Download Time Calculator
Instantly estimate download & upload time for any file
Download Time Calculator launched on April 26, 2026 with 1 votes, #8,101 of 21,248 launches that month.
What it does
Enter your internet speed and file size to instantly calculate transfer time. Supports all connection types (5G, fiber, cable, DSL), accounts for TCP overhead, and includes a speed reference table. Free, no signup, works in 8 languages.
Free online download time calculator. Estimate how long it will take to download or upload files based on your internet speed.
Instantly estimate how long it will take to download or upload any file. Enter your internet speed and file size to get accurate transfer time calculations. Mbps ≠ MBps! ISPs advertise speeds in Mbps (megabits), while apps show download progress in MBps (megabytes). 1 MBps = 8 Mbps. So 100 Mbps internet = 12.5 MBps actual download speed. Learn more on Wikipedia → Understanding the math behind file transfer time estimation. Downloading a 1 GB file at 100 Mbps with 10% TCP overhead: File = 8,589,934,592 bits. Effective speed = 90,000,000 bps. Time = 8,589,934,592 ÷ 90,000,000 = 95.4 seconds ≈ 1 minute 35 seconds. Don't know your current internet speed? Use one of these trusted, free speed…from downloadtimecalculator.net
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