Ampere or amp is a measurement of electrical current, amps represent the rate at which electricity flows.Ohms is a unit of electrical resistance, the greater the ohms the more difficult it is for current to flow.Watt calculation/conversion formulas:watts = volts² / ohms...
How to Calculate Watts from Volts and Amps in Direct Current When working with DC, it is important to understand the relationship between amps and watts. Watts (W) is a unit of power that measures the rate at which energy is being used or produced, while amps (A) are a unit of curre...
The currentIin amps is equal to the powerPin watts divided by the product of the line-to-line voltageVin volts, the power factorPF, and the square root of 3. This formula calculates the current draw for a single pair of wires in three-phase systems. You will need to multiply the resu...
Based onOhm’s Law, this formula works on the principle that the speed of electrical current (Amps) equals the ratio of power (watts) to pressure (volts). For example, a typicalEnergy Star-ratedrefrigerator requires 600W of running wattage. Almost all home appliances in South Africa operate ...
To find the amperage of a current based on the number of millivolts, you will need to know the number of watts produced by the current. Once you know the number of millivolts and watts, you can use the basic power conversion formula "Watts = Volts x Amps" to find the number of am...
In theory, you can calculate the run-time for any of your battery's accessories by dividing the amp-hour rating of the battery by the amp draw of the accessory. You might have to convert from watts first. For instance, if you want to know how long you can bang a 1,000-watt stereo...
The watts equation for an electrical circuit takes into account the voltage across the circuit V, measured in volts, and the current I, measured in amps, passing through it. In mechanics, the definition of power is the rate of doing work W. It's defined as W...
The equation iswatt-hours = amp-hours x volts. In this instance, if you don’t know the number of watts, you’ll multiply the total number of amp-hours times the voltage. → Need a quick refresher? Check outAmps, Volts, and Watts: Differences Explained ...
Electrical and mechanical power calculation (strength) Power Formula 1– Electrical power equation:PowerP=I×V=R×I2=V2⁄R where powerPis in watts, voltageVis in volts and currentIis in amperes (DC). If there is AC, look also at the power factorPF= cosφandφ= power factor angle ...
If you know the watts go to Step A below. Step 1. Back of the envelope If the current drawn is x amps, the time is T hours then the capacity C in amp-hours is C = xT For example, if your pump is drawing 120 mA and you want it to run for 24 hours C = 0.12 Amps * 24 ...