# Megabits per second to megabytes per second converter

> Convert megabits per second to megabytes per second (Mbps to MB/s) with the exact factor, a conversion chart and worked steps.

Interactive version: https://www.calcopenly.com/conversion/mbps-to-mbs
Subject: Unit converters

An internet plan's megabits per second can be compared with a download display in megabytes per second. Eight bits make a byte, but protocol overhead and congestion can reduce the observed transfer rate. Do not treat the converted line rate as a guaranteed download speed.

One megabit per second is exactly 0.125 megabytes per second, so 100 Mbit/s is 12.5 MB/s. To convert Mbps to MB/s, multiply by 0.125; to convert back, multiply by 8.

Internet speeds are quoted in megabits per second; there are 8 bits in a byte. Because both units are defined exactly, the factor above is exact and the results here carry no conversion error.

## Inputs

- **Megabits per second (Mbit/s)**

## Results

- Megabytes per second (MB/s) — main result
- Conversion
- 1 MB/s in megabits per second (Mbit/s)

## Formula

$$
\text{megabytes per second} = \text{megabits per second} \times 0.125
$$

## Worked examples

### 100 Mbit/s to MB/s

- Megabits per second (Mbit/s): 100 Mbit/s
- **Megabytes per second: 12.5 MB/s**
- Checked against: Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions)

### 2500 Mbit/s to MB/s

- Megabits per second (Mbit/s): 2500 Mbit/s
- **Megabytes per second: 312.5 MB/s**
- Checked against: Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions)

### 10 Mbit/s to MB/s

- Megabits per second (Mbit/s): 10 Mbit/s
- **Megabytes per second: 1.25 MB/s**
- Checked against: Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions)

## Questions

### When would I convert Mbps to MB/s?

An internet plan's megabits per second can be compared with a download display in megabytes per second. Eight bits make a byte, but protocol overhead and congestion can reduce the observed transfer rate. Do not treat the converted line rate as a guaranteed download speed.

### How many megabytes per second are in a megabit per second?

One megabit per second is exactly 0.125 megabytes per second. Internet speeds are quoted in megabits per second; there are 8 bits in a byte.

### How do you convert Mbps to MB/s?

Multiply the number of megabits per second by 0.125. For example, 100 Mbit/s × 0.125 = 12.5 MB/s. To go the other way, divide by 0.125.

### How accurate is the megabits per second to megabytes per second converter?

Accuracy depends on your inputs and the method's assumptions. Decimal arithmetic uses 50 significant digits, but estimates, numerical methods and source data can be less precise; the displayed rounding does not remove those limits. It is checked against 3 worked examples whose answers come from independent sources; for example, “100 Mbit/s to MB/s” is checked against Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions).

### Where does the method come from?

NIST SP 811 (2008), Guide for the Use of the International System of Units, Appendix B; NIST Handbook 44, Appendix C: General tables of units of measurement; BIPM, The International System of Units (SI Brochure), 9th edition.

## Sources

- [NIST SP 811 (2008), Guide for the Use of the International System of Units, Appendix B](https://www.nist.gov/pml/special-publication-811)
- [NIST Handbook 44, Appendix C: General tables of units of measurement](https://www.nist.gov/pml/weights-and-measures/publications/nist-handbooks/handbook-44)
- [BIPM, The International System of Units (SI Brochure), 9th edition](https://www.bipm.org/en/publications/si-brochure)