Electromotive Force Calculator - Electrical Calculator

The electromotive force (e.m.f) or is the energy provided by a electrochemical cell or battery per coulomb of charge passing through it, Usually e.m.f is measured in unit of volts (V).

EMF Formula:

Electromotive Force, volts = (Current, amps) * (Resistance, ohms)

Electromotive Force Calculator

Enter Current :	(amps)
Enter Resistance :	(ohms)
Electromotive Force (E.M.F):	(volts)

Voltage Dropping Resistor Calculator

Dropping Resistor Calculator

Starting Voltage of the Circuit	Volts
Needed Voltage	Volts
Current Draw	Amps
Required Dropping Resistor in Series	Ohms
The Minimum Resistor Wattage

• Starting Voltage - The starting voltage of the circuit. This is in Volts

• Needed Voltage - The voltage that is needed, which is lower then what you have.

• Current Draw - How much does this device circuit to draw the voltage in AMPS

• Required Dropping Resistor - The Series Resistor in ohms (Ω)

• Minimum Resistor Wattage - The Minimum resistor wattage, this is actually what the circuit draws so you should use a larger value to keep the resistor from over heating.

Formula:
Calculate Resistor Wattage from the Current and Resistance using another of Ohm's Formula

P = I²R
Where,
P = Power in Watts
I = Current in Amps
R = Resistance in Ohms


Calculate the needed Resistance using one of Ohm's Formula
R = V / I

Where,
R = Resistance in Ohms
V = Force in Volts
I = Current in Amps

Wire Size Calculator

The wire size calculator will give you a simple solution for to choose size of wires and cables for pump applications in golf courses, landscape projects, and agriculture.

Formula:

For single-phase circuits:

• Wire Circular Mils = (Conductor Resistivity)(2)(Amps)(One Way Distance in Feet) /

                                             Allowable Voltage Drop

For 3-phase circuits:

• Wire Circular Mils = (Conductor Resistivity)(2)(Amps)(One Way Distance in Feet)(.866) /

                                            Allowable Voltage Drop

Wire Size Calculator

   

Wire Type:	Copper Aluminum
Source Voltage:	Single Phase Three Phase
Power Input:	120 Volts 208 Volts 240 Volts 277 Volts 480 Volts
Distance in feet, one-way :
Total amperage of circuit :
Minimum Wire Size:

American Wire Gauge (AWG) Wire-Size Chart

American Wire Gauge (AWG) Wire-Size Chart

AWG #	Diameter (inch)	Diameter (mm)	Area (kcmil)	Area (mm2)
0000 (4/0)	0.4600	11.6840	211.6000	107.2193
000 (3/0)	0.4096	10.4049	167.8064	85.0288
00 (2/0)	0.3648	9.2658	133.0765	67.4309
0 (1/0)	0.3249	8.2515	105.5345	53.4751
1	0.2893	7.3481	83.6927	42.4077
2	0.2576	6.5437	66.3713	33.6308
3	0.2294	5.8273	52.6348	26.6705
4	0.2043	5.1894	41.7413	21.1506
5	0.1819	4.6213	33.1024	16.7732
6	0.1620	4.1154	26.2514	13.3018
7	0.1443	3.6649	20.8183	10.5488
8	0.1285	3.2636	16.5097	8.3656
9	0.1144	2.9064	13.0927	6.6342
10	0.1019	2.5882	10.3830	5.2612
11	0.0907	2.3048	8.2341	4.1723
12	0.0808	2.0525	6.5299	3.3088
13	0.0720	1.8278	5.1785	2.6240
14	0.0641	1.6277	4.1067	2.0809
15	0.0571	1.4495	3.2568	1.6502
16	0.0508	1.2908	2.5827	1.3087
17	0.0453	1.1495	2.0482	1.0378
18	0.0403	1.0237	1.6243	0.8230
19	0.0359	0.9116	1.2881	0.6527
20	0.0320	0.8118	1.0215	0.5176
21	0.0285	0.7229	0.8101	0.4105
22	0.0253	0.6438	0.6424	0.3255
23	0.0226	0.5733	0.5095	0.2582
24	0.0201	0.5106	0.4040	0.2047
25	0.0179	0.4547	0.3204	0.1624
26	0.0159	0.4049	0.2541	0.1288
27	0.0142	0.3606	0.2015	0.1021
28	0.0126	0.3211	0.1598	0.0810
29	0.0113	0.2859	0.1267	0.0642
30	0.0100	0.2546	0.1005	0.0509
31	0.0089	0.2268	0.0797	0.0404
32	0.0080	0.2019	0.0632	0.0320
33	0.0071	0.1798	0.0501	0.0254
34	0.0063	0.1601	0.0398	0.0201
35	0.0056	0.1426	0.0315	0.0160
36	0.0050	0.1270	0.0250	0.0127
37	0.0045	0.1131	0.0198	0.0100
38	0.0040	0.1007	0.0157	0.0080
39	0.0035	0.0897	0.0125	0.0063
40	0.0031	0.0799	0.0099	0.0050

Convert Amps to Kilowatts (kW) | Electrical Calculators

DC Amps to Kilowatts Formula:

P_(kW) = I_(A) × V_(V) / 1000

AC Single Phase Amps to Kilowatts Formula:

P_(kW) = PF × I_(A) × V_(V) / 1000

AC 3 Phase Amps to Kilowatts Formula:

P_(kW) = √3 × PF × I_(A) × V_{L-L (V)} / 1000

Amps to Kilowatts (kW) Converter Tool

	Select Current Type:	DC AC - Single phase AC - Three phase
	Enter Voltage:	V (volts)
	Enter Current:	A (Amps)
	Enter Power Factor:
	Power:	kW (kilowatts)