EnduroCalc vs RunSolver

Plan every training session and race day with EnduroCalc — the minimalist, ad-free calculator built for runners, cyclists, swimmers and triathletes. From your next half marathon to a long-distance triathlon, EnduroCalc helps you hit your target time, dial in your pace and fuel your race with confidence. NEW: CONNECT WITH STRAVA Bring your training history straight into EnduroCalc. Import your personal bests and see your equipment usage – bikes, shoes and more – so your plans are based on real data. (The Strava connection is rolling out gradually and may not be available to everyone just yet.) NEW: RACE MANAGER Add your upcoming races, plan your target splits and nutrition strategy, then analyze how the day actually went using your Strava data. Your entire season, planned and reviewed in one place. FLEXIBLE PACE CALCULATORS - Find the pace you need to hit any target time - Switch between min/km, min/mi, min/100 m, km/h and mph TRIATHLON MODE - Calculate each leg or your full triathlon time - Built-in templates for sprint, Olympic, 70.3 and full distance - Add transition times and a target finish CSS CALCULATOR FOR SWIMMERS - Find your Critical Swim Speed from two swim times - Visual training zones from recovery to VO₂max - Automatic history to track your progress SMART CARB CALCULATOR - Get your individual carbohydrate needs for endurance events - Build a personalized fueling plan, triathlon included - Pick your products – gels, bottles, bars – and export as PDF A FRESH, SPORTY DESIGN We've completely rebuilt the look and feel: cleaner, faster and more focused, with a sport-specific design language made for athletes. MINIMALIST. CLEAR. AD-FREE. No ads. No clutter. Just the numbers that matter. Built by endurance athletes, for endurance athletes.

RunSolver is the runner's toolkit — built for calculating, not tracking. Whether you're planning a race, dialing in your splits, or predicting a finish time, RunSolver gives you fast, focused tools that work together. Enter your distance and time once, and every screen updates — pace, splits, predictions, and workouts all stay in sync. PACE CALCULATOR Pick a distance or enter your own, set a finish time, and instantly see your pace, speed, and converted units. Clean, simple, no clutter. SPLIT GENERATOR Generate per-km or per-mile splits with even, negative, or positive split strategies. Visualize your pace curve and share a race card image with friends. RACE PREDICTOR Use the Riegel formula to predict finish times across distances — from the mile to 50K. Adjust for fitness level and see your age grade percentage. WORKOUT BUILDER Choose from smart templates (intervals, tempo, long run, speed work) with paces derived from your target race time. Or build a fully custom workout and save it for later. TOOLS - Pace conversion (min/km to min/mi and back) - Training pace zones from your threshold - Treadmill speed to outdoor pace - Boston Qualifier calculator - Race comparison (planned vs actual) - Personal records tracker DESIGNED FOR RUNNERS - Dark theme, clean interface - Wheel pickers for fast time entry - km/mi toggle everywhere - Shareable race plan cards - All calculations happen instantly — no loading, no accounts, no tracking RunSolver is 100% free with no ads. Run the numbers.