---
title: Bandwidth measurement · Cloudflare Magic Transit docs
description: Cloudflare measures Magic Transit usage based on the 95th
  percentile of clean bandwidth for your network. "Clean bandwidth" refers to
  the egress traffic routed to your network after all DDoS mitigation and
  firewall functions are applied. The usage measurement explicitly excludes
  attack traffic blocked at Cloudflare's global network.
lastUpdated: 2025-07-18T10:46:10.000Z
chatbotDeprioritize: false
source_url:
  html: https://developers.cloudflare.com/magic-transit/reference/bandwidth-measurement/
  md: https://developers.cloudflare.com/magic-transit/reference/bandwidth-measurement/index.md
---

Cloudflare measures Magic Transit usage based on the 95th percentile of clean bandwidth for your network. "Clean bandwidth" refers to the egress traffic routed to your network after all DDoS mitigation and firewall functions are applied. The usage measurement explicitly excludes attack traffic blocked at Cloudflare's global network.

To measure 95th percentile bandwidth, Cloudflare records clean bandwidth leaving our global network at five minute intervals, sorts these measurements in descending order, and discards the top 5% of recorded measurements. The highest remaining value constitutes the 95th percentile bandwidth measurement for that time period.
