About StrideForever
StrideForever is a small, independent project that builds free, accurate running calculators — the kind of tools you reach for when you want a quick, trustworthy answer without signing up for anything.
Why we built it
Most runners just want to answer a simple question: What pace do I need? What can I run off this race? How should I split it? Too many sites bury those answers behind accounts, paywalls, or clutter. StrideForever does the opposite — every tool runs instantly in your browser, with no sign-up and nothing to install.
What you'll find
Six focused calculators, each paired with a plain-English guide:
- Pace calculator — pace, speed and time from any two of them.
- Race time predictor — estimate a finish time from a recent race.
- Splits calculator — even or stepped splits for your goal time.
- Training pace zones — easy to repetition paces from a recent effort.
- Treadmill pace converter — match treadmill speed and incline to road pace.
- Age grading calculator — your WMA age-graded score and equivalent times.
You can browse them all on the calculators page, and read the guides to understand the numbers behind them.
Why you can trust the numbers
Accuracy is the whole point. Our age grading uses the official World Masters Athletics (WMA) age-factor tables, and our race predictions use the well-established Riegel formula. We explain the method behind each tool in its guide, so you can see exactly how a result is produced rather than taking it on faith.
Built for privacy and speed
Every calculation happens in your browser. We don't ask who you are, we don't store your inputs, and the site is a fast static build served from a global edge network. See our Privacy Policy for the details.
Available in three languages
StrideForever is published in English, Hungarian (Magyar) and German (Deutsch), so more runners can use the tools in their own language.
How it stays free
The site is supported by advertising and a few affiliate links to running gear — never by charging you. Our Affiliate Disclosure explains exactly how that works.
Say hello
Spotted an error, or have an idea for a tool? We'd genuinely like to hear it — head to the Contact page.