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Op-Amp Voltage and Gain Calculator

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
R1KOhms
R2KOhms
R3KOhms
R4KOhms
V1V
V2V
VpV
VnV
Outputs

Vout

Output is clipped.

V
Gain InvertingVout/V1
Gain non-invertingVout/V2
Introduction

Operational amplifiers are used in many circuits - one of the main applications is in amplifiers. Here the operational amplifier gain is of key importance. Although there are both inverting and non-inverting amplifiers which have their own calculations, there is a generic equation for these circuits. The generic formula can be used to develop the equations for the inverting and non-inverting configurations. The gain of these operational amplifier circuits is governed by the level of negative feedback. Applying negative feedback provides a defined level of gain, wider bandwidth, lower distortion as well as a number of other advantages. However it is often the operational amplifier gain that is of major importance. When looking at the inverting amplifier circuit, the equation for the circuit can be calculated from the simple formula Av = R2/R1. For the non-inverting amplifier the gain is slightly different and can be calculated from the formula Av = 1+ (R2/R1). It is also possible to use the non-inverting amplifier as a buffer amplifier with a unity voltage gain by looping the output back to the inverting input, i.e. R1 = infinity and R2 = zero. In this way the voltage gain can be calculated to be 1. So in summary both inverting and non-inverting amplifier gain is easy to calculate using the simple formulas.

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).
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