LM317 Resistor/Voltage Calculator LM317 Resistor/Voltage Calculator LM317 Resistor/Voltage Calculator Calculate Output Voltage Resistor R1 (Ω) Resistor R2 (Ω) Calculate Voltage Calculate Resistor Values for Desired Output Voltage Desired Output Voltage (V) Calculate Resistor Values The LM317 is a versatile voltage regulator that can be used to provide a stable output voltage. This calculator helps you determine the output voltage based on the resistor values or find the resistor values needed for a specific output voltage. Example Calculations Calculate Output Voltage: If R1 = 1kΩ and R2 = 5kΩ: Vout = 1.25 × (1 + R2 / R1) = 1.25 × (1 + 5000 / 1000) = 1.25 × 6 = 7.5 V Calculate Resistor Values: To achieve a 10V output voltage: R2 = [(Vout / 1.25) - 1] × R1 = [(10 / 1.25) - 1] × 1000 = (8 - 1) × 1000 = 7000 Ω = 7kΩ Subscribe to Updates Get the latest creative news from SmartMag about art & design.