How to Use the Scientific Calculator

This calculator handles both basic arithmetic and complex scientific functions. Here is a quick guide to get you started. If you need to track your assignment scores, you can use our grade calculator.

• 1
  Basic Math: Use the number pad and the primary operators (+, −, ×, ÷) on the right side of the keypad. Press = to compute.
• 2
  Trigonometry (Deg/Rad): Press the Deg/Rad button to toggle between Degrees and Radians. Once your preferred mode is shown on the display, use sin, cos, and tan (or their inverses sin⁻¹).
• 3
  Powers and Roots: Use x² or x³ for quick squaring/cubing. For custom exponents, type your base number, press x^y, and type the exponent. Use √x for square roots.
• 4
  Constants & Memory: Insert mathematical constants like π (Pi) or e (Euler's number). Use M+, M-, and MR to store, subtract, and recall values from memory.
• 5
  Use Previous Answer: Press the Ans button to insert the result of your last calculation into your current equation. Pressing RND inserts a random digit (learn how this works in our guide on true random vs. pseudo-random number generators).

Frequently Asked Questions (FAQ)

What is the difference between DEG and RAD?

DEG (Degrees) and RAD (Radians) are two units for measuring angles. Degrees divide a circle into 360 units, which is common in everyday geometry and navigation. Radians measure angles based on the radius of a circle (a full circle is 2π radians) and are the standard unit in higher mathematics and physics. Toggle between them depending on what your math problem requires.

How do I calculate exponents like 2 to the 5th power?

To calculate an exponent like 2⁵, type 2, press the x^y button, type 5, and press =. For common exponents, you can also use the dedicated x² or x³ buttons.

What does the "Ans" button do?

The Ans button inserts the result of your most recent calculation into your current equation. For example, if you just calculated 5 + 5 and got 10, pressing Ans followed by × 2 will calculate 10 × 2.

How do the memory functions (M+, M-, MR) work?

M+ adds the number currently on your screen to the memory bank. M- subtracts it. MR (Memory Recall) displays the total value stored in the memory. This is useful for storing a constant number and using it in multiple different calculations. To calculate your semester average, you can use our GPA calculator.

Why does the calculator show "Error"?

The calculator will display "Error" if you attempt an invalid mathematical operation. Common causes include dividing by zero, taking the square root of a negative number, or entering an unbalanced number of parentheses. Press AC (All Clear) to reset the display and start over.

Is this scientific calculator free to use?

Yes, this tool is 100% free to use. It runs entirely in your web browser, meaning you don't need to download an app or pay for a subscription. Your calculations are processed locally on your device and are never sent to a server. If you need to generate secure, random characters for accounts, try our random password generator.