Free endurance training calculators, powered by a real coaching engine.
Predict your race, find your zones, score your sessions, and plan your taper — using the exact sports-science math that builds and adapts PaceBeats training plans. No account, no paywall, no fluff.
Most popular
Race Time Predictor
Predict your finish time and per-leg splits from your real thresholds.
CSS Calculator
Find your CSS from a 400/200 time trial and get five swim pace zones.
TSS Calculator
Score any swim, bike, run, or strength session in one place.
Fitness, Fatigue & Form
Turn 12 weeks of TSS into your fitness, fatigue, and form curve.
Training Zones
Turn one threshold into bike, run, swim, and heart-rate zones.
Training Hours Check
See whether your weekly hours can actually get you race-ready for your distance.
Race day
Training load
Zones & thresholds
Swim
Planning
From tools to a plan
These numbers are the inputs. PaceBeats builds the plan.
The same engine behind these calculators turns your history, thresholds, and race into an adaptive training plan — in your sport, or all four — and reworks it every week as your data changes.