Created By : Naaz Fatima

Reviewed By : Rajashekhar Valipishetty

Last Updated : May 18, 2023

By using this wheatstone bridge calculator it will be quite easy and convenient to calculate the wheatstone bridge. All you have to do is give the parameters of the input fields and then calculate to get the accurate result.

### What do you Mean by Wheatstone Bridge?

Wheatstone bridge estimates the electrical resistance which is unknown. These circuits are mainly used in electronic sensors that detect the changes in resistance very accurately. Midpoint of two voltage dividers are estimated by the voltage of the bridge. wheatstone bridge consists of four resistors that are interconnected, i.e. R1, R2, R3, R4.

The voltage of the bridge will be equal to 0 when the voltage between R1 and R2 will be equal to the ratio of R3 and R4. As the bridge is balanced, we have the formula of R4 = (R3 * R2)/ R1.

Wheatstone bridges are mainly used in strain guages. We use the formula for the wheatstone bridge is given below.

For, unbalanced wheatstone bridge resistance, VG = V * [{R1 / (R1 + R2)} + {R3 / (R3 + R4)}]

Here,

R1, R2, R3, R4 are resistors.

v = voltage.

For, a balanced wheatstone bridge, VG = 0.

R4 = (R2 / R1) * R3.

### How to find Wheatstone Bridge?

The steps which we are giving below are the steps you need to follow to calculate the wheatstone bridge. Follow the below steps carefully.

• First, we need to check what are the values that are given in the problem.
• And then, see whether it is in a balanced state or unbalanced state.
• After that, apply the formula of balanced or unbalanced wheatstone bridge formula.
• If you want to use balanced wheatstone bridge resistance, R4 = (R2 / R1) * R3.
• If you want to use unbalanced wheatstone bridge, VG = V * [{R1 / (R1 + R2)} + {R3 / (R3 + R4)}]
• Then, Finally after simplifying it, you will get the unknown resistance.

### Wheatstone Bridge Calculation Example

Example:

Question:How to find the unknown resistance of a wheatstone bridge? If R1 = 2 Ω, R2 = 5 Ω, R3 = 7 Ω and V = 6.0 V.

Solution:

Given that, R1 = 2 Ω, R2 = 5 Ω, R3 = 7 Ω and V = 6.0 V.

As this is in a balanced state, wheatstone bridge resistance formula,

R4 = (R2 / R1) * R3.

R4 = (5 / 2) * 7

R4 = 2.5 * 7 = 17.5 Ω

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### FAQs on Wheatstone Bridge Calculator

1. What is unbalanced wheatstone bridge Formula?

Formula of unbalanced wheatstone bridge is, VG = V * [{R1 / (R1 + R2)} + {R3 / (R3 + R4)}]

2. What is meant by the wheat stone bridge experiment?

Wheatstone bridge is a circuit that measures a small level of resistance. In simple words, measuring the resistance when the capacity of resistance is unknown.

3. What is a balanced wheatstone bridge?

A balanced wheatstone bridge is a bridge when the voltage between the resistance R1 and R2 equals to the voltage of resistance between R3 and R4. When voltage is balanced, the current will be 0.

4. How to calculate R4 on Wheatstone bridge?

For calculating R4, select the resistance of balanced bridge R4 = (R2 / R1) * R3.