Free triathlon 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 swim, bike, run, and strength plan — and reworks it every week as your data changes.