Watts to Joules calculation  Online Electrical Calculators
Watts (W) to Joules (J) Calculator.
Enter the Real Power (P) in Watts (W), consumption time period in seconds, and press the Calculator button to get the Energy (E) in Joules (J):
Advertisements
Note, For higher values like 5×10^{3}, 10×10^{6}, 1.6 x10^{12}, enter the value like this for scientific notation as 5e3, 10e6, 1.6e12, etc.
Conversion Using the Power Formula :
AC Single Phase Watts to Joules Calculation:
The Energy (E) in joules (J) is equal to the Real Power (P) in watts (W), times the time period t in seconds (sec):
For example, The Energy (E) consumption of an electrical circuit that has a Real power (P) consumption of 50 watts for a time duration of 6 seconds.
J = 50 × 6
J = 300
Where:

 E = Energy in Joules (j)
 P = Real Power in Watts (W)
 T = time in seconds (sec)
Advertisements
How to use This Calculator?
To use the above “Watts (W) to Joules (j) Conversion Calculator” follow the below steps:
1. Enter Real Power: Input the Real Power in watts or motor watts value in the specific input box. You can enter the value in watts or kilowatts by choosing the appropriate option from the dropdown.
2. Enter Time: Input the time in hours value in the specific input box. You can enter the value in hours or seconds by choosing the appropriate option from the dropdown.
3. Reset: If you want to “reset” the calculator to perform another conversion, you can click the “Reset” button, and all input fields will be cleared.
4. Calculate: Click the “Calculate” button to obtain the results. The calculated results will be displayed in the “Results:” section.
5. Swap: If you want to “Swap” the calculated to Exchange conversion, you can click the “Swap” button, and Calculate will be Exchange.
5. Result: The calculated “result” will be displayed in the respective “Result In joules (j)” output field.
Watts to Joules Conversion table:
Watts (W)  Joules (J)  

1W  20J  
5W  100J  
10W  200J  
15W  300J  
20W  400J  
25W  500J  
30W  600J  
35W  700J  
40W  800J  
45W  900J  
50W  1000J  
55W  1100J  
60W  1200J  
65W  1300J  
70W  1400J  
75W  1500J  
80W  1600J  
85W  1700J  
90W  1800J  
100W  2000J  
watts for a duration of 20 seconds 
Frequently asked questions
1 Joule (Joule per second) = 1 watts (w).
energy in joules for a 140watt power consumption over 20 seconds: E(J) = 140 W × 20 s = 2800 J
The watts to joules formula is:
E_{(J)} = P_{(W)} × T _{(s)}
E_{(J)} = 100 W × 50 s
E_{(J)} = 5,000 J
Power: energy (E) provided per unit of time. Energy is measured in joules (J) and Real power is measured in Watts (W). A watt is equal to a joule per second.