Every running number
you'll ever need

Pace calculator Most used Enter any two of distance, time, or pace — get the third plus per-km splits. Open → Marathon pace chart At a glance The pace you need for sub-3, sub-4, sub-5 and every split, in one table. Open → Race predictor Turn today's 5K into a realistic half and full marathon time. Open → VO2max · VDOT Jack Daniels Get your VDOT from a race time and the target pace for each training zone. Open → Heart-rate zones Zones 1–5 from max HR or heart-rate reserve. Open → Calorie calculator Calories burned from your weight, distance and speed. Open → Weight change Project your weight over time if you keep this running load. Open → Heat pace adjust Summer How much to slow down for today's heat and humidity. Open → Cadence calculator Find an efficient rhythm from your stride length and cadence. Open →

Training plan Recommended Enter your goal race and weeks left to get a weekly plan. Open → Build-up training Grow weekly mileage safely with the 10% rule. Open → Interval training Yasso 800s, Tabata and Norwegian 4x4, scaled to your times. Open → Voice guided run Put in earphones and let the voice guide your pace and splits. Open → Shoe matcher A few questions to find the shoe type that fits your stride. Open →

Weather by region See where it's good to run right now on one national map. Open → RunningGu weather Dashboard Temperature, dust, wind and UV rolled into today's running index. Open →

Running guide Beginner The official doc for new runners — just read it in order. Open → Running tips Short, practical reads on injury prevention, warm-ups and breathing. Open →