Op Amp Voltage and Gain Calculator is a great opamp calculation tool, which is used to calculate the output Voltage, Inverting Gain and Non-Inverting Gain for an operational Amplifier. Before calculation, you should input the values of V1, V2, Vp, Vn and the resistance of R1, R2, R3, R4. And this operational amplifier calculator is easy-to-use and suitable for professional and newbie electricians.
Input Parameters
R1
KOhms
R2
KOhms
R3
KOhms
R4
KOhms
V1
V
V2
V
Vp
V
Vn
V
Outputs
Vout
Output is clipped.
V
Gain Inverting
Vout/V1
Gain non-inverting
Vout/V2
Introduction
Op Amp Gain | Details Calculations Formulas
OP AMP Calculator Overview
OP Amplifier calculator is an opamp calculation tool designed by Utmel Electronic, which is one of the best Electronic Components distributors. And with the help of this OP AMP Calculation tool, you can get the amplifier output power and Gain for an operational Amplifier. So OP AMP Calculator is also named OP AMP Gain Calculator (operational amplifier gain calculation tool) or OP AMP Voltage Calculator. And this OP AMP Calculator can work with not only inverting amplifier gain, but also non inverting amplifier gain. If you would like to calculate the values for differential amplifier, please refer to differential amplifier calculator.
OP Amp Gain Formula
Maybe you have the question about how to calculate gain. The op amp equations are as the following: Vout = AVinput
And the above operational amplifier formulas are suitable for non inverting and inverting operational amplifier. Therefore, the op amp gain equation for inverting op-amp is A = - R2/R1.
And the gain of the non inverting op-amp can be determined using the Operational Amplifier Formula for amp: A = 1 + R2/R1.
Frequently Asked Questions
What parameters do I need to input for the calculation?
You need to input the resistor values (R1-R4 in kΩ), input voltages (V1 and V2 in volts), and the op-amp's power supply voltages (Vp and Vn in volts). These parameters allow the tool to calculate the output voltage and gains accurately.
Why does the output voltage sometimes show "Output is clipped"?
This occurs when the calculated Vout exceeds the op-amp's supply voltages (Vp or Vn). Real op-amps cannot output voltages beyond their supply rails, so the signal is clipped at ±Vp/Vn. Ensure your input signals and resistor ratios stay within the supply limits.
How are the inverting and non-inverting gains calculated?
Inverting Gain: Gain = -R2/R1 (negative due to signal inversion). Non-Inverting Gain: Gain = 1 + R2/R1. The tool uses these formulas to compute gains based on your resistor values.
Can I use this calculator for differential amplifier configurations?
No, this tool is designed for basic inverting/non-inverting op-amp circuits. For differential amplifiers (e.g., using R3 and R4), refer to a dedicated differential amplifier calculator, as the formula involves additional resistor ratios.
Why is the non-inverting gain formula different from the inverting gain?
In a non-inverting configuration, the input signal is applied directly to the op-amp's non-inverting terminal, resulting in a positive gain (1 + R2/R1). For inverting setups, the signal is fed through resistors to the inverting terminal, causing phase inversion and a negative gain (-R2/R1).
