How do I estimate video file size before recording or rendering?

Select video resolution (4K, 1080p, 720p), frame rate (24, 30, 60 FPS), codec (H.264, H.265/HEVC, ProRes, AV1), and duration to calculate estimated file size in MB and GB.

How much storage does 1 hour of 1080p video take?

At standard H.264 bitrate (8 Mbps), 1 hour of 1080p video takes approximately 3.6 GB. In H.265 (HEVC), it takes about 1.8 GB.

How much storage does 4K ProRes 422 video take?

4K ProRes 422 at 60 FPS requires approximately 110 GB to 150 GB per hour of footage.

Can I estimate required memory card capacity for video shoots?

Yes. Calculate how many hours of recording will fit on a 64GB, 128GB, or 256GB SD card.

Does audio bitrate factor into the total size?

Yes. Audio channel count and bitrates are included in the calculation.

Are estimates based on real-world codec profiles?

Yes. Equations reflect official bitrate specifications for broadcast and web codecs.

NexLove Calculator

Video File Size Estimator

Estimate video file sizes before recording or rendering. Input video duration, bitrate, resolution (4K, 1080p, 720p), and audio channels to calculate output storage needs in MB and GB.

TL;DR: Video File Size Estimator is a 100% free browser-based calculator utility. Estimate video file size from duration and bitrate before recording or rendering.

Duration (minutes)

Video Bitrate (Mbps)

Understanding Video File Size Estimator

Estimate video file sizes before recording or rendering. Input video duration, bitrate, resolution (4K, 1080p, 720p), and audio channels to calculate output storage needs in MB and GB. Designed for creators, video editors, audio engineers, web designers, and developers who need instant, high-precision processing without software installation, watermarks, or file uploads.

Mathematical Formula & Technical Methodology

\text{File Size (MB)} = \frac{(\text{Video Bitrate} + \text{Audio Bitrate}) \times \text{Duration (s)}}{8192}

Formula Variables Explained:
Multiplies total bitrate stream data rate by playback duration.

Step-by-Step Worked Example

A 10-minute (600s) 1080p video at 8,000 kbps equals approximately 595 MB.

100% Client-Side Privacy Guarantee

All media decoding, manipulation, calculations, and encoding execute locally inside your web browser using HTML5 Canvas, Web Audio API, WebCodecs, Web Crypto, and modern JavaScript engines. Zero server uploads, zero telemetry, and no registration required.

Frequently Asked Questions

: Select video resolution (4K, 1080p, 720p), frame rate (24, 30, 60 FPS), codec (H.264, H.265/HEVC, ProRes, AV1), and duration to calculate estimated file size in MB and GB.
: At standard H.264 bitrate (8 Mbps), 1 hour of 1080p video takes approximately 3.6 GB. In H.265 (HEVC), it takes about 1.8 GB.
: 4K ProRes 422 at 60 FPS requires approximately 110 GB to 150 GB per hour of footage.
: Yes. Calculate how many hours of recording will fit on a 64GB, 128GB, or 256GB SD card.
: Yes. Audio channel count and bitrates are included in the calculation.
: Yes. Equations reflect official bitrate specifications for broadcast and web codecs.

Embed This Tool

Add the live Video File Size Estimator to your own website with this embed code:

<iframe src="https://nexlove.org/embed/video-file-size-estimator.html" width="100%" height="650" style="border:1px solid #e2e8f0;border-radius:12px" title="Video File Size Estimator — NexLove" loading="lazy"></iframe>

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