bitrate calculator obs

How to choose the right OBS bitrate

Picking the right bitrate in OBS is one of the biggest factors in stream quality. If your bitrate is too low, your stream gets blurry or blocky during motion. If it’s too high for your internet or platform limit, viewers see buffering and your stream may drop frames. A good bitrate balances image quality, stability, and platform rules.

This calculator gives you a practical starting point. It combines your chosen resolution/FPS with upload speed and platform caps, then suggests an OBS-friendly video bitrate.

Quick bitrate reference for OBS streaming

Resolution / FPS	Suggested Video Bitrate Range	Best Use Case
720p 30 FPS	2,500–4,000 kbps	Entry-level streaming, unstable internet
720p 60 FPS	3,500–5,500 kbps	Fast gameplay on tighter bandwidth
900p 60 FPS	5,000–7,000 kbps	Balanced quality/performance
1080p 30 FPS	4,500–7,000 kbps	Talk content and slower motion streams
1080p 60 FPS	6,000–9,000 kbps	Most popular gaming target
1440p 60 FPS	12,000–20,000 kbps	High-detail content (platform-dependent)

How this OBS bitrate calculator works

1) Base quality target

Each resolution/FPS pair has a typical bitrate target. For example, 1080p60 needs more data than 720p30 because there are many more pixels and frames to encode every second.

2) Platform cap

Your platform can enforce bitrate ceilings. Even if your connection can upload 20 Mbps, sending 12,000 kbps to a service capped at 6,000 kbps can create playback or ingest issues.

3) Real upload headroom

The calculator uses a safety margin (default 70% of measured upload speed). This prevents bandwidth spikes from causing dropped frames. It also subtracts audio bitrate before assigning final video bitrate.

Best OBS settings to pair with your bitrate

• Rate control: CBR for live streaming.
• Keyframe interval: Usually 2 seconds.
• Preset: Use a hardware preset that your GPU can handle without rendering lag.
• B-frames: 2 is a safe default for many workflows.
• Audio bitrate: 128–160 kbps AAC is typically enough for voice + game audio.

Streaming vs recording bitrate in OBS

Live streaming bitrate is restricted by platform and network stability. Local recording bitrate is mostly limited by storage and encoder power. For recording, many creators switch from CBR to quality-based modes (CQP/CRF) for better detail at similar file sizes.

Use the built-in file size estimator above when planning long sessions, podcasts, or event recordings.

Common bitrate mistakes (and fixes)

Setting bitrate equal to full upload speed

Never do this. You need headroom for game traffic, voice apps, browser tabs, and network fluctuations. Keep a safety margin.

Using 1080p60 on weak upload

If your recommended bitrate is low, reduce output resolution first, then FPS. A clean 720p60 often looks better than a smeared 1080p60 at too little bitrate.

Ignoring dropped frames in OBS stats

If dropped network frames rise, lower bitrate by 10–20%, enable dynamic bitrate, or use a closer ingest server.

FAQ

What bitrate should I use for Twitch 1080p60?

Most streamers use around 6,000 kbps video with 128 kbps audio due to common Twitch constraints. If transcoding is limited for your viewers, consider 936p or 900p for better compatibility.

Is higher bitrate always better?

Only when your platform, encoder, and viewers can handle it. Past a certain point, gains are small compared to proper resolution/FPS matching and good encoder settings.

Should I prioritize FPS or resolution?

For competitive games, prioritize FPS (smooth motion). For slower content and tutorials, higher resolution can be more valuable.

Final recommendation

Start with the calculator result, run a private test stream for 10–15 minutes, and watch OBS stats carefully. If you see dropped frames, lower bitrate. If stream is stable and visually soft, increase bitrate gradually or tune your encoder preset. Small, measured adjustments beat one giant settings change every time.