How many Amps to Start a Car? (Everything you Need to Know)

A person should know about the various stages and different amounts of amperes consumed by the car. When we compare the time of starting a motor then a normal running of a car it does require more power for the startup. This article will guide you in detail on how many amps are required to Start a Car and what factors affect the consumption of higher amp draws. 

How many amps do you need to start a car? 

In the case of average drawn the size of the engine is the main factor of the amps drawn by the battery to start.

  • On average, a vehicle with a mid-size draws 400 to 600 amps to Start a Car.
  • The larger vehicle which has a larger battery takes the power from 1500 to 2000 amps to Start a Car. 
  • The battery of a little car will require 200 amps to Start a Car
Start a Car
Start a Car

There is a different ampere drawn by a car to start and a car for an amp-hour. The following are the measurement for ampere rating which are printed on the battery label explaining the essential properties of the battery:

  1. Cranking amps CA
  2. Cold-cranking amps CCA. 

Cranking amps:

It means the amount of electricity the battery can generate in 30 seconds at 32 degrees Fahrenheit which means the energy required by the battery is at 0 degrees F. In simple words, we can say that the cranking amps show how much electricity the battery is able to provide in normal weather conditions. 

Cold-cranking amps CAA:

Cold-cranking amps rating defines the energy needed by the car battery to get started in very cold temperatures. With the amps requirements, the car also needs voltage to start. 

The voltage required for starting up:

  • The standard type of battery of a car of 12 volts has a minimum rating of 12.6V.
  • The voltage required by the battery for starting up depends on the conditions that increase to 13.7V and 14.7V.

If all the requirements mentioned above of CA, CAA, and voltage are not met then the engine may fail to Start a Car and if a person really wants to know about the actual amps a car draws to start it can be checked by using the battery tester. with the help of it, you will know the exact amount of rating.

What are the factors which determine a battery to draw higher amps?

The following are the factors that determine a battery to draw higher amps:

  • Oil viscosity
  • Temperatures circumstances
  • Type of engine
  • Voltage calculation

Oil viscosity:

Oil viscosity is an important factor that makes the engine run easily. If the oil viscosity is the improper ratio it will be difficult for an engine to run properly. If an engine has a higher grade of oil viscosity it will be difficult to start an engine when it is prepared to an Indian having a lower grade of oil viscosity. But this doesn’t mean that the Indian always made a lower viscosity. if the vehicle is used in an area of higher temperature they do require higher viscosity whereas the vehicle used in colder temperature requires lower viscosity.

Start a Car
Start a Car

Temperature conditions:

The temperature of the surrounding is another important factor in an engine to start. The oil gets very thick if the weather of the rounding area is 20 degrees or under which makes it harder for the engine of a car to spin so if you are using the vehicle in a cold area your car needs to have a higher cold cranking amp. 

Type of engine:

If you compare the types of engines in order to pull more energy than a diesel car is able to pull more energy than a gasoline type of engine.

Start a Car
Start a Car

Voltage calculation:

Voltage calculation is used to see the charging level or state of charge of a car’s battery. For this, you only need to see the actual voltage of the battery which can be determined by using a multimeter and setting it to DC voltage having a scale of 12 volts after then connecting the probes to the battery terminal. After finishing all the setup you will be able to see the voltage rating display on the multimeter screen. The following are different readings of voltage levels showing the state of charge.

Voltage LevelState of Charge
12.6 volts100%
12.4 volts75%
12.2 volts50%
12.0 volts25%
11.9 volts0%


The amps required by an engine to start a car are different according to the weather condition type of the engine and the oil viscosity. The amp required for starting up the engine is more than the amp required when a car is normally running. So by the above information, you will get all the information regarding the amps drawn by an engine to jump start.


What is the requirement of amps to start a dead battery?

A dead battery needs an ampere of 400 to 500 to start.

How many amps are there in a 12-volt battery of a car?

A 12-volt battery has an ampere reading of 160.

Rick Costa

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