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Difference Between Brain and Computer

The distinction between brain and computer is extremely helpful in the field of cognitive science and artificial intelligence, where the human brain is utilized to build an artificial neural network to produce an expert system. The first distinction between the brain and the computer is that the brain can function without data, whereas computers require only a small quantity of data to function.

A brain is an innovative and creative organ, but a computer cannot create something new on its own; it would need some program or software to do this. The brain also has common sense reasoning and understanding capabilities.


Difference Between Brain and Computer

The human brain is a highly complex and abstract system. It includes 100 billion neurons and about 1012 synapses per cubic centimeter of the cortex. Breathing, seeing, talking, hearing, walking, imagining, experiencing, learning, smelling, thinking, monitoring, and making decisions are all functions that our brain performs simultaneously. Such jobs necessitate a significant amount of processing.

The human brain's memory is utilized for encoding, retaining, storing, and consequently reminding information and past experiences. It is a place where all of the learned processes and things are retained from the activities. Neurons are responsible for the entire process. Neurons, which are made up of Synapses, are living cells that serve as storage units in our brain.

There are more than 125 trillion synapses in our brain, with each neuron connecting to 10000 or 100000 neurons. In order to store one byte of data, 200 billion neurons are required. However, the brain's storage capacity is limitless.

The human brain does not follow any topology like computer networks. It changes its topology and creates a new connection every time a person learns anything new. On the other hand, information retrieval in the human brain is a complex process in which relevant information is obtained first and then represented in any manner.

Brains only require roughly 1800 calories to complete the tasks mentioned above, however; computers require more power.


Difference Between Brain and Computer

A computer is an electronic device that does computations. It is capable of performing several calculations within a second. However, when we compare the human brain to a computer it is a long way behind. Because the computer is incapable of performing tasks that a typical child's brain can, such as identifying handwritten patterns, distinguishing between different voices, developing new things, and so on.

A computer is made up of several electronic components such as logic gates, transistors, capacitors, diodes, ICs, etc. This electrical component combination allows for extremely fast processing (can be in nanoseconds).

The amount of storage in computers can vary, and the capacity of memory is increasing while the size of memory is decreasing as memory technologies evolve. On the other hand, computer memory can be divided into two types: primary and secondary. Primary is used to save temporary values for mathematical procedures that require quick access or updates.

When the power is turned off, this type of memory content disappears. Secondary memory such as Hard disks, removable disks, and tape drivers is used to store data that needs to be kept for a long time, such as system data programs and other documents. The smallest addressable memory unit is a byte.

In order to establish connections between the computers with the help of several networking devices (like hubs, satellites, switches, workstations, and nodes), the, topologies such as star, bus, mesh, and ring are used.

Connecting so many computers in different locations throughout the world takes a long time. The terms LAN, MAN, and WAN are used to categorize networks based on the area they cover. Client and server architecture is used to retrieve information from the internet. The computer's processing speed is faster, and its energy consumption is in gigawatts.

Difference Between Brain and Computer

Difference Between Brain and Computer
Parameters Brain Computer
Construction It is made up of Neurons and Synapses. It is made up of ICs, transistors, capacitors, diodes, etc.
Memory power 100 teraflops (100 trillion calculations/seconds). 100 million megabytes.
Memory density 107 circuits/cm3 1014 bits/cm3
Information storage Stored in electrochemical and electric impulses. Stored in numeric and symbolic form (i.e., in binary bits).
Backup systems Built-in backup system Backup system is constructed manually.
Energy Consumption 12 watts of power Gigawatts of power.
Reliability and damageability The brain is self-organizing, self-maintaining, and reliable. Computers perform a monotonous job and are unable to self-correct.
Structural organization Self-organized Pre-programmed structure
Parallelism Massive Limited
Input/output equipment Sensory organs Keyboards, cameras, mouse, web, etc.
Information processing power Low High
Transmission of information Uses chemicals to fire the action potential in the neurons. Communication is achieved via electrical coded signals.
Size and weight The volume of the brain is 1500 cm3, and its weight is around 3.3 pounds. Variable weight and size from a few grams to tons.
Memory growth Increases each time by connecting synaptic links. Increases as more memory chips are added.

Key Difference Between Brain and Computer

  • The brain can have 100 teraflops of memory with a density of 107 circuits per cm3, while computer memory has 100 million megabytes with a density of 1014 bits per cm3. Memory in the brain develops instantaneously by connecting synaptic links, whereas with a computer, additional chips are required to scale memory.
  • The brain is self-organizing, but the computer has a predetermined structure.
  • The brain uses both electrochemical and electromagnetic forms to storage to store information. Information is saved in symbolic and numeric form in a c
  • In the brain, the information is transmitted using chemicals in order to fire an action potential in the neurons. On the other hand, in a computer, the information is kept in both symbolic and numeric forms.
  • The Brain has an inbuilt backup system where the functioning pathways replace the damaged pathways. Backup systems, on the other hand, are created manually on a computer.
  • The energy consumption in the brain is less than the computer.
  • Although the brain's processing power is limitless and allows for online processing, the brain processes information at a slow speed due to the slow movement of neurons. On the other hand, computer processing power is substantial due to rapid transistors.


The most important distinction between the brain and the computer is that the brain operates on a number system by default, whereas the computer operates on a binary language, and the brain uses a heuristic approach to learn by experiences. On the other hand, computers learn the things which are residing in memory (distributive learning).

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