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NOTE: Mark decimals with point notation (3,7 = 3.7).

Ohm’s law and Joule’s laws Calc

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Voltage (V) Current (A)
Resistance (Ω) Power (W)


How to use?

Just enter 2 known values and click Calc!.
Example, to calc the power using a LR carto with a eGo battery: generally eGo batteries are regulated to about 3.2V so we put 3.2 for the Voltage and as for Resistance the carto value (like 1.5). Then click Calc!.

Electrical resistance (coil) Calc

Voltage (V) 3.2V 3.7V 5V 6V 7.4V
Resistance (Ω)
Power (W)


How to use?

Just insert the Power/Watts value you want to achieve then click Calc! to get the coil values needed to obtain that in the several voltages.

About The Author

Site Staff // Vaper // Modder // Reviewer

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15 Responses

  1. Ruben A.

    Boas calculadoras para quem ainda não está dentro da lei de Ohm (como eu eheh), e facilita também para não se andar a fazer contas.


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