Download Time & Speed Comparison

When to use it

Compare how long a large game, video or backup would take at two steady download speeds. This page explains the calculation and provides a downloadable canvas; it does not run a speed test. The example uses 100 GB with 300 and 1,000 Mbps, not a promise about any internet plan.

Inputs

Calculation method

Enter both speeds as Mbps numbers. The shared fixed reference 1 Mbps = 1,000,000 bit/s gives each speed a data/time quantity; results convert to MB/s. Divide file size by each rate and display minutes. A minus B is the time difference. The default uses decimal GB and MB; the unit system handles byte/bit and time conversions.

300 [Speed A Mbps] × 1 Mbps → Converted speed A MB/s

1,000 [Speed B Mbps] × 1 Mbps → Converted speed B MB/s

100 [File size GB]/Converted speed A MB/s → Time A min

File size GB/Converted speed B MB/s → Time B min

Time A min - Time B min → Time difference (A − B) min

Change one input

Change only the file size from 100 to 70 GB. The two converted speeds stay the same; both times and their difference fall to 70% of their original values. A takes about 31.11 min, B 9.33 min: a difference of about 21.78 min.

Results are displayed to at most two decimal places; later formulas use unrounded values.

Scope and limits

• File size ≥ 0; both speeds > 0. Decimal GB and MB.
• Time difference = A − B; positive means B is faster.
• Theoretical steady-speed transfer only; actual downloads may take longer.

The model assumes a constant transfer speed. Server limits, shared bandwidth, Wi-Fi, storage and protocol overhead can increase elapsed time. Installation and decompression are excluded. A negative difference means B takes longer; equal speeds give zero. Use a nonnegative file size and strictly positive speeds. GB and GiB are different units; do not paste a GiB value into the GB input unchanged.

Download and import into Calvance to edit the numbers. The canvas does not reject every invalid input; check the stated ranges.

Common questions

Why does 1,000 Mbps become 125 MB/s?

One byte contains eight bits. Lowercase b denotes bits; uppercase B denotes bytes. Dividing by 8 converts units, not network efficiency. It does not guarantee that a download will reach 125 MB/s.

What if my file size is shown in GiB?

1 GiB = 1.073741824 GB. Convert to GB before entering it; for example, 100 GiB = 107.3741824 GB. NIST defines the decimal and binary units. Alternatively, choose GiB as the file-size input unit and enter the original GiB value; the canvas converts it.

Is 44.44 minutes 44 minutes 44 seconds?

No. The fractional part is a fraction of a minute. The unrounded default time is 44 minutes 26.67 seconds, approximately. Use unrounded values for subsequent calculations.

How to import your template

We recommend using the latest version of Calvance.

1. Save the file. Choose Download template and save the .calvx file to Files on your iPhone or iPad. From a computer, you can send it to your device with AirDrop.
2. Open Import. In All Canvases in Calvance, tap the add button to open the template screen, then choose Import.
3. Choose the file. Select the saved .calvx file to create your own canvas. Importing uses one canvas from your allowance.
4. Edit and check. Check the results against the worked example, then add your numbers. Duplicate the canvas to keep different versions.

Download .calvx file