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TRANSFER CALCULATOR

File Copy Time Calculator

Calculate how long it will take to copy files between USB drives, SSDs, hard drives, NAS devices, and network storage. Estimate transfer times for 100GB, 500GB, 1TB and larger files.

Input

Input values

Typical transfer speed

Calculations run only in your browser. Your input is not sent to the server.

Estimated copy time

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Seconds --
Minutes --
Hours --
Days --

Examples

Common examples

How file copy time is calculated

This file copy time calculator divides file size in MB by transfer speed in MB/s. For example, 100GB is treated as 102400MB. At 100MB/s, the estimate is 1024 seconds, or about 17 minutes. The result is a practical estimate for checking how long a USB copy, SSD transfer, NAS migration, or LAN transfer may take before starting the job.

Typical speeds for USB drives, SSDs, and NAS devices

Actual speed depends on the slowest part of the path: the source drive, destination drive, cable, port, file system, and network. USB2.0 is often around 30MB/s, USB3.0 may be around 100MB/s, external SSDs often reach 500MB/s, and NVMe SSDs can be much faster. 1Gbps LAN has a theoretical ceiling near 125MB/s, while 10Gbps LAN is near 1250MB/s before protocol overhead.

How long does it take to copy 100GB, 500GB, or 1TB?

For everyday planning, 100GB over USB3.0 is roughly 17 minutes, 500GB is roughly 1 hour 25 minutes, and 1TB is roughly 2 hours 50 minutes. Faster SSDs can reduce this dramatically, while small files, antivirus scanning, Wi-Fi, aging hard drives, and NAS load can make the real transfer slower.

Planning data migration during PC replacement

When replacing PCs, estimating copy time before the work begins helps avoid schedule surprises. Check user folders, desktop data, downloads, Outlook archives, browser profiles, photos, CAD data, and local application data, then estimate transfer time with the expected USB, SSD, or LAN speed. IT teams can combine this estimate with a checklist for backup, restore, printer setup, VPN settings, and user confirmation.

External SSDs compared with USB flash drives

A USB flash drive may be convenient, but many models slow down during large writes. External SSDs usually sustain higher speeds and are better for hundreds of gigabytes or full PC migration. If 500GB must be copied repeatedly, choosing a faster SSD or wired LAN path can save hours across multiple machines.

About This Tool

File Copy Time Calculator is a free online utility that helps you estimate transfer time from file size and USB, SSD, NAS, or network speed. It is designed for office workers, students, developers, IT administrators, and anyone who needs a quick result without installing dedicated software. The tool works through a standard web browser and can be used free of charge without creating an account. Its focused controls make it practical for both one-off personal tasks and repeat work.

When It Helps

  • Handling a routine task at work
  • Preparing school or personal materials
  • Checking data during development or troubleshooting
  • Completing a task on a PC without installing software

How to Use

  1. Enter or select the data size and expected transfer speed.
  2. Choose the available options that match your purpose.
  3. Run the tool and review the result shown in the browser.
  4. Copy or download the result when it is ready.

Frequently Asked Questions

Is File Copy Time Calculator free to use?

Yes. You can use the tool free of charge and no account registration is required.

Do I need to install an app or browser extension?

No. The tool runs in a modern web browser, so you do not need to install dedicated software.

Can I use it on a smartphone or tablet?

Yes. The page is responsive, although a desktop browser may be easier for large files or detailed work.

Are my inputs saved permanently?

ToolGarage does not intentionally retain your working data as saved tool content. Browser storage or server communication, when required by a specific feature, is limited to providing that feature.

Can I use the result for business or school work?

Yes. Please review important results yourself and follow the rules, security policy, and file-handling requirements of your organization.

Notes

Review important outputs before using them. Processing is performed in the browser whenever the feature allows it; tools that must retrieve public website or DNS information communicate only as required to produce the requested result.

About ToolGarage

ToolGarage is operated by an active systems engineer in Hokkaido, Japan, with hands-on experience in system development, PC deployment, and web production. It provides free calculation, conversion, and diagnostic tools based on tasks encountered in real workplaces.

File Copy Time Calculator | Free ToolGarage Utility

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