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Estimating Bandwidth Usage for Webinars: A Practical Guide
Estimating Bandwidth Usage for Webinars: A Practical Guide
Dmitry Skavish avatar
Written by Dmitry Skavish
Updated over a week ago

Have you ever wondered about the bandwidth consumption of hosting a webinar? Accurate bandwidth estimation is essential for a seamless streaming experience, ensuring that both you and your attendees can enjoy your content without interruptions.

In this guide, we'll dive into how to calculate bandwidth usage for a 60-minute webinar with 1000 attendees and clarify that for non-webinar streams, there is no additional bandwidth consumption.

Understanding Bandwidth Consumption for Webinars

Calculating the bandwidth consumption of a webinar involves considering factors like video quality, bitrate, and the number of attendees. For a standard HD (1080p) webinar stream, a rough estimate is that a 60-minute session would use approximately 1.5GB of bandwidth per attendee if they watch the entire webinar from start to finish.

Calculating Bandwidth for 1000 Attendees

For instance, let's say you're hosting a 60-minute HD webinar and have 1000 attendees joining the event. To calculate the total bandwidth consumption:

  1. Bandwidth per Attendee: 1.5GB (for a 60-minute HD webinar)

  2. Total Bandwidth Consumption: 1.5GB x 1000 attendees = 1500GB (or 1.5TB)

Managing Bandwidth and Costs

For users who have bandwidth limits, understanding the potential impact on your data usage is crucial. If your webinar hosting plan includes 500GB of bandwidth (Business Plan), consider that hosting a single HD webinar with 1000 attendees might result in an overage of 1000GB (1TB).

Billing for Overage

In our pricing structure, we charge $0.01 per GB for overages. This means that if you exceed your plan's bandwidth allocation, the additional 1TB of usage would incur a charge of $0.01 x 1000GB = $10.

Clarification for Non-Webinar Streams

It's important to note that for non-webinar streams on platforms like Facebook, YouTube, LinkedIn, and Twitch, there is no additional bandwidth usage. Viewers access these streams directly from their respective platforms, and your hosting service does not impact their data consumption.

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