Ultrarunning Calculators & Planning Tools

Free interactive tools to help you plan, prepare, and execute your multiday race.

Pace a timed race

Timed-Race Pace Calculator

Calculate overall and moving pace, hourly targets, lap counts, and printable splits for 24-hour, 48-hour, and 6-day events.

Try 120 km, 24 hours, and 120 stopped minutes to see moving pace and lap targets.

Plan hourly loops

Convert yards to distance, calculate loop pace and rest time, and build a printable hourly schedule.

Try a 50-minute yard: compare the resulting 10-minute base window with a slower loop.

Check a fixed-distance route

Plan checkpoint ETAs, aid-station stops, cutoff buffers, and a printable race pace band.

Enter checkpoint distances, cutoff times, and planned stops to identify small buffers.

Compare movement patterns

Calculate true combined interval pace, projected finish time, and timed-event distance.

Enter your run and walk intervals and their separate paces to see the combined pace.

Organize support

Build a printable operations sheet for crew points, arrival windows, bags, staged items, and actions.

Add a crew point, arrival window, bag, and actions to create a printable handoff sheet.

Choose an event

Filter the verified event directory and compare up to three races across course, cutoff, terrain, and support.

Select a format and region, then compare up to three matching races side by side.

Pack for the format

Generate a printable gear checklist customized for your event type — 24-hour, backyard ultra, 6-day, or stage race.

Choose your event type to create a checklist you can adapt and print.