Calculate Zone 1-5, MAF, and Karvonen outputs in one screen.
Converter๐งฎ Treadmill Conversion
Convert speed and pace instantly, including 400m split references.
Calculator๐ฅ Lactate Threshold
Map LT pace/HR to practical tempo and cruise workout intensity.
Supporting Resources
Use these pages to turn calculations into execution.
๐ About
See the product direction, update policy, and how each tool is designed.
๐ Running Guides
Use practical playbooks for Zone 2, tempo, intervals, fueling, and recovery.
๐๏ธ Gear Recommendations
Compare shoes, wearables, and fueling items by purpose and level.
๐๏ธ Marathon Schedule
Check major race dates and registration timing for Korea and global events.
Start with the core tools
Begin with race prediction, then layer HR zones and LT to finalize your training intensity.