---
title: "Running tools · Marathon.tj"
description: "Free running tools from the association: pace, race predictor, heart-rate zones and mountain finish estimates."
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> Index of every page on this site: [llms.txt](https://marathon.tj/llms.txt)

**Tools**

# Running tools

Pace, race predictions, heart-rate zones and mountain finish estimates — free, in the browser, with named formulas.

- [<h2>Marathon pace calculator</h2>

  Finish time ↔ pace and kilometre splits.Open](https://marathon.tj/en/tools/pace)
- [<h2>Race predictor</h2>

  One recent race → times at other distances and Daniels training paces.Open](https://marathon.tj/en/tools/predict)
- [<h2>Heart-rate zones</h2>

  Five heart-rate zones from age and resting pulse.Open](https://marathon.tj/en/tools/hr-zones)
- [<h2>Mountain finish</h2>

  Add elevation gain to estimate time on courses like Seven Lakes.Open](https://marathon.tj/en/tools/mountain)

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```

## Sitemap

See the full [sitemap](https://marathon.tj/sitemap.md) for all pages.