Bitrate and file size, both ways.
Know what size your export will be before you render, or the exact bitrate that fits a limit like Discord's 20 MB. Audio is included and every platform limit is checked.
Estimated file size
62.1 MB
59.2 MiB (what Windows shows as MB) · 8,192 kbps total · includes ~1% MP4 overhead
- Discord: over Free 20 MB, Nitro Basic 50 MB, Server Boost Level 2 (in that server) 50 MB (fits Nitro, Server Boost Level 3 (in that server)). Limits
- WhatsApp chat: over Sent as media (older pages say 16 MB) 16 MB (fits Sent as media (desktop help), Sent as a document). Limits
- ShareChat: over 50 MB. Limits
Longest clip at this bitrate
- Instagram Reels (300 MB)4:50
- Instagram Stories (100 MB)1:37
- Instagram feed video (4 GB)1:04:28
- Facebook feed video (4 GB)1:04:28
- TikTok (4 GB)1:04:28
- X (Twitter) (512 MB)8:15
- Pinterest video Pins (2 GB)32:14
- Threads (1 GB)16:07
- Bluesky (300 MB)4:50
- Dailymotion (4 GB)1:04:28
- Discord (20 MB)0:19
- WhatsApp chat (16 MB)0:15
Need the full settings for your editor? Use the export settings generator or browse settings by app and platform.
Shinel Studios
Rather send the footage and get upload-ready edits back?
Our editors cut, caption, colour and export to each platform's spec, with 2 revision rounds. Shorts come back in 48-72 hours, long videos in 5-10 days.
Frequently asked questions
How do I work out a video's file size from its bitrate?
Add the video and audio bitrates (in kilobits per second), multiply by the length in seconds, divide by 8 to get kilobytes, then by 1,000 for megabytes. 8 Mbps video plus 384 kbps audio for 10 minutes is (8,000 + 384) x 600 / 8 / 1,000 = about 629 MB, plus around 1% for the MP4 container.
What bitrate do I need to fit a video under 20 MB for Discord?
Divide the size by the length: 20 MB is 160,000 kilobits, so a 30-second clip can use about 5,300 kbps in total. Take off the audio (for example 128 kbps) and leave a few percent of headroom: export the video at roughly 5,000 kbps with 2-pass encoding. Put your own numbers into the calculator above.
Why is my file bigger than the calculator says?
Single-pass VBR overshoots on busy scenes, and some apps add more audio or a higher bitrate than you set. Use 2-pass (or a constrained maximum) when a size limit matters, and keep the headroom setting at 3-5%.
MB or MiB: which do platforms mean?
Platforms quote megabytes, and this calculator uses 1 MB = 1,000,000 bytes, which is the stricter reading for a limit. Windows shows sizes in MiB (1,048,576 bytes) but labels them MB, so a '20 MB' file in File Explorer is about 21 MB here.
Is this calculator free?
Yes. It runs entirely in your browser.
More Free Creator Tools
Free Channel Audit
Score your last 20 uploads and get 3 fixes in 60 seconds.
Discord Server Planner
Channels and roles for your community, ready to copy.
Video to GIF
Small, sharp GIFs from any video. Nothing uploads.
Video Compressor
Fit Discord, WhatsApp or email limits, in your browser.
GIF Compressor
Shrink a GIF, or turn it into a tiny MP4.
YouTube Title Generator
High-CTR title ideas from proven click formulas.
YouTube Tag Generator
Focused SEO tags — primary, long-tail, related.
Word Counter
Words, characters and speaking time for scripts.