# Reachability score calculation method

**URL:** https://ask.openrouteservice.org/t/reachability-score-calculation-method/124
**Category:** openrouteservice
**Created:** [December 8, 2018, 1:49pm UTC](https://ask.openrouteservice.org/t/reachability-score-calculation-method/124 "2018-12-08T13:49:52Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![levi](https://ask.openrouteservice.org/letter_avatar_proxy/v4/letter/l/ce73a5/32.png) [@levi](https://ask.openrouteservice.org/u/levi)
#### Post date: [December 8, 2018, 1:49pm UTC](https://ask.openrouteservice.org/t/reachability-score-calculation-method/124/1 "2018-12-08T13:49:52Z")

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Hi all,

Does anyone know how the reachability score is calculated when pulling isochrones? Like what is the methodology behind it, what factors affect it and how?

Thanks,  
Levi

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### Author: ![amandus](https://ask.openrouteservice.org/user_avatar/ask.openrouteservice.org/amandus/32/669_2.png) [@amandus](https://ask.openrouteservice.org/u/amandus)
#### Post date: [December 8, 2018, 11:22pm UTC](https://ask.openrouteservice.org/t/reachability-score-calculation-method/124/2 "2018-12-08T23:22:22Z")

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Hi Levi,

in our _API Playground_ we offer some insights on the response parameters for Directions, Isochrones and Matrix. You can take a look if you switch to the _Responses_ Tab of the endpoint (1.) and click the **?** Help button for the 200 Response. Maybe this will help you a bit.

 ![Isochrones_Responses](https://ask.openrouteservice.org/uploads/default/original/1X/6d82f6b9baa45f0747a66bcd45fff30251ebc596.jpeg)