Inputs
Choose decimal KB=1000 or binary KiB=1024 below.
Enter time to compute speed or leave blank to compute time.
Enter throughput to compute time or conversions.
Speed
—
Mbps
Equivalent
—
MB/s
Equivalent
—
Kbps
Equivalent
—
Gbps
Estimated Time for Entered Size @ Speed
—
Estimated Size Transferable in Entered Time @ Speed
—
Speed Plans
Click a plan to fill the throughput field.
Streaming Bitrates
Common File Sizes
Time
Presets fill fields without immediately changing your base choice; press Calculate to recompute.
Formula Used
We treat Mbps as megabits per second using decimal megas (1 Mb = 1,000,000 bits). Bytes are 8 bits.
Mbps = (bytes × 8) / (seconds × 1,000,000)MB/s = Mbps ÷ 8Kbps = Mbps × 1000Gbps = Mbps ÷ 1000
For binary sizes (KiB, MiB, GiB, TiB, PiB) we use 1 KiB = 1024 bytes. Toggle the base to switch.
How to Use
- Enter any two of the three: Data Size, Transfer Time, Throughput.
- Pick the correct size base: decimal (KB=1000) or binary (KiB=1024).
- Use Presets for quick fills.
- Click Calculate. Conversions and estimates will appear.
- Use Add to Table to record scenarios then export with CSV or PDF.
Branding
Update brand name logo and accent color via the BRAND object in the script. Colors propagate through buttons chips and highlights.
Set logo by editing
BRAND.logoUrl in code.Example Data
| # | Data Size | Time | Speed (Mbps) | MB/s | Kbps | Gbps |
|---|---|---|---|---|---|---|
| 1 | 700 MB | 10 min | 9.33 | 1.17 | 9,333 | 0.009 |
| 2 | 4 GB | 20 min | 26.67 | 3.33 | 26,667 | 0.027 |
| 3 | 2 GB | 5 min | 53.33 | 6.67 | 53,333 | 0.053 |
Example rows use decimal base (KB=1000) for simplicity.
FAQs
Mbps measures megabits per second while MB/s measures megabytes per second. 8 bits equal 1 byte, so MB/s ≈ Mbps ÷ 8 (ignoring protocol overhead).
Real transfers include overhead (TCP/IP, TLS, file system), latency, Wi‑Fi interference, server limits, and congestion. Expect 70–95% of line rate depending on conditions and protocol.
ISPs quote Mbps using decimal megas (1 Mb = 1,000,000 bits). Operating systems may display file sizes in binary (MiB). Choose the base that matches your context or toggle to compare.
Yes. Enter the throughput and the data size, leave time blank, and press Calculate. The tool will compute the estimated duration with conversions shown.
The math is the same, but achievable throughput often differs. Ethernet is usually more consistent. Wi‑Fi is susceptible to interference, distance, and device capabilities.
MiB/s uses 1 MiB = 1,048,576 bytes (binary), while MB/s uses 1 MB = 1,000,000 bytes (decimal). The numbers differ by ~4.86%. This calculator supports both conventions.
Use Add to Table to append current inputs and computed results. Then export the table as CSV or PDF for sharing, logging, or comparison.