# 10 Best Free Online LM317 Calculator Websites

Here is a list of best free online LM317 calculator websites. LM317 is a liner voltage regulator IC used in electronic circuits to provide a stable output voltage. The voltage of LM317 ICs can also be adjusted, thus used for power regulation in various applications. The LM317 also has internal current limiting and thermal shutdown features, which protect the device from overcurrent conditions. LM317 has three main parameters namely Resistance R1, Resistance R2, and Output Voltage (Vout). If you want to calculate LM317 parameters, then check out these online LM317 calculator websites.

Using these websites, users can quickly calculate the Resistance (R1 and R2) and Output voltage of LM317 ICs. To do that, users need to enter the values of any two parameters to find the third one. These websites also explain the LM317 IC function and show the formula to calculate LM317 IC parameters. Most of these websites also show LM317 block diagrams with proper markings. Some calculators can provide the calculation steps. I have also included the necessary calculation steps to help out new users.

These websites offer multiple online tools such as Resistor Color Code Calculator, Logic Gate Calculator, SM Resistor Code Calculator, and more. Go through the list to learn more about these calculators.

### My Favorite Online LM317 Calculator Website:

omnicalculator.com is my favorite website as it explains LM317 IC in detail. Plus, it can calculate all three LM317 IC parameters with ease. It shows the formulas that it uses to perform the calculation.

You can also check out lists of best free Online Capacitor Code CalculatorOnline Radar Horizon Calculator, and Online Tire Pressure Calculator websites.

### Comparison Table:

Features/Website NamesCan calculate all three LM317 parametersShows Calculation FormulaShows LM317 diagram
omnicalculator.com
circuitdigest.com
eepower.com
daumemo.com
leaningaboutelectronics.com
reuk.co.uk
circuiteasy.comx
uk.farnell.com
engineering.icalculator.comx
circuitspedia.com

## omnicalculator.com

omnicalculator.com is a free online LM317 calculator website. This website explains LM317 adjustable  DC voltage regulator and shows the steps to perform LM317 calculations. It also shows the diagrams highlighting the LM317 functioning. It even explains the steps to adjust LM317 voltage regulator output voltage. To calculate the output LM317 voltage, users need to enter the values of both the resistors (R1 and R2).  It can also be used to calculate the Resistance R1 and R2 values. The SI units of resistor values can be adjusted between ohms, milliohms, kiloohms, and megaohms units. Now, follow the below steps.

### How to calculate LM317 voltage online using omnicalculator.com:

• Go to this website and access the LM317 Calculator.
• After that, enter Resistor R1 and R2 values.
• Now, specify the resistor and output voltage SI units.
• Finally, view the calculated output voltage values.

### Additional Features:

• This website also offers multiple Chemistry, Constriction, Maths, Finance, and Physics calculators.

### Final Thoughts:

It is one of the best free online LM317 calculator websites that also explains the LM317 voltage regulator and its calculation process.

Pros Cons
Explains LM317 voltage regulator
Shows calculation process
Provides LM317 circuit diagram

## circuitdigest.com

circuitdigest.com is another free online LM317 calculator website. This website offers a LM317 Resistor cum voltage calculator. Through this calculator, users can calculate both the output voltage and resistance of one resistor at a time. Users can also change the units of Resistance parameters. However, the voltage unit is fixed to the volt. It also shows LM317 diagram. Plus, it explains the workings of this LM317 calculator and provides the formula that it uses to perform the LM317 calculations. Now, follow the below steps.

### How to calculate LM317 voltage online using circuitdigest.com:

• Go to this website and access the LM317 Resistor/ Voltage calculator.
• After that, enter R1 and R2 resistance values, if you want to calculate voltage.
• Enter a voltage and one of the resistance values to calculate the resistance of the remaining resistor.
• Finally, click on the Calculate button to view the output.

### Additional Features:

• This website offers multiple electrical and electronic calculators like Coil Inductance, RF power Conversion, Torque, RMS Voltage, Battery Life, and more.

### Final Thoughts:

It is another good online LM317 calculator website that helps users calculate both the resistance and output voltage of an LM317 voltage regulator.

Pros Cons
Can calculate both resistance and voltage values
Shows calculation formula
Explains calculation process

## eepower.com

eepower.com is another free online LM317 calculator website. Using this website, users can calculate the voltage as well as the resistance value of an LM317 voltage regulator. It also shows LM317 diagram and the formula that it uses to perform the calculation. It also provides a brief explanation of LM317. Now, follow the below steps.

### How to calculate LM317 parameters online using eepower.com:

• Visit this website and access the LM317 calculator.
• After that, enter Resistance R1 and R2 values if you want to calculate the output voltage.
• Enter one Resistance value and Voltage value if you want to calculate a resistance value.
• Finally, hit the Calculate button to view the output resistance or output voltage value.

### Additional Features:

• This website also offers tools like Power Calculator, Delta Wye Calculator, battery Life Calculator, thermal Resistance Calculator, and more.

### Final Thoughts:

It is another good online LM317 calculator website that anyone can use to calculate both output voltage and resistance values.

Pros Cons
Can calculate both resistance and voltage values
Shows calculation formula

## daumemo.com

daumemo.com is another free online LM317 calculator website. Through this website, users can calculate the Resistance R1, Resistance R2, and Output Voltage values. It also shows the LM317 circuit diagram and all the formulas that it uses to calculate all three LM317 parameters. The working of this calculator is also explained by this website. Now, follow the below steps.

### How to calculate LM317 parameters online using daumemo.com:

• Visit this website and access the LM317 calculator.
• After that, enter two input values to calculate the third one.
• Next, specify the units of resistance parameters.
• Finally, click on the Calculate button to view the calculated value.

### Additional Feature:

• This website also offers a handy Resistor Color Code value calculator.

### Final Thoughts:

It is another good online LM317 calculator that can calculate both the resistance and output voltage of an LM317.

Pros Cons
Can calculate both resistance and voltage values
Shows calculation formula
Explain the working of this calculator

## leaningaboutelectronics.com

leaningaboutelectronics.com is another free online LM317 calculator website. This website offers two separate LM317 calculators namely LM317 Voltage and LM317 Resistor. The LM317 voltage calculator uses Resistor R1 and R2 values. On the other hand, the LM317 Resistor calculator uses Resistor R1 and Voltage Vout values to perform the calculation. This website also shows the formula that it uses to perform the calculation. Now, follow the below steps.

### How to calculate LM317 resistance and voltage value using learningaboutelectronics.com:

• Visit this website using the given link.
• After that, select any one of the LM317 calculators and enter the required values.
• Finally, tap on the Submit button to view the output value.

### Additional Features:

• This website also offers related tools like the LM337 Resistor & Voltage calculator, LM317 voltage regulator, voltage divider calculator, and more.

### Final Thoughts:

It is another simple LM317 calculator website that anyone can use to calculate the resistance and output voltage values of an LM317 circuit.

Pros Cons
Can calculate both resistance and voltage values Lacks information related to the LM317 circuit
Provides calculation formula

## reuk.co.uk

reuk.co.uk is another free online LM317 calculator website. Through this website, users can calculate the voltage of both LM317 and LM338 circuits. To do that, users just need to enter the Resistance R1 and R2 values in the ohms unit. It also shows the formula that it uses to perform the calculation. To describe the LM317 circuit, it provides a circuit diagram with proper markings. Now, follow the below steps.

### How to calculate LM317 voltage online using reuk.co.uk:

• Visit this website and find the LM317 Voltage Calculator.
• Now, enter the Resistance R1 and R2 values.
• Next, click on the Calculate button to view the output voltage.

### Additional Features:

• This website offers multiple blogs and tools related to Wave, Tidal, Thermoelectric, Biomass, Carbon, and Transport topics.

### Final Thoughts:

It is another good online LM317 voltage calculator website that anyone can use with ease.

Pros Cons
Provides calculation formula

## circuiteasy.com

circuiteasy.com is another free online LM317 calculator website. This website offers Voltage and Resistance calculation tools for LM317, LM117, LM338, and LM350 ICs. All three LM317 (Vout, R1, and R2) parameters can be calculated by this website by providing the two known parameters. A generic diagram of LC ICs is also provided. However, it lacks information related to LM317 IC. Now, follow the below steps.

### How to calculate all parameters of LM317 IC online using circuiteasy.com:

• Open the interface of this website and access the Calculator for Regulator IC LM317 circuit.
• After that, enter the values of two known parameters to find the third one.
• Next, click on the Calculate button to start the calculation process.

### Additional Features:

• This website offers experiments related to multiple electronics projects & circuits.

### Final Thoughts:

It is another capable LM317 calculator website that can calculate all three LM317 IC parameters in no time.

Pros Cons
Can perform calculations for various ICs Lacks information related to LM317 IC
Can calculate all three primary parameters
Shows LM317 IC diagram

## uk.farnell.com

uk.farnell.com is another free online LM317 calculator website. It is another good website that helps users calculate the Resistance (R1 and R2) and output values of an LM317 IC. It also shows the Vout calculation formula and an LM317 IC diagram. However, it lacks data and information describing LM317 and its calculation. Now, follow the below steps.

### How to calculate all parameters of LM317 IC online using uk.farnell.com:

• Launch this website using the given link.
• After that, enter Resistor (R1 and R2) values to calculate output voltage.
• Next, enter one Resistor value and one output voltage value to calculate the second resistance value.
• Finally, click on the Calculate button to view the answer.

### Additional Features:

• This website has multiple online tools like 555 Timer Calculator, Current Divider Calculator, Battery Life Calculator, Mass and Weight Calculator, etc.

### Final Thoughts:

It is another good online LM317 calculator website that anyone can use without much hassle.

Pros Cons
Can calculate output voltage and resistance values Lacks information related to LM317 IC
Shows calculation formula
Shows LM317 IC diagram

## engineering.icalculator.com

engineering.icalculator.com is another free online LM317 calculator website. This website helps users calculate the Resistor and Voltage values of LM317 ICs. To do that, users need to enter two known values to find the third one. It also shows the formulas used to calculate LM317 parameters. Now, follow the below steps.

### How to calculate LM317 parameters online using engineering.icalculator.com:

• Go to this website and access the LM317 voltage and resistor calculator.
• After that, select the parameter (R1, R2, or V) that you want to calculate.
• Now, enter the remaining two known values.
• Finally, view the calculated value in the Resists section.

### Additional Features:

• This website has multiple engineering calculators like Mohrs Circle, IC 555 Astable Timer, DC Power, Water Pumping Cost, and more.

### Final Thoughts:

It is another good online LM317 calculator that anyone can use to calculate LM317 parameters.

Pros Cons
Can calculate output voltage and resistance values
Shows calculation formula

## circuitspedia.com

circuitspedia.com is the last free online LM317 calculator website. Through this website, users can calculate Resistance R1, Resistance, R2, and Output Voltage parameters. Users can also change the SI units of Resistance parameters. It also shows LM317 calculation formula and circuit diagram. However, it lacks details explaining LM317 IC. Now, follow the below steps.

### How to calculate LM317 IC parameters online using circuitspedia.com:

• Visit this website using the provided link.
• After that, enter the values of two known parameters to find the third one.
• Next, specify the SI unit of Resistance.
• Finally, click on the calculate button to view the result.

### Additional Features:

• This website has tools associated with Logic gates, 555 Timer, Resistor Color Code, LM317 Voltage regulator IC, etc.

### Final Thoughts:

It is another good online LM317 calculator website that offers all the tools to calculate all three LM317 IC parameters.

Pros Cons
Can calculate output voltage and resistance values
Shows calculation formula
Shows LM317 diagram

## Frequently Asked Questions

The LM317 is a voltage regulator integrated circuit (IC) that is commonly used in electronic circuits to provide a stable and adjustable output voltage. It is particularly popular for designing power supplies where a constant and precise voltage is required.

No, the LM317 is not designed to increase voltage. It is a linear voltage regulator that is used to regulate and, if needed, reduce an input voltage to a stable and adjustable lower output voltage. The LM317 is specifically designed for step-down voltage regulation.

The LM317 has a maximum recommended input voltage. Exceeding this voltage may damage the device. For the LM317, the typical maximum input voltage is around 40 volts, but it's advisable to refer to the specific datasheet for the exact value. The LM317 can provide a regulated output voltage ranging from approximately 1.25 volts to 37 volts. The actual output voltage is determined by the values of external resistors connected to the adjustment (ADJ) pin. The LM317 has a maximum output current specification. Exceeding this current may lead to overheating and damage. The maximum output current depends on the specific variant of the LM317 and can range from 1.5A to 2.2A.

No, the LM317 is not a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor). It is an integrated circuit (IC) voltage regulator. The LM317 is a monolithic integrated circuit with three terminals, designed to provide a stable and adjustable output voltage. It is often used in electronic circuits to regulate and control the voltage supplied to other components.

The minimum dropout voltage for the LM317 is typically around 3 volts. This means that for proper regulation, the input voltage must be at least 3 volts higher than the desired output voltage.

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