EnduroCalc

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.