Why I built it When I looked for triathlon and running pace calculators online, I kept landing on the same type of pages: walls of form fields, long explanations, tables everywhere, and half the screen taken by ads or unrelated content. They technically work, but they feel more like old-school calculators bolted onto a blog than tools you’d actually want to use the week before your race. I didn’t want to scroll through paragraphs of text just to do a few simple “what if” checks. The project has two main parts, both designed to be fast and visually simple: Triathlon race planner – Set your race distances and target finish time. – Enter swim pace, bike speed, run pace, and transitions. – Immediately see your splits and total time — no extra dropdowns, no multi-step wizard. – Tweak a few numbers and watch your plan update in real time, instead of juggling three different calculators. Running pace calculator – Plan standalone 5K, 10K, half, marathon, or custom races in a single, clean view. – Convert between pace, distance, and finish time without being dumped into a massive multipurpose calculator page. – Built to open on your phone, plug in two numbers, and be done in a few seconds.

Triathlon Race Planner & Pace Calculator

Plan your swim, bike, run — and hit your target time

Plan your swim, bike, run — and hit your target time