Truth Value Calculator

The Truth Value Calculator is a handy tool designed to help users quickly evaluate the truth value of logical statements. Whether you’re studying logic, programming, or just curious about the outcomes of different combinations of logical conditions, this calculator simplifies the process.


The Truth Value Calculator uses the eval() function in JavaScript to evaluate logical statements. It supports standard logical operators such as AND, OR, and NOT. Enter your logical statement, click the “Calculate” button, and receive the truth value result.

How to use:

  1. Enter your logical statement in the provided text input.
  2. Click the “Calculate” button to evaluate the truth value.
  3. View the result displayed below the input form.


Suppose you enter the logical statement: (p AND q) OR NOT r. The calculator will evaluate the truth value based on the current values of p, q, and r, providing a clear result.


  1. Q: Can I use parentheses in my logical statements? A: Yes, parentheses are supported and can be used to group conditions.
  2. Q: What happens if I enter an invalid logical statement? A: The calculator will display “Invalid input or error.” Check your statement for errors and try again.
  3. Q: Are there any limitations on the length of the logical statement? A: While there is no strict limit, excessively long statements may lead to performance issues.
  4. Q: Can I use variables other than p, q, and r? A: No, the calculator currently supports only p, q, and r as variables.
  5. Q: Is the calculator case-sensitive? A: No, the calculator is case-insensitive when evaluating logical statements.


The Truth Value Calculator provides a simple and efficient way to evaluate the truth value of logical statements. Whether you’re a student, programmer, or logic enthusiast, this tool helps streamline the process of checking the outcomes of different logical conditions. Enter your statement, click “Calculate,” and gain insights into the truth values of your logical expressions.

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