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Calculator That You Can Put Formulas

Reviewed by Calculator Editorial Team

This formula-based calculator lets you input and solve mathematical expressions with custom formulas. Whether you need to calculate complex equations, solve for variables, or evaluate mathematical expressions, this tool provides a flexible way to work with formulas.

How This Calculator Works

The calculator evaluates mathematical expressions you enter. It supports standard arithmetic operations, parentheses, and common mathematical functions. You can input formulas directly, and the calculator will compute the result.

Formula Used

The calculator evaluates the expression you enter using standard mathematical rules. It handles:

  • Basic arithmetic: +, -, *, /
  • Exponents: ^ or **
  • Parentheses for grouping: ( )
  • Common functions: sin(), cos(), tan(), log(), ln(), sqrt()

For example, entering "3 + 4 * 2" will calculate 3 + (4 * 2) = 11, while "(3 + 4) * 2" will calculate (3 + 4) * 2 = 14.

Important Notes

The calculator follows standard mathematical order of operations (PEMDAS/BODMAS rules).

For division by zero, the calculator will display an error message.

Formula Examples

Here are some examples of formulas you can enter:

Formula Result Explanation
2 + 3 * 4 14 Multiplication before addition: 3 * 4 = 12, then 2 + 12 = 14
(2 + 3) * 4 20 Parentheses first: 2 + 3 = 5, then 5 * 4 = 20
sin(45) + cos(30) ≈ 1.366 sin(45°) ≈ 0.707, cos(30°) ≈ 0.866, sum ≈ 1.573
log(100) 2 log base 10 of 100 is 2

These examples demonstrate how the calculator handles different types of mathematical expressions.

How to Use This Calculator

  1. Enter your mathematical expression in the formula field. For example, "2 + 3 * 4" or "sin(45) + cos(30)".
  2. Click the "Calculate" button to evaluate the expression.
  3. View the result in the result panel. The calculator will show the computed value.
  4. If you need to start over, click the "Reset" button to clear the formula and result.

Tips for Using the Calculator

  • Use parentheses to control the order of operations.
  • For trigonometric functions, use degrees by default.
  • For logarithms, use base 10 unless you specify otherwise.

Frequently Asked Questions

What types of formulas can I enter?

You can enter any valid mathematical expression that includes numbers, basic arithmetic operations, parentheses, and common mathematical functions like sin(), cos(), tan(), log(), ln(), and sqrt().

How does the calculator handle order of operations?

The calculator follows standard mathematical order of operations (PEMDAS/BODMAS rules): Parentheses first, then Exponents, then Multiplication and Division (from left to right), and finally Addition and Subtraction (from left to right).

Can I use variables in my formulas?

This calculator evaluates expressions directly rather than solving for variables. For solving equations with variables, you would need a different type of calculator or mathematical software.

What if I enter an invalid formula?

The calculator will display an error message if the formula is invalid or contains syntax errors. Check your formula for missing parentheses, incorrect operators, or unsupported functions.