Complete guide: Internet Speed
Updated:
Connections usually advertise megabits per second (Mbps), while downloads show megabytes per second (MB/s). Eight bits make a byte: 100 Mbps equals 12.5 MB/s before losses. MiB/s uses binary bytes and is not the same as MB/s.
Ideal time = file bytes × 8 ÷ bits per second. Adjusted time divides by assumed throughput as a fraction: a 1 GB file at 100 Mbps takes ideally 80 seconds, or 100 seconds at 80%. Displayed seconds round upward.
This is not a speed test: your connection is not measured. Initial 80% is an editable example, not detected data. Wi-Fi, server, congestion, protocols and other downloads change throughput; startup latency, compression and pauses are not included.
Sources and conversion conventions
Document review: 2026-10-24
How it works
- 1Select units or the applicable reference.
- 2Enter the quantity or size you want to compare.
- 3Check the breakdown and equivalence conventions.
Frequently asked questions
Does it measure my actual connection?
No. It converts your entered speed and simulates constant throughput.
Can I share a conversion with its values?
Yes. The link retains quantity, units and all entered options; recipients can reproduce the result and edit the inputs.