6 Best Free Online OHMs Law Calculator Websites

Here is a list of best free online OHMs law calculator websites. Ohms law states that current through a conductor between two points is directly proportional to the voltage across the two points. In mathematical terms, it is described as Current (I) = Voltage (V)/ Resistance (R). Using ohms law, users can find out the voltage, current, power, impedance, etc., values. To do that, these websites use variations of the original Ohms formula and at least two input values. Input values can be voltage and current, power and current, impedance and voltage, etc., according to the output you seek. Besides this, these websites also offer calculation explanations along with resistive circuit diagrams in some cases.

The process to perform the ohms law calculation is quite simple on all these websites. Still, to help you out, I have included the necessary ohms law calculation steps in the description of each website. Through some websites, users can perform ohms law calculations for both AC and DC-based circuits. Apart from ohms law calculation, users can also perform voltage divider calculations, LED resistance calculations, Financial calculations, etc. Go through the list to know more about these websites.

My Favorite Online Ohms Law Calculator Website:

RapidTables is my favorite website as it can perform ohms law calculations from both AC and DC resistive circuits.

You can also check out lists of best free Online Factor Calculator, Online Hash Calculator, and Online Electricity Cost Calculator websites.

RapidTables

RapidTables is a free online ohms law calculator website. Using this website, users can calculate any two parameters of the ohms law equation from four available ones namely Resistance, Current, Voltage, and Power. To perform the calculation, it uses the standard Voltage = Current * Resistance ohms law equation. Now, follow the below steps to perform ohms law calculation using this website.

How to perform ohms law calculation using RapidTables website:

• Start this website and go to its Ohm’s Law Calculator.
• After that, enter any two values of the ohms equation to find out the remaining two values. For example – enter resistance and current values to find out the voltage and power values.
• Lastly, click on the Calculate button to start the calculation process.

Additional Features:

• AC Ohm’s law Calculator: Through this tool, users can calculate impedance, current, voltage, and power values of an AC resistive circuit.
• Additional Tools: A good set of additional tools like a voltage divider, watts to amps, KW to amps, electric current, etc., are also present on it.

Final Thoughts:

It is one of the best free online ohm’s law calculator websites through which users can calculate ohm’s law entities.

ohmslawcalculator.com

ohmslawcalculator.com is a free online ohms law calculator website. Through this website, users can calculate the Resistance and Power using input voltage and current values. To perform the calculation, this website uses the ohms law formula which is Voltage (V) = Current (I) *  Resistance(R). Now, follow the below steps to perform calculations using ohms law.

How to perform ohms law calculation using ohmslawcalculator.com:

• Launch this website and open up its Ohm’s Law Calculator.
• After that, enter the Voltage and Current values in their respective fields.
• Next, click on the Calculate button to view the calculated Resistance and Power (Watts) values.

Additional Features:

• This website also offers additional calculators through which users can perform voltage divider calculations, LED resistance calculations, 555 monostable calculations, and more.

Final Thoughts:

It is another good online ohms law calculator website that uses ohms law to calculate the Resistance and Power values.

Calculator.net

Calculator.net is another free online ohms law calculator website. This website offers a standard ohms law calculator tool that can calculate and find out any two entities of the ohms law from four available ones namely Voltage, Current, Resistance, and Power. Before starting the calculation process, users can adjust the SI units (volt, kilovolt, amperes, milliamperes, etc.) of entities. Now, follow the below steps to start the ohms law calculation.

How to perform ohms law calculation using Calculator.net:

• Visit this website and enter the values of any two entities like voltage and current, current and resistance, etc.
• After that, choose the SI units of all the entities.
• Next, click on the Calculate button to start the calculation and get the output values.

Additional Features:

• Other Calculators: This website offers multiple additional calculators through which users can calculate grade, time, GPA, age, etc.
• Financial Calculators: It provides many financial calculators such as auto loan, real estate, rent, payment, and more.

Final Thoughts:

It is another good online ohms law calculator website through which users can find out any two entities of a resistive circuit.

electrical4u.net

electrical4u.net is the next free online ohms law calculator website. Through this website, users can perform ohms law calculations for both DC and AC resistive circuits. It also lets users manually change the SI units of entities like ohms, kiloohms, megahomes, amps, kiloamps, etc. Now, follow the below steps to perform the calculation and find out the values of any two entities by providing the values of at least two entities.

How to perform ohms law calculation using electrical4u.net:

• Start this website and enter the values of two input parameters from 4 available ones namely Resistance (for DC) or Impedance (for AC), Voltage, Current, and Power.
• Next, click on the Calculate button to initiate the calculation process.
• Lastly, view and copy the output ohms law calculation result.

Additional Features:

• Calculators: On this website, users can also find additional calculators like battery life calculator, torque converter calculator, circular waveguide calculator, skin depth calculator, and more.

Final Thoughts:

It is another capable yet simple to use online ohms law calculator that anyone can use without much hassle.

Digi-Key

Digi-Key is another free online ohms law calculator website. It is another good website through which users can use ohms law to find out the values of resistive circuits only by providing values of two entities. It also helps users understand the relationship between all four ohms law entities namely Power, Volts, Ampere, and Resistance. Now, check out the below steps.

How to perform ohms law calculation using Digi-Key:

• Start this website and go to the Ohms law calculator section.
• After that, enter values of two resistive circuit entities like voltage and current, resistance and power, current and resistance, etc.
• Lastly, hit the Calculate button to find out the values of the two remaining entities.

Additional Features:

• This website comes with multiple circuit calculators through which users can calculate LED Series Resistance, Parallel and Series Resistance, Reactance, etc.

Final Thoughts:

It is a simple and effective ohms law calculator website that anyone can use without putting in much effort.

calculatorhut.com

calculatorhut.com is another free online ohms law calculator website. This website offers two separate ohms law calculators. One calculator is based on Resistance and another one is based on Power. The Resistance-based calculator can find out the Resistance, voltage, and current values. The Power-based calculator can find out current, voltage, and power values using ohms law and values of two entities. Now, follow the below steps.

How to perform ohms law calculation using calculatorhut.net:

• Go to this website and open up the ohms law calculator that you can find under the Physics section.
• After that, choose either Resistance or Power-based calculator and enter the values of two entities like current and voltage, resistance and current, current and power, etc.
• In the end, click on the Calculate button to get the value of the entity that you want to find using the ohms law.

Additional Features:

• This website offers multiple online calculators for Maths, Finance, Physics, and Chemistry-based problems.

Final Thoughts:

It is another good online ohms law calculator website that offers all the essential tools to find out the entities of a resistive circuit using ohms law.