Running Tools
Free calculators and planners to help you train smarter and race faster — no account needed.
Pace Calculator
Turn a goal finish time into the exact splits you need to hit, for any race distance from the 5K to the marathon.
Open pace calculatorPace Chart
Convert between pace, speed, and finish times across every common race distance at a glance.
Open pace chartRoute Builder
Draw running routes on the map, snapped to roads and trails, with live distance and elevation as you build.
Open route builderMore from Kailo
- Race Predictor — predict your marathon time from your real training data.
- AI Coach — ask questions about your training and races in plain language.