Train smarter.
Run stronger.
trnr is the all-in-one training companion for runners, triathletes, and endurance athletes. Free calculators, ready-to-use plans, and form analysis — no account required to start.
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Free, no signup required
Tools every runner needs
Six free calculators and guides, available to anyone. Use them as much as you like.
Pace Calculator
Convert between pace, time, and distance across runs, bikes, and swims. Built-in race distance presets.
VDOT Calculator
Plug in a recent race time, get equivalent times at every distance plus your easy, tempo, interval, and repetition paces.
What to Wear
Live weather + body-feel + UV adjustments to dial in your kit. From base layers in 10°F to sun shirts in 90°F.
Training Plans
Free programs for 5K, marathon, triathlon, strength, cycling, and swimming. Hal Higdon, Pfitzinger, Hanson's and more.
Nutrition Planner
Build your race-day fueling plan with real-world gels, drinks, and chews. See carb and sodium totals at a glance.
Heart Rate Zones
Karvonen and %HRmax calculators plus a guide to what each zone actually does for your fitness.
With a free account
The full training stack
Sign up to save plans, sync your watch, log workouts, and track progress over time.
AI training plans
Tell us your goal race and current fitness. Get a personalized week-by-week plan that adapts as you train.
Stride analysis
Upload a side-view running video. We use pose estimation to grade your form and suggest corrective exercises.
Activity sync
Connect Strava, Garmin, COROS, or Apple HealthKit. Every run, ride, swim, and lift in one place.
Smart calendar
See your plan, your logged workouts, and your race countdown in one view. Reschedule by drag and drop.
Personal records
We watch your activities for PRs and milestones automatically. No spreadsheet required.
Progress charts
Fitness, fatigue, training load, aerobic decoupling. The metrics that actually tell you how training is going.
Routes & maps
Track your favorite loops, see elevation profiles, and discover new routes near you.
Community
Follow training partners, share workouts, and cheer each other on. Or keep it private — your call.
Ready to start training?
Create a free account and get a personalized plan in under a minute.