Download Time Calculator
How long a file takes at your connection speed.
Enter your values
ⓘ Live results
Results
- Download time
- 8m 1s
- Effective speed
- 80 Mbps (10 MB/s)
- Total data
- 4813 MB
- Time at full advertised speed
- 6.4 minutes
Quick answer
Download time is file size in bits divided by connection speed in bits per second; remember 1 byte is 8 bits.
Time = size (MB) × 8 ÷ speed (Mbps)
How to use the Download Time Calculator
- 1Enter the file size in gigabytes.
- 2Enter your connection speed in Mbps.
- 3Adjust efficiency for real-world overhead.
Worked example
Using the values the calculator loads with:
Inputs
- File size4.7 GB
- Connection speed100 Mbps
- Real-world efficiency80 %
Results
- Download time8m 1s
- Effective speed80 Mbps (10 MB/s)
- Total data4813 MB
- Time at full advertised speed6.4 minutes
Frequently asked questions
Why is my download slower than advertised?
Protocol overhead, server limits, Wi-Fi loss and congestion typically leave 70–85% of the headline speed.
Mbps vs MB/s?
Divide Mbps by 8 to get MB/s. A 100 Mbps line downloads at about 12.5 MB/s at best.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.