DevVivid

File Size Calculator

Upload a file or paste text content to calculate its size in various units (Bytes, KB, MB, GB).

Option 1: Upload File

OR

Option 2: Paste Text Content

Calculated Size:

Bytes: 0 B

Kilobytes (KB): 0.00 KB

Megabytes (MB): 0.00 MB

Gigabytes (GB): 0.00 GB

(1 KB = 1024 Bytes)

About File Size Calculator

Have you ever wondered exactly how much space your files take up? Whether you're a developer optimizing code, a content creator managing media files, or just someone curious about data sizes, our File Size Calculator is here to help. This intuitive tool instantly calculates file sizes in multiple formats, making it easy to understand your data footprint.

How It Works?

Our calculator offers two convenient ways to measure file sizes. You can either upload a file directly from your device or paste text content to see its UTF-8 encoded size. The tool instantly displays results in bytes, kilobytes (KB), megabytes (MB), and gigabytes (GB), giving you a complete picture of your data's storage requirements.

Why Use a File Size Calculator?

  • Web Development: Optimize images, scripts, and assets for faster loading times
  • Content Creation: Ensure files meet platform upload limits and requirements
  • Storage Management: Plan disk space and understand storage needs
  • Email Attachments: Check if files are within email size limits

Understanding File Size Units

File sizes can seem confusing with all those different units, but it's actually quite straightforward. Our calculator uses the binary system (base-2) where each unit is 1,024 times larger than the previous one:

1 Byte (B)

8 bits - smallest addressable unit

1 Kilobyte (KB)

1,024 bytes - typical text files

1 Megabyte (MB)

1,024 KB - photos, documents

1 Gigabyte (GB)

1,024 MB - videos, software

Perfect for Various File Types

Whether you're working with text files, images, videos, documents, or any other file type, our calculator handles them all. For text content, we calculate the UTF-8 encoded size, which is the standard encoding used on the web and in most modern applications.

Privacy First

All calculations happen directly in your browser. Your files never leave your device, ensuring complete privacy and security.

Quick Tips for File Size Optimization

  • Compress images using modern formats like WebP for web use
  • Trim down your code—minify CSS, JS, and HTML to make your files smaller and speed up your website
  • Use zip compression for multiple files or large documents
  • Consider cloud storage links for very large files instead of direct uploads

Ready to discover how much space your files really take up? Simply upload a file or paste some text above and get instant, accurate size calculations in all the units you need.