CLS Calculator — calculate cls for tech projects. Formula, specs, and practical notes.
SI (decimal) prefixes: 1 KB = 1,000 bytes; 1 MB = 1,000 KB; 1 GB = 1,000 MB; 1 TB = 1,000 GB
Binary prefixes: 1 KiB = 1,024 bytes; 1 MiB = 1,024 KiB; 1 GiB = 1,024 MiB
Hard drive manufacturers use decimal (SI) prefixes — a "1 TB" drive holds 1,000,000,000,000 bytes. Operating systems often display in binary — Windows shows the same drive as approximately 931 GB. The difference is approximately 7% at 1 GB, growing to approximately 10% at 1 TB.
Common file sizes: MP3 (128 kbps, 3 min) ≈ 3 MB; 4K video (H.265, 1 hour) ≈ 15 GB; RAW photo ≈ 25 MB; Word document ≈ 50–500 KB; PostgreSQL database row ≈ 0.5–5 KB.