Battery Watt-hour Calculator- Calculating and Amp-hour Conversion

May 27, 2020   Pageview:71

The battery limit is the measure of energy stored in a battery. It reveals to you how much power the battery can give you, and for what length of time.

All Deep Cycle batteries are rated in Amp Hours (AH). An ampere-hour (abbreviated Ah, or some of the time amp hours) is the measure of vitality charge in a battery that will permit one ampere of current to flow for 60 minutes. An ampere is a unit of measure of the pace of electron flow or flows in an electrical conductor.

Battery Capacity in Watt-hour (Wh) or kiloWatts-hour (kWh)

Every battery has a maximum power limit that can be drawn from it at some random purpose of time. It is given as a piece of battery specification by the manufacturer. The limit of a battery lets us know to what extent it can dispense power at the maximum power limit. In numerical terms, it tends to be characterized as follows:

Capacity= Power X Duration

This implies that if we draw less power, the battery will last longer. Power is calculated in kilowatts (kW) and capacity is estimated in terms of kWh (kilowatt-hour).

Battery Capacity in Ampere-hour (Ah)

You understand that power is estimated in amperes. So the battery limit is likewise estimated as far as ampere-hour (Ah). Here,

Capacity= Electricity X Duration

Ampere-hour is an all the more generally utilized unit of figuring battery limit.

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How do you calculate battery watt-hours?

In case you're a recreational vehicle owner, knowing to what extent your battery will give power is significant. And that's because your battery will power all your electronic devices.

So to prevent a smaller than expected power outage when you least expect it, learn to calculate what extent your battery will last before it should be revived. To do that, total the watt-hours that every one of your apparatuses and gadgets uses. When you know that number and your battery's watt-hour rating, you will have the data you have to prevent shock power blackouts.


Calculate the watt-hours for each electronic gadget. For every device, multiply the device watt rating by the average number of hours the devices are on for the set timeframe. For example, if your PC was evaluated at 20 watts and was on three hours per day, it would utilize 60 watt-hours of energy every day.

Calculating kilowatt-hours is as simple as figuring watt-hours. To get from kW-hr to W-hr, multiply by 1,000; to go from W-hr to kW-hr, by a long shot the more typical unit, divide by 1,000.

Sum the Watt-Hours

Include the watt-hours for each of the devices. The total number of watt-hours that your battery should flexibly over the set timespan is equivalent to the sum of the watt-hours that every one of your gadgets uses. For example, if your PC required 5 watt-hours per day and your fan required 5 watt-hours per day, you would require 10 watt-hours of vitality every day.

Further, if your electronic devices required 10 watt-hours of the day and these gadgets needed to be powered for 10 days, the complete watt-hours your battery must supply over the 10-day time frame would be 100 watt-hours- - that is, 10 multiplied by 10. This implies you would require a battery that was rated at 100 watt-hours to guarantee that you had power over the 10-day time frame.

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What number of amp-hours are in a watt-hour?

Converting from amp-hours to watts or the other way isn't as simple a procedure as you would assume because they measure various things. Amp-hours measure a measure of current, while watt-hours are a measure of electrical power. Be that as it may, you should simply convert over watts to watt-hours, and afterward you can use a basic equation to change over watt-hours to amp-hours. Before finishing the count, you have to comprehend what the terms mean and find out the voltage of the battery.

Amp-Hours and Watts Defined

An amp-hour (Ah) tells you the measure of current a battery can give over a specific amount of time, and a rating (ordinarily in amp-hours or milliamp-hours) is utilized to give you a thought of to what extent a battery can provide a given amount of current. Amp-hours are determined by multiplying the number of amps (An) a battery gives by the release time in hours (h). So, if a battery gives 10 amps of current to 10 hours, it is 10 amps × 10 hours = 100 Ah battery.

Amp-Hours to Watts Equation

There isn't an equation for amp-hours to watts directly, yet with watt-hours, you can utilize the basic relation:

Amp-hours × Volts = Watt-hours

In this way, to get amp-hours from watt-hours, you use:

Watt-hours ÷ Volts = Amp-hours

How do you use a battery watt-hour calculator?

Battery Capacity Formula

The power P of an electrical device is equivalent to voltage V multiplied by the current I:

P = V * I

As vitality or energy E is power P multiplied by time T, all we need to do to find the energy put away in a battery is to multiply both sides of the equation by time:

E = V * I * T

Amp-hours are a proportion of electric charge Q (the battery capacity). Henceforth, the last form of the battery limit formula looks like this:

E = V * Q


E is the energy stored in a battery, expressed in watt-hours;

V is the voltage of the battery;

Q is the battery capacity, estimated in amp-hours.

How to calculate amp hours?

Let's assume you need to discover the limit of your battery, knowing its voltage and the energy stored in it.

Note down the voltage. In this example, we will take a standard 12V battery.

Pick the amount of energy stored in the battery. Suppose it's 26.4 Wh.

Input these numbers into their separate fields of the battery amp hour calculator. It utilizes the formula mentioned above:

E = V * Q

Q = E/V = 26.4/12 = 2.2 Ah

The battery limit is equivalent to 2.2 Ah.

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