Raw File Size Calculator - Free Online Tool

Our Raw File Size Calculator estimates your image file size by considering several critical photographic variables. It doesn't just count pixels; it models the data structure of a raw file.

The calculation fundamentally involves determining the total number of bits needed to store all captured color information (the sensor resolution multiplied by the bit depth, such as 12 or 14 bits per channel). We then factor in typical overhead and compression ratios associated with popular RAW formats like .CR3 or .NEF.

• Sensor Resolution: Determines the total pixel count (e.g., 60 megapixels).
• Bit Depth: Indicates the color information depth, which directly impacts file size.
• Format Overhead: Accounts for metadata and internal organizational data within the raw container.

By adjusting these inputs—for instance, simulating a switch from 12-bit to 16-bit capture—you can see how dramatically the resulting file size estimate changes, helping you plan your storage needs accurately.

To maximize accuracy and efficiency when using this calculator, consider these best practices:

• Test with Real Data: Before a major shoot, take 5 test shots and use the resulting file sizes to verify that your calculated average size is accurate.
• Understand Aspect Ratio Impact: While resolution (pixels) is key, remember that physical sensor cropping can sometimes change effective aspect ratios, which should be noted if you are planning for specific output dimensions.
• Batch Planning: If shooting a sequence of images with varying settings (e.g., portrait mode vs. landscape), calculate the size for each *type* of shot and then average them to get a reliable daily estimate.

By integrating file size planning into your pre-shoot checklist, you ensure that your hardware and storage infrastructure can keep up with your creative output.