Photo File Size Calculator
Estimate the uncompressed and compressed file size of a photo based on resolution, bit depth, and format.
How to Use the Photo File Size Calculator
- Enter the image width and height in pixels.
- Select the bit depth of the image.
- Choose the file format.
- Click Calculate to see the estimated file size.
使用场景
- •Planning storage needs for a photo shoot.
- •Estimating upload time for large image files.
- •Comparing storage requirements between RAW and JPEG.
- •Calculating bandwidth for image-heavy websites.
公式
Raw Size (MB) = Width × Height × Bit Depth × 3 / 8 / 1,048,576. JPEG ≈ Raw × 8%. TIFF/RAW ≈ Raw × 100%.
常见问题
Why does JPEG have a smaller file size?
JPEG uses lossy compression, typically reducing file size to about 8% of the uncompressed data.
What is bit depth?
Bit depth determines how many tones each colour channel can represent: 8-bit = 256 tones, 16-bit = 65,536 tones.
Is it free?
Yes, all calculators on OhMyCalc are completely free.