It means you must first get the Ah rating. "C" Rating is the Battery Charge or Discharge Rate. The result is the number of hours you can expect your battery to last.

For information on how this calculator works see How to calculate the Watt Hours (Wh) of a lithium battery. VA to Watts calculator. A 48v 20ah battery, for example, has 960 watt hours (48 * 20 = 960). Other chemistries, such as LiFe & LiMh batteries will be different. Actually, watts is the fundamental unit of power and watt-hours is the energy stored. Formula: 1 Wh = 1 Ah * 1 V Voltage (V) * E = V*Q (As current rate over time is equal to the charge flowing through battery) The same equation is utilised by our amp hours calculator to calculate battery Ah. What size battery do I need. Example 1: Must calculate the watt-hour capacity of a car battery having a voltage of 12 volts and capacity of 60Ah. With 50% Depth of Discharge (DOD) Safety Net . TABLE FAN - 50 W. CEILING FAN - 75 W. ROOM COOLER - 250 W. 50Ah in watt-hours = 50Ah x 12 volts = 600 watt-hours 100Ah battery run time = available capacity / load / inverter efficiency, so A 100Ah battery will run a fully-loaded 100 watt inverter for = 600 / 1000/ 0.95 = 0.63 hours How many hours can a 100ah battery last running A Fridge? Enter the Watt Hours and Watts to calculate your battery life in hours. Battery Size: I have this (app) application and I need it to run for (X) hours, what size battery will I need? To calculate the energy capacity in Watt-hours, you need to know the battery's voltage, measured in Volts, and its charge capacity, measured in amp-hours or milliamp-hours (1000 mAh = 1 Ah). If you are nitty with your energy usage, each mile you travel will cost you about 20 watt hours. Battery watt-hours = amp-hour capacity x battery volts Battery watt-hours = 50Ah x 12V = 600 watt-hours Due to the discharge maximum of 80% only 480 watt-hours are available for use. To calculate the watt hours (WH) of a battery pack, simply multiply the voltage by the amp hours (Ah) of the pack. 1 joule is equal to 1.0E-6 MJ, or 2.7777777777778E . Watt hours are calculated by multiplying the volts by the Amp-hours. kVA to Watts calculator. See Also: Amps to Watts calculator. Battery capacity is typically measured in Amp-hours (Ah) or milliamp-hours (mAh), although Watt-hours (Wh) is occasionally used. Watt hours are calculated by multiplying the volts by the Amp-hours. 200 Watts/12 = 16.6. amps. Abbreviated: W = kWh 1000 hrs. This battery life calculator estimates how long a battery will last, based on nominal battery capacity and the average current that a load is drawing from it. 1 mWh = 0.001 Wh. To calculate watt hours of a battery, multiply amp hours times volts. Example 2: Must calculate the ampere-hours of a battery to have 100 watt-hour capacity at 7.2 volts. Oven. Formula: watts = kilowatt hours 1000 hours. For a more precise estimate of electric bike range, we have developed a detailed ebike range calculator which has 16 Separate Inputs and Over 100 Variants. So, at 20 watts per mile, the bike will go 48 miles each charge. #1200mAh is the same as 1.2Ah. While a 12V 50Ah battery calculation is 50 Ah x 12 volts = 600Wh. Buy 6 Ah / 75-watt hour lithium battery for running dc loads, home lighting system, and mobile charging. For example, say you want to run a 250 watt 110VAC light bulb from an inverter for 5 hours. . Wh = Ah x Voltage, where 1kW = 1000W.

Formula: watt hours = amp hours volts. For example, let's say you have a 24V 200Ah LiFePO4 battery. For sure, the backup may lasts up to 4.8 hrs at 100% efficiency. View example. Amperes measure how much electricity flows in a battery per second, while voltage is the amount of energy an electric circuit gets, which is usually fixed (6V, 12V, 36V, etc. Here's how to calculate its watt hours: 12 V 50 Ah = 600 Wh. A bike riding 25 mph on its own will require 20-25 watts each mile. Enter the Voltage and the Ampere-hours. We strongly suggest that you check the following tutorial about Battery Life and its calculations. You simply divide 1,200Wh by 400W and get 3 hours. So a 36 volt 10-Ah pack has 360 watt hours and a 52V 10-Ah pack has 520 watt hours. Abbreviated: Wh = Ah V. Calculator: Amp Hours to Watt Hours Calculator. Second, many types of computer equipment consume less power than they did a few years ago so typical systems run longer. Run time = 480Wh/1000W = 0.48 hours or 28.8 minutes Applying the 95% inverter efficiency the run-time = 0.45 hours or 13 minutes If you don't know the Watts or Watt-Hours, use the formulas below. E = CXV avg E = C X V a v g. E is energy stored in watt-hours, C is the capacity in amp-hours, and Vavg is the average voltage during the energy discharge. E(Wh) = P(W) t(h) The energy E in watt-hours (Wh) is equal to the power P in watts (W), multiplied by the time period t in hours (h). The watt-hour is not directly measured on a car battery, so to get this, you need to multiply the number of amperes with the battery voltage. This battery life calculator estimates how long a battery will last, based on nominal battery capacity and the average current that a load is drawing from it. Literature & Brochures; . You can now calculate as - 4.4Ah x 11.1 volts = 48.8Wh. Enter the Watt Hours and Watts to calculate your battery life in hours. Apologies to the metric users - I put km conversions within, but you'll need to convert your final score to Wh/km by dividing it by 1.609 or ask google to do it for you.

If you want to select a UPS to meet load and runtime calculators please use the UPS . For individual batteries enter the Volts rating of the battery and the Watt hours rating of the battery and click on the calculate button to . Watt-hours = watts * hours / efficiency = 1250 / 0.85 = 1470 watt-hours Since watts = amps * volts divide the watt hours by the voltage of the battery to get amp-hours of battery storage Amp-hours (at 12 volts) = watt-hours / 12 volts = 1470 / 12 = 122.5 amp-hours. The battery will last 2 hours. FANS AND COOLERS. View example. ). The typical . How long will a 17ah battery last? It is 4400/1000= 4.4ah. If you do not know, you will need to contact the manufacturer to find out. Wh = Ah x Voltage, where 1kW = 1000W. You might only get 80 or 90 amp-hours out of that same battery. This value is commonly expressed in amp-hours - amps (units of electric current) multiplied by hours (units of time).

This needs a value. 100ah battery in watts = 100 * 12 = 1200 watt-hours. It is zero maintenance & long-lasting product. So we calculate the power capacity as Volts times Amps times hours equals capacity in Watt-Hours. by using the watts formula, you can check and calculate the accurate electric measurements of your tool. Click "Calculate" and the result in Watt-hours will appear below. There are three reasons why the UPS Selector indicates longer run time. 20 minutes. for 3.7V 10W deviceworking current would be 103.7 = 2.7027A = 2702.7 mA The amp-hour how much charge is stored in a battery multiplied by the average battery voltage will provide an estimate of how many watt-hours a battery contains. Battery capacity is typically measured in Amp-hours (Ah) or milliamp-hours (mAh), although Watt-hours (Wh) is occasionally used. Voltage. Here the formula will be Battery (day) = Capacity (Ah) / 24 x I (Ah) Battery (month) = Capacity (Ah) / 30 x I (Ah) Battery (year) = Capacity (Ah) / 365 x I (Ah) example 2: a 12 volt 50 Ah battery - 50 Ah x 12 volts = 600Wh. 2S2P 18650 pack that's 7.4V 5.2Ah battery pack. A 36-volt 10-Ah battery pack has 360 watt hours (36 X 10 = 360). Finally, because the price of the 36 Wh battery is just $59, the cost per Wh is only $1.64. Here is the formula. E(Wh) = Q(mAh) V(V) / 1000 So watt-hours is equal to milliamp-hours times volts divided by 1000: watt-hours = milliamp-hours volts / 1000 or Wh = mAh V / 1000 Wh to mAh calculator See also How to convert mAh to Wh Wh to mAh calculator mAh to Ah calculator Energy consumption calculator Power conversion Write how to improve this page The key is to use the watts you know to calculate the amps at the battery voltage . For ten hours, that's a total of 410 amps pulled. These figures can typically found on any battery's data sheet. For the $49 22 Wh battery that cost per Wh drops to $2.23. Here is the formula Battery Life = Watt Hours / ( Voltage x Current in Ampere) You may also like to check Watt Hour Vs Ampere Hour if the battery capacity has been defined as Watt Hour.

If you need it our Lithium battery watt hour calculator will work out your results for you. A 4400 mAh battery with ll.1volt means divide the rating mAh by 1000. Many 18650 battery packs may consist of a combination of series (S) and parallel (P) connections. V. Volts (V) the difference of potential that would drive one ampere of current against one ohm resistance. Let's say you have a 12V 50Ah car battery. Enter the number of battery blocks in the UPS (1-1000). mAh = Whr x 1000 / Volts. Watt-hours = Watt * Hours Watt-hours = Volt * Ampere * Hours In some of the batteries, the value of the current is given in milliamperes so in that case, you need to divide the value with 1000 and the formula comes out to be: Energy = Voltage * (Current / 1000) * Time in hours 1 x 0.001 Wh = 0.001 Watt Hour. A 4400 mAh battery with ll.1volt means divide the rating mAh by 1000. Whr= Volts x mAh / 1000. let's say you have a 12v 100ah battery. It requires 2 separate AH ratings at different hour ratings. So divide the mAh rating by 1000. 456 Watts will pull ~41 amps from a 12v battery source per hour. The Formula for Estimating Laptop Battery Life. For Laptop batteries with 11.1V 4.8Ah battery pack, it commonly has three 3.7V 18650 battery cells in series (3S) to achieve a nominal 11.1 V and two in parallel (2P) to boost the capacity from 2 . In other words, a 100-Ah battery could discharge 5 amps per hour for 20 hours for a total of 520=100 amp-hours! Example. i.e. 0.380 amps x 120 volts = 45.6 Watts, not 23w. Example 3: Must calculate the voltage of a battery having 80mAh and 288mWh. In this video from Learn Electrics we will look at this measurement called AMP HOURS and its close neighbour, the WATT HOUR. Measure the amperage in your area and then install electrical appliances. In short, a 100Ah 12V battery will run a 400W appliance for 3 hours. Battery capacity is typically measured in Amp-hours (Ah) or milliamp-hours (mAh), although Watt-hours (Wh) is occasionally used. So a 36 volt 10-Ah pack has 360 watt hours and a 52V 10-Ah pack has 520 watt hours. Here's how to calculate the total watts available to use: (3 kWh 6 hrs) 1000 = 500 W So the amount of power available for your workspace during this 6 hour period is 500 watts. Keep in mind - you can change power output by changing the pedal assist levels - so choose the power level you will use the most often. Application Load (Ah): Application Runtime (Hours): Battery Type: Gel Flooded (Lead Acid) AGM (Sealed Lead Acid) All Others.