Free Running Tools

Calculate pace, predict race times, find your training zones, and more. All free. No signup needed.

Convert pace between min/mile and min/km. Calculate race finish times from your pace.

Predict your finish time for any race distance based on a recent race result.

Calculate your training pace zones based on threshold pace or recent race time.

Want to sync workouts to your smartwatch?

Paicer uses AI to parse any workout image and sync it directly to your smartwatch. No more manual data entry.