OBS Bitrate Calculator
Use this tool to estimate a stable video bitrate for OBS based on your upload speed, platform limits, and stream quality settings.
What is an OBS bitrate calculator?
An OBS bitrate calculator helps you choose the right streaming bitrate so your stream looks good and stays stable. In simple terms, bitrate is how much video data you send every second. If it is too low, your stream looks blurry or blocky. If it is too high, viewers may buffer and you may see dropped frames in OBS.
The best bitrate depends on several factors: your upload speed, your target resolution (like 720p or 1080p), frame rate (30 or 60 FPS), streaming platform limits, and encoder efficiency (x264, NVENC, AV1, and more). This calculator combines those factors into a practical recommendation you can plug directly into OBS Studio.
Quick bitrate rules for OBS streaming
- Always leave upload headroom: do not use your full upload speed for stream bitrate.
- Match bitrate to FPS: 60 FPS usually needs more bitrate than 30 FPS.
- Respect platform caps: Twitch and other platforms have practical upper limits.
- Use CBR for most live platforms: constant bitrate is easier for ingest servers.
- Set keyframe interval to 2 seconds: this is a common requirement for compatibility.
How this bitrate calculator works
The calculator starts with a recommended quality profile based on resolution and frame rate. It then adjusts for encoder type, because some encoders can deliver similar visual quality at slightly lower bitrates. After that, it applies two hard limits:
- Your available upload budget after safety margin and audio bitrate.
- Your selected platform bitrate cap.
Final recommendation = the highest safe bitrate that does not exceed either limit. You also get a range (low-high), a target value, and usage estimates for data per hour.
Input fields explained
- Platform: applies maximum bitrate guidance for Twitch, YouTube, Facebook, Kick, or custom.
- Resolution / FPS: sets your baseline quality needs.
- Encoder: adjusts bitrate expectation for compression efficiency.
- Upload speed: real-world internet bandwidth available for upload.
- Audio bitrate: reserved bandwidth for microphone + game audio.
- Safety margin: extra network cushion to absorb congestion and spikes.
Recommended OBS settings after calculating bitrate
Video tab
- Base (Canvas) Resolution: your monitor or game capture resolution.
- Output (Scaled) Resolution: match the target you selected (720p, 1080p, etc.).
- Common FPS Values: 30 or 60 based on your chosen profile.
Output tab (Streaming)
- Rate Control: CBR (recommended for most live platforms)
- Bitrate: use the calculator target value
- Keyframe Interval: 2
- Preset: quality/performance preset based on your system headroom
Common mistakes that cause poor stream quality
- Setting bitrate higher than internet upload can sustain.
- Using 1080p60 with very limited upload speed.
- Ignoring encoder overload warnings in OBS stats.
- Running high CPU game + x264 medium preset on the same machine.
- Forgetting to retest bitrate after changing ISP/router/network conditions.
Streaming bitrate vs recording bitrate
Streaming bitrate is constrained by internet upload and platform limits. Recording bitrate is local and mainly constrained by disk speed and storage capacity. For local recordings, many creators use higher quality settings (often CQP/CRF style quality controls) because there is no live upload bottleneck.
So if your stream must be conservative (for stability), you can still keep high-quality local recordings for editing and highlights.
FAQ
What bitrate should I use for 1080p60 on Twitch?
Twitch streamers commonly target near the platform cap, but the exact safe value depends on your upload speed and stability. If your internet fluctuates, a slightly lower bitrate is often more reliable than maxing out.
Is higher bitrate always better?
Not always. Past a point, gains are small, and instability risk increases. A stable stream at slightly lower bitrate usually looks better to viewers than a high bitrate stream with buffering or dropped frames.
Should I prioritize 60 FPS or higher resolution?
For fast games (FPS, racing), 60 FPS often improves perceived quality more than extra resolution. For slower content (talking head, strategy), 30 FPS at cleaner image quality can be perfectly fine.
Final tips
Re-check your settings every few months, especially after hardware upgrades, OBS updates, or internet plan changes. Use the OBS stats window during test streams and aim for zero dropped network frames. With the calculator above, you can quickly dial in a bitrate that balances visual quality and reliability.