1 GB = 1,024 MB (binary). Common conversions: 1 KB = 1,024 bytes. 1 MB = 1,024 KB = 1,048,576 bytes. 1 GB = 1,024 MB = 1,073,741,824 bytes. 1 TB = 1,024 GB = 1,099,511,627,776 bytes. Why 1,024 not 1,000: Computers use binary (base-2). 2^10 = 1,024 (closest power to 1,000).

What is the difference between MB and Mb?

MB vs Mb: MB (Megabyte): Storage size (file size, disk space). 1 MB = 8 Megabits. Example: 5 MB photo file. Mb (Megabit): Internet speed (download/upload). 1 Mb = 0.125 MB. Example: 100 Mbps internet. Conversion: 100 Mbps internet = 12.5 MB/s download speed. 8 MB file on 100 Mbps = 0.64 seconds download. Rule: Capitalize B for Bytes (storage), lowercase b for bits (speed).

How much storage do I need?

Storage needs by usage: Light user (web, email, docs): 256 GB (plenty for most). Casual (photos, music, some videos): 512 GB - 1 TB. Heavy (photo editing, 4K video, gaming): 1-2 TB SSD + 4-8 TB HDD. Professional (video editing, large projects): 2-4 TB SSD + 10+ TB external. File sizes: Document: 10-100 KB. Photo (JPEG): 2-5 MB. RAW photo: 25-50 MB. 1080p video (1 min): 100-200 MB. 4K video (1 min): 400-800 MB. Game: 50-150 GB. Strategy: SSD for OS, apps, active projects (fast, expensive). HDD for archives, backups (slow, cheap). Cloud for collaboration, offsite backup (Dropbox, Google Drive).

Conversion Calculators

Data Unit Converter

Convert between data units including bytes, kilobytes, megabytes, gigabytes, and terabytes with precision digital storage calculations for IT professionals, web developers, and data management applications with both binary and decimal conversions.

How to Use the Data Unit Converter

Use the Data Unit Converter to between data units including bytes, kilobytes, megabytes, gigabytes, and terabytes with precision digital storage calculations for IT professionals, web developers, and data management applications with both binary and decimal conversions.. Enter your values to get accurate, instant results tailored to your situation.

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Data Units Guide

Digital storage conversion

Expert Tips

Binary vs Decimal: 1 KB = 1,000 Bytes (Decimal) or 1,024 Bytes (Binary): Decimal (SI): KB=1,000, MB=1,000,000, GB=1 billion. Binary (IEC): KiB=1,024, MiB=1,048,576, GiB=1,073,741,824. Hard drives use decimal (500 GB = 500 billion bytes). RAM uses binary (8 GB = 8,589,934,592 bytes). Explains why 500 GB drive shows as 465 GiB.
Powers of 2 vs Powers of 10: 1 KB = 10³ bytes (decimal) or 2¹⁰ bytes (binary). 1 MB = 10⁶ or 2²⁰. 1 GB = 10⁹ or 2³⁰. 1 TB = 10¹² or 2⁴⁰. Binary multiples grow faster: 1 TiB = 1.1 TB. Always check which standard is used.
1 Byte = 8 Bits: Bit (b) = single 0 or 1. Byte (B) = 8 bits. Internet speeds in bits: 100 Mbps = 12.5 MB/s download. File sizes in bytes: 100 MB file. Convert: Divide bits by 8 to get bytes. Watch capitalization: Mb ≠ MB (8× difference).
Marketing Uses Decimal, OS Uses Binary: 1 TB hard drive (decimal) = 1,000,000,000,000 bytes = 931 GiB (binary). OS shows 931 GB, not 1,000 GB. Not false advertising—just different units. Actual capacity unchanged. Buy drives by decimal, compare in OS by binary.

Essential Fundamentals — Data measurement

Units Hierarchy

Decimal (SI) System: KB = 1,000 bytes. MB = 1,000 KB = 1,000,000 bytes. GB = 1,000 MB = 1 billion bytes. TB = 1,000 GB = 1 trillion bytes. Used by hard drive manufacturers, ISPs. Easy decimal multiples.
Binary (IEC) System: KiB = 1,024 bytes. MiB = 1,024 KiB = 1,048,576 bytes. GiB = 1,024 MiB = 1,073,741,824 bytes. TiB = 1,024 GiB. Used by operating systems, RAM. Based on powers of 2 (computer-native).

Advanced Strategies — Practical usage

Storage Planning

Account for OS Overhead: OS reserves 10-15% of drive space. 1 TB drive usable: 850-900 GB. Plan accordingly when sizing storage needs.

Frequently Asked Questions

How many MB in a GB?: 1 GB = 1,024 MB (binary). Common conversions: 1 KB = 1,024 bytes. 1 MB = 1,024 KB = 1,048,576 bytes. 1 GB = 1,024 MB = 1,073,741,824 bytes. 1 TB = 1,024 GB = 1,099,511,627,776 bytes. Why 1,024 not 1,000: Computers use binary (base-2). 2^10 = 1,024 (closest power to 1,000).
What is the difference between MB and Mb?: MB vs Mb: MB (Megabyte): Storage size (file size, disk space). 1 MB = 8 Megabits. Example: 5 MB photo file. Mb (Megabit): Internet speed (download/upload). 1 Mb = 0.125 MB. Example: 100 Mbps internet. Conversion: 100 Mbps internet = 12.5 MB/s download speed. 8 MB file on 100 Mbps = 0.64 seconds download. Rule: Capitalize B for Bytes (storage), lowercase b for bits (speed).
How much storage do I need?: Storage needs by usage: Light user (web, email, docs): 256 GB (plenty for most). Casual (photos, music, some videos): 512 GB - 1 TB. Heavy (photo editing, 4K video, gaming): 1-2 TB SSD + 4-8 TB HDD. Professional (video editing, large projects): 2-4 TB SSD + 10+ TB external. File sizes: Document: 10-100 KB. Photo (JPEG): 2-5 MB. RAW photo: 25-50 MB. 1080p video (1 min): 100-200 MB. 4K video (1 min): 400-800 MB. Game: 50-150 GB. Strategy: SSD for OS, apps, active projects (fast, expensive). HDD for archives, backups (slow, cheap). Cloud for collaboration, offsite backup (Dropbox, Google Drive).