Streaming Bitrate Calculator

How to Use This Tool

1. Enter your encoded video bitrate in Mbps.
2. Enter the audio bitrate in kbps from the encoder settings.
3. Choose an additional margin, or leave it at 0% to show the combined media rate.

Start with the Feed Your Encoder Sends

This calculator budgets upload capacity for an entered outgoing stream. It adds video and audio rates, then shows the effect of a chosen additional margin. Start with the settings of the feed being sent to the service. A playback speed recommendation concerns receiving media and cannot be substituted automatically for the encoder's outgoing rate.

The form does not select a platform, resolution, frame rate or codec. Those choices determine which settings are supported and which quality is practical. Select them using current platform guidance and the encoder's capabilities, then use the calculator to make the resulting rate budget explicit. A larger numerical result does not independently establish a better picture or an approved platform configuration.

Check Video and Audio Units Separately

The video field uses Mbps; the audio field uses kbps. An encoder value of 4,250 kbps video therefore belongs in the video field as 4.25 Mbps. Entering 4,250 there would create a thousandfold error. Decimal bits per second are used in both fields. They are not MB/s, the byte-rate unit often displayed during file downloads.

Audio bitrate describes encoded data per second. It differs from sample rate, channel count and microphone gain. A 48 kHz sample-rate setting is not an audio bitrate of 48 kbps. Read the encoder's actual bitrate setting and include only the audio carried in the feed being modelled. An aggregate rate already containing audio should not have the same audio added a second time.

• Convert bit rates and file-transfer byte rates

Follow a Complete Numerical Example

A hypothetical video feed at 4.25 Mbps with audio at 160 kbps contains 4.41 Mbps of combined media: 160 divided by 1,000 is 0.16, then 4.25 plus 0.16 gives 4.41. Choosing a 25% additional margin adds 1.1025 Mbps. The planned upload capacity is 5.5125 Mbps. These values are arithmetic assumptions, not a named platform's recommended preset.

The three results serve different purposes. Combined audio and video is the entered media total. Additional capacity is the amount added by your percentage. Planned upload capacity is their sum. At zero margin, the planned result equals the media total. That does not mean real delivery has no protocol traffic, rate variation or other work sharing the connection.

An Added Margin Is Not a Reserved Share

Adding 25% of media rate differs from keeping 25% of total connection capacity unused. In the example, the added 1.1025 Mbps is 20% of the resulting 5.5125 Mbps plan. To reserve 25% of total capacity for other uses, the separate calculation would be 4.41 divided by 0.75, giving 5.88 Mbps. The form implements the first meaning, not the second.

Choose a margin for a stated planning reason rather than treating it as measured overhead. Other applications, changing throughput and the intended test conditions can inform that decision. No universal percentage guarantees a stable broadcast. The margin neither changes the encoder setting nor allocates router bandwidth. It also does not repair delay, loss or a service restriction just because the result becomes larger.

Check the Current Platform Mode

Requirements can differ by codec, resolution, frame rate, account features and broadcasting mode. YouTube's current encoder guidance, checked on 9 October 2026, separates AV1/H.265 and H.264 recommendations. Keep that distinction when reading a bitrate table. A recommendation is not automatically a hard platform ceiling, and a minimum is not a promise about picture quality for every scene.

Twitch's June 2026 Enhanced Broadcasting announcement also describes multiple locally encoded variants. A statement that every Twitch stream has one universal bitrate cap is unsuitable for all current modes. Check the supported configuration for the actual account and software. This page links the primary guidance rather than copying competitor presets into a form that has no platform-selection control.

Count Actual Outgoing Feeds

Several direct uploads can use more local capacity than one feed distributed by a cloud relay. For a hypothetical 3 Mbps video plus 96 kbps audio, one feed totals 3.096 Mbps before a margin. Sending two such feeds directly totals 6.192 Mbps. Sending one feed to a relay has a different local budget; the relay's later distribution is a separate part of the path.

A single destination can also receive multiple locally encoded variants. Count what is actually transmitted, not just the number of platform names. Run separate calculations for distinct feeds and add the required upload capacities consistently. Viewer count is not automatically another multiplier for a creator sending one feed to a hosted service. Self-hosted delivery requires its own distribution model.

• Budget simultaneous broadcasts and calls on one connection

Verify Delivery and Estimate Duration Separately

Test the actual encoder, connection and ingest destination with representative movement and audio. Observe the encoder's reported network drops and platform stream-health messages. Encoding or rendering delays are different observations from network delivery problems. A speed test to another endpoint is useful context, but cannot prove the chosen broadcast path will sustain the configured feed throughout an event.

This form has no duration field and does not return data consumption. A constant combined media rate of 4.41 Mbps for one hour corresponds to 1.9845 decimal GB before traffic not included in that rate. A planning margin does not automatically become transmitted media bytes. Use the data calculator with a suitable counted average for allowance planning, or the video-size calculator for a recording's entered rates and duration.

• Estimate data from average traffic and active hours
• Estimate a recording from its video and audio rates

What the Result Means

Codec, resolution, frame rate and platform limits still matter. Sustained upload capacity and network stability need a separate real test. One calculation covers one outgoing stream.

Common Questions