How Many Watts Does A Circular Saw Use?

A quality circular saw is important for crosscutting, ripping, and plunge-cutting wood. Many people ask, “ how many watts does a circular saw use?”

 To evaluate the saw’s cutting power, you must first determine how many watts of electricity it consumes.

This will indicate the saw’s demand on your electrical power source and provide a rough estimate of the tool’s strength.

In this article, we will answer your question along with all the relevant information. Scroll Till the end.

How Many Watts Does A Circular Saw Use?

This question is hard to answer as there is no fixed wattage value for circular saws due to size and motor variations.

The initial wattage of a circular saw is 2400 watts, but its operating wattage is 1200 watts. 

Depending on their size and motor, different types of saws have different wattage requirements. So, check the users manual to measure the wattage demand correctly.

How Can I Determine The Wattage Consumption Of My Circular Saw?

The voltage and current of the circular saw can be used to determine how many watts it has. Any electronic device’s power consumption can be calculated by multiplying its voltage by its current. 

This is the standard method. The amount of electricity that the circular saw requires to operate will determine the cost of the tool.

If the tool is powered by AC, you are need to be familiar with the power factors. If it is powered by a battery, you need to be aware of both the capacity and the voltage of the battery. 

The amount of power is shown by the “watt” symbol. Now, let’s look at the different ways we might measure this.

The power of any electronic device can be calculated by multiplying its voltage by its current (P = V I). 

Regarding the Devices That Operate on AC Current

Power is equal to the product of voltage times current times the power factor, or (P=VIPF).

 Regarding the Devices that are Powered by a Battery

Power equals capacity multiplied by voltage, or (P = V I).

The wattage of many electronic equipment may be easily calculated using this method.

Factors To Determine The Wattage Demand Of A Circular Saw

Power Factor

The power factor, often known as PF, is defined as the ratio of real power to perceived power, and it is calculated as kW divided by kVA.

 You need to be familiar with the relevant technical concepts in order to calculate the power factor.

In light of this, I would like to suggest that you pick 0.85 for the power factor. It can be altered depending on the device being used.

Changing AC To DC Voltage

The majority of saw motors are constructed with DC motors rather than AC motors since DC motors are simpler and less expensive to control. 

However, some watts will be lost in the process of converting AC to DC. Therefore, a Power factor of 0.95 should be used wherever possible for figuring out how many watts the circular saw needs.

Volts

A circular saw with a cord will use 120 volts, while a circular saw without a cord can use voltages like 20V, 36V, or 56V, depending on how it was made. 

Voltage has a direct effect on how fast the saw blade spins. When the voltage difference is high, electronics can move quickly, which means that the spin rate will be higher with less torque.

When the voltage is high, the torque will go down. This will cause the current draw to go up, which can cause the coils to overheat and shorten the life of the motor. 

So it’s best to use the circular saw with the voltage that comes with it. Don’t use it with more or less voltage.

Amps

A circular saw with a cord uses 10–15 amps of electricity, while a cordless circular saw uses 1.5–10 amps. When a motor is starting up, it needs more current to help it deal with the extra forces.

 When the current is raised, the torque of the motor can also be raised. When the blades are bigger, more current will be needed.

Even if the circular motor is rated for 15 Amps, it won’t always use that much. It can use up to 15 Amps when it starts up.

It will need 8–10 Amps when it is running. When the load goes up, Amps will go up quickly to make the motor’s torque go up.

When we think about cordless circular saws, we think about Li-Ion batteries that can be charged. There are different sizes of these batteries. It could be 1.5 to 10 Amh.

If you use a battery with 2 Amh. You can use up 1 ampere in 2 tours or 2 amperes in 1 hour.

So a battery with more power is better than one with less power. Because it won’t be discharged for a long time.

FAQs about the Wattage demand of a circular saw

Final Thoughts

Now you know the calculation of how many watts does a circular saw use. Wattage demand is the main factor of the effective performance of a circular saw.

To fulfil the wattage demand, follow the calculation process we have mentioned above. Also, do not forget about the voltage and amps demands.