Free running calculators for your website

Running club, coach, race organiser or blogger? Give your visitors a pace calculator or race time predictor on your own site. Copy the snippet, paste it into your page, done.

✓ Free, no sign-up
✓ No ads, no tracking cookies
✓ Works on mobile, km and miles

Running pace calculator

Distance + finish time → pace per km or mile and speed.

Embed code

<iframe src="https://athleticfly.com/embed/pace-calculator" title="Running pace calculator" width="100%" height="700" style="border:0;max-width:680px" loading="lazy"></iframe>
<p style="font-size:13px;margin:4px 0 0"><a href="https://athleticfly.com/pace-calculator">Running pace calculator</a> by Athleticfly</p>
<script>addEventListener("message",function(e){if(e.origin!=="https://athleticfly.com"||!e.data||!e.data.afHeight)return;document.querySelectorAll('iframe[src^="https://athleticfly.com/embed/"]').forEach(function(f){if(f.contentWindow===e.source)f.style.height=e.data.afHeight+"px"})})</script>

Race time predictor

A recent race → predicted times for 5K, 10K, half and marathon (Riegel formula).

Embed code

<iframe src="https://athleticfly.com/embed/race-time-predictor" title="Race time predictor" width="100%" height="640" style="border:0;max-width:680px" loading="lazy"></iframe>
<p style="font-size:13px;margin:4px 0 0"><a href="https://athleticfly.com/race-time-predictor">Race time predictor</a> by Athleticfly</p>
<script>addEventListener("message",function(e){if(e.origin!=="https://athleticfly.com"||!e.data||!e.data.afHeight)return;document.querySelectorAll('iframe[src^="https://athleticfly.com/embed/"]').forEach(function(f){if(f.contentWindow===e.source)f.style.height=e.data.afHeight+"px"})})</script>

Questions

WordPress?Add a “Custom HTML” block and paste the snippet. Squarespace, Wix and Webflow all have an equivalent “Embed” or “Code” block.

Can I change the height? Yes, edit the height value in the snippet.

Something not working? Write to [email protected].