Relation Between Watt and Volt

Relation Between Watt and Volt - Formula, FAQs

Edited By Vishal kumar | Updated on Sep 24, 2024 05:25 PM IST

Watt and volt are two most commonly used key terms in physical sciences and branches related to the same. For someone who is at the beginning of exploring this subject, these two terms might be a bit confusing and they might stumble on questions like what is watt and volt? What is watt formula? How to convert volts to watts or watts to volts? How can we explain the difference between watt and watt hour? How to understand the relation between watt and volt? What is electricity watt that we often talk about in day to day life? What is the difference between watts and volts? Or how many watts in a volt are present? Don’t worry we got you covered! We will cover not just these questions but also the difference between volts and amps, relation between power, voltage and current, volts amps watts, relation between power and voltage.

New: JEE Main/NEET 2027 - Physics Important Formulas for Class 10

JEE Main 2025: Study Materials | High Scoring Topics | Preparation Guide

JEE Main 2025: Syllabus | Sample Papers | Mock Tests | PYQs | Study Plan 100 Days

NEET 2025: Syllabus | High Scoring Topics | PYQs | Crack NEET in 2 months - Study Plan

This Story also Contains

What is watt?
What is volt?
Difference between volt and watt
Volts vs amps
Watts vs amps

Relation Between Watt and Volt - Formula, FAQs

Before moving onto the volt and watt difference, we need to first define the term watt and volt.

What is watt?

Watt is a unit of measuring power. Watt is named after an eighteenth century Scottish inventor, James Watt. Watt is equivalent to kg⋅m²⋅s⁻³ and also equivalent to Joule/sec. The symbol of watt is W.

Also read -

What is volt?

Volt is a unit of measuring electric potential, electromotive force and electric potential difference; also called voltage. Volt was named after Alessandro Volta, an Italian physicist. Watt is used to measure the rate of energy transfer.

Watt formula

We could also define the term watt as the rate at which work is done when an object with constant velocity of one meter per second is held against an opposing constant force on one newton.

Watt = Joule / sec = Nm / sec = kg.m²/ s³

In electromagnetism, when a current of one ampere flows through a potential difference (voltage) of one volt, the rate at which electrical work is done is said to be one watt.

Thus, the volts amps watts formula can be written as,

Watts = volts x amps

This formula is used to convert watts to volts and explains the power and voltage relation. This is how we can replace volts and amps to watts. This also gives the relation between v and w.

1 W = V²/ Ω = 1 A²Ω

Here Ω is the unit of resistance.

Related Topics Link,

Volt formula

When an electric current of value one ampere expends one watt of power between two points of a conducting wire, the electric potential developed between these two points is said to be one volt. In other words, volt is the potential difference between 2 points that expend one joule of energy when one coulomb of charge passes through these two points. Volt can be expressed as:

V = J/C = kg.m² /A.s³

Volt can also be expressed in ampere x ohm, Webbers / sec, watts / ampere, or Joules / coulomb.

Difference between volt and watt

Parameters	Watts	Volts
Definition	SI unit of power.	SI unit of potential difference and electromotive force EMF
Formula	Watts = volts x amps	V = Joules / Coulomb
Unit	Power	EMF & voltage
Symbol	W	V
Measurement	Gives realistic measurement of power	Gives small portion of voltage from source
Measurement difficulty	Difficult	Easy
Measuring device	Power meter	Voltmeter
Unit derived from SI units	kg.m²/ s³	kg.m² /A.s³

JEE Main Highest Scoring Chapters & Topics

Just Study 40% Syllabus and Score upto 100%

Download E-book

This table describes the difference between volt and watt. Now let’s discuss the difference between watts and amps and the difference between volts and amps.

Volts vs amps

Volt	Ampere
SI unit of potential difference and electromotive force.	SI unit of current.
Symbol is V.	Symbol is A.
V = Joules / Coulomb	A = charge / sec
Measured by voltmeter.	Measured by ammeter.
In base unit it is kg.m² /A.s³	Ampere is the base unit itself.

Also Read:

Watts vs amps

Watt	Ampere
SI unit of power.	SI unit of current.
Symbol is W.	Symbol is A.
Watts = volts x amps	A = charge / sec
Measured by Power meter	Measured by ammeter.
base unit it is kg.m² / s³	Ampere is the base unit itself.

Some conversions

1 volt watt – to write 1 volt in watt following formula, Watts = volts x amps.
1 ampere watt - to convert 1 ampere into watt following formula is used Watts = volts x amps.
Kw to volts – 1000 W = 1 kW.

These conversions give the relation between power voltage and current.

Also check-

NCERT Physics Notes:

Frequently Asked Questions (FAQs)

1. 1 volt is equal to how many watts?

To convert 1 volt into watt the following formula is used Watts = volts x amps.

2. What is watts in electricity?

3. How to find watts when voltage and current is given?

Watts = volts x amps is the formula used to establish a relationship between watts, volts and ampere. Since, volt is the SI unit of voltage and ampere SI the unit of current. The product of values of amperes and volts will be equal to watt or power of the system.

4. Write: a. Watts to volts formula b. Power and current relation

In electromagnetism, when a current of one ampere flows through a potential difference (voltage) of one volt, the rate at which electrical work is done is said to be one watt.

Thus, the volts amps watts formula can be written as,

Watts = volts x amps

This formula is used to convert watts to volts and explains the power and voltage relation. This is how we can replace volts and amps to watts.

Volt can also be expressed in ampere x ohm, Webbers / sec, watts / ampere, or Joules / coulomb.

5. What is volt amp?/What is a volt amp?

To measure the apparent power in an electric circuit (usually AC circuits), the unit volt-ampere is used.

6. Difference between watt and watt hour?

Power = work / time

Watt hour is the unit of work whereas watt is the unit of power.

7. What is electricity watts conversion?

One unit of electricity means one kilowatt hour of electricity.