Q
Evaluate Weigh the pros and cons of technologies, products and projects you are considering.

What is the difference between bit rate and baud rate?

Learn how to understand the difference between bit rate and baud rate in this expert answer.

While bit rate and baud rate are closely linked, they aren't the same thing. Bit rate is a measure of the number...

of data bits -- zeros and ones -- that can be transmitted in one second. A bit rate of 2,400 bits per second (bps) for example, would mean 2,400 zeros and ones are transmitted each second.

Baud rate represents the number of times per second a signal (changing from zero to one or one to zero) or symbol (the connection's voltage, frequency or phase) in a communications channel changes state or varies. For example, a 2,400 baud rate means the channel is changing states up to 2,400 times per second. In this case, the baud rate is the same as the bit rate: 2,400 bps, and a bit rate of one equals a baud rate of one.

While bit rate and baud rate have similarities, they aren't the same.

Analog telephone modems were simpler than digital communications, and often bits per second and baud were the same, with one symbol (baud) transmitting one bit. To make communications faster, more advanced modem use modulation techniques that send more bits per symbol. As a result, bit and baud rates aren't always the same number.

Depending upon the modulation used, if a channel can send up to four bits per baud, the baud state would change just once. So, the baud rate would be one-fourth the bit rate in this case.

You can think of the baud rate formula like this: bits per second = baud per second x the number of bits per baud.

Next Steps

Is gigabit wireless a necessity?

Think about capacity, not wireless throughput

Learn more about higher throughputs in data centers

This was last published in June 2016

Dig Deeper on Network Design

PRO+

Content

Find more PRO+ content and other member only offers, here.

Have a question for an expert?

Please add a title for your question

Get answers from a TechTarget expert on whatever's puzzling you.

You will be able to add details on the next page.

Join the conversation

2 comments

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

What baud rate formula is used to calculate bit vs. baud in advanced telecommunications?
Cancel
I do not agree with your explanation of baud rate. You made it look more like sampling frequency than depicting data transfer. I believe you can make it better.
Cancel

-ADS BY GOOGLE

SearchEnterpriseWAN

SearchUnifiedCommunications

SearchMobileComputing

SearchDataCenter

SearchITChannel

Close