File size calculator

Bandwidth converter Download time calculator Filesize calculator

This calculator helps you estimate filesize, using bandwidth and time as inputs. Use it to estimate video file size, disk size, network backup capacity...

Calculate file size

60 minutes * 100 Mbps

= 1 hours * 12.5 MB/s

= 45 GB

Compare

Compare 45 GB to standard capacities from:
Hard disk • Tape drive • Optical drive •

CDROM 650MB x 69.2 units = 45 GB • CDROM 700MB x 64.3 units = 45 GB • CDROM 800MB x 56.3 units = 45 GB • Mini-DVD Single-sided x 30.8 units = 45 GB • Mini-DVD Double-sided x 15.4 units = 45 GB • DVD Single-sided x 9.6 units = 45 GB • DVD Double-sided x 4.8 units = 45 GB • Blu-Ray Single layer x 1.8 units = 45 GB • Blu-Ray Double layer = 1.1 files of 45 GB • Blu-Ray BDXL/BD-RE = 2.2 files of 45 GB •

References

  • List_of_device_bit_rates
  • International System of Units (SI) (KB = 1000 bytes, KiB = 1024 bytes)

    • Frequently Asked Questions

    How do I calculate file size from bandwidth and time?

    Multiply bandwidth by time: Size = Bandwidth × Time. Convert units first: 100 Mbps × 60 seconds = 6000 Megabits = 750 MB. Remember: 8 bits = 1 byte, so divide bits by 8 to get bytes.

    How big is a 1-hour video file?

    Depends on bitrate: YouTube HD (5 Mbps) = 2.25 GB/hour. Netflix HD (5.8 Mbps) = 2.6 GB/hour. 4K streaming (15-25 Mbps) = 7-11 GB/hour. Blu-ray quality (40 Mbps) = 18 GB/hour.

    What is the difference between MB and MiB?

    MB (megabyte) = 1,000,000 bytes (decimal, SI standard). MiB (mebibyte) = 1,048,576 bytes (binary, 2^20). Hard drives use MB; Windows often shows MiB. A "1 TB" drive shows as 931 GiB in Windows.

    How many hours of video fit on a hard drive?

    At Netflix HD quality (2.6 GB/hr): 1TB = 385 hours. At 4K (10 GB/hr): 1TB = 100 hours. At Blu-ray quality (18 GB/hr): 1TB = 55 hours. Compressed formats like H.265 can nearly double these numbers.