Frame Rate Converter

Video frame rate describes how many individual still images (frames) are captured or displayed per second. It directly affects the motion feel of your footage and has a massive impact on file sizes and storage requirements.

Core formulas: File Size per Second = Frame Width × Frame Height × Bit Depth × Frame Rate ÷ 8 ÷ 1,000,000 (Result in MB/s before compression)

Compressed File Size = Duration × Bitrate ÷ 8 (Where Bitrate is in Mbps and Duration is in seconds — result in MB)

Total Storage = File Size per Second × Total Recording Duration

What each variable means:

• Frame Rate (fps) — frames per second. Common values: 24, 25, 30, 60, 120, 240.
• Frame Width × Height — resolution in pixels (e.g., 3840 × 2160 for 4K UHD).
• Bit Depth — color information per channel. 8-bit = 24 bits/pixel, 10-bit = 30 bits/pixel.
• Bitrate — the amount of data recorded per second after codec compression (H.264, H.265, ProRes).
• Compression ratio — modern codecs compress raw data by 50–200× depending on settings.

Standard frame rates and their uses:

• 24 fps — cinematic look, used in Hollywood films
• 25 fps — broadcast standard in PAL regions (Europe, Australia)
• 30 fps — broadcast standard in NTSC regions (North America, Japan)
• 60 fps — smooth sports and action footage, YouTube recommended for gaming
• 120 fps — slow-motion playback at 30fps = 4× slow motion
• 240 fps — extreme slow motion, typically at reduced resolution

Worked example: You are filming a 10-minute corporate video at 4K (3840×2160), 30 fps, using H.264 at 100 Mbps bitrate.

File size = (10 min × 60 sec) × 100 Mbps ÷ 8 = 600 × 12.5 MB = 7,500 MB ≈ 7.5 GB

At 60 fps with the same bitrate: 15 GB for the same 10 minutes.

Storage benchmarks by camera profile:

• 1080p/30fps H.264 (12 Mbps): ~5.4 GB/hour
• 4K/30fps H.264 (100 Mbps): ~45 GB/hour
• 4K/60fps H.265 (150 Mbps): ~67 GB/hour
• 4K/120fps ProRes RAW: ~500–800 GB/hour

Plan storage and backup drives carefully before long shoots. Always bring more cards than you think you need.