🧮 Scientific Calculator

An easy-to-use scientific calculator for students.

 
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What Does Each Key Do?

sin, cos, tan — Trigonometric functions. Used for angles (e.g. finding a triangle's side length).
DEG / RAD — Switches whether angles are measured in Degrees (0–360°) or Radians (0–2π). Most school problems use Degrees.
log — Logarithm base 10. Answers "10 to what power gives this number?"
ln — Natural logarithm (base e ≈ 2.718). Common in higher-level math and science.
√ (sqrt) — Square root of the current number.
x² — Squares the current number (multiplies it by itself).
π (pi) — Inserts the mathematical constant π ≈ 3.14159, used in circle/angle calculations.
e — Inserts Euler's number ≈ 2.71828, the base of natural logarithms.
n! — Factorial. Multiplies the number by every whole number below it down to 1 (e.g. 5! = 5×4×3×2×1 = 120).
MC / MR / M+ — Memory Clear, Memory Recall, Memory Add. Store a number temporarily to reuse in a later calculation.
( ) — Parentheses, for controlling the order of operations (like in written math).
% — Converts the current number to a percentage (divides by 100).

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📘 How to Use This Tool

An easy-to-use scientific calculator built for students — every function key is explained in plain language so you know exactly what it does and when to use it.

  1. Basic operations (+, −, ×, ÷): Type numbers and tap these to add, subtract, multiply, or divide, then press = to see the result. Example: 12 + 8 = 20.
  2. Parentheses ( and ): Use these to control the order of calculation, just like in math class. Example: (2 + 3) × 4 = 20, but without brackets, 2 + 3 × 4 = 14, because multiplication happens before addition.
  3. Power / exponent (x^y or x²): Use this to multiply a number by itself a number of times. Example: 2^3 means 2 × 2 × 2 = 8. The x² button squares a number instantly — 5² = 25.
  4. Square root (√): This finds the number that, multiplied by itself, gives your input. Example: √25 = 5, because 5 × 5 = 25.
  5. sin, cos, tan (trigonometric functions): These are used with angles, often in geometry or physics problems involving triangles. Example: sin(30°) = 0.5. Check whether the calculator is set to Degree (°) or Radian mode before using these — most school problems use Degree mode.
  6. log and ln (logarithms): log finds the power of 10 needed to get a number — log(100) = 2, because 10² = 100. ln is the natural logarithm, using a special number called e instead of 10 — you will meet this more in higher-level math.
  7. n! (factorial): This multiplies a number by every whole number below it down to 1. Example: 4! = 4 × 3 × 2 × 1 = 24. Factorials are common in probability and combinations problems.
  8. π (pi) and e (Euler's number): These are fixed mathematical constants built into the calculator — press the button instead of typing 3.14159... by hand. π is used in circle and geometry problems; e appears in growth and logarithm problems.
  9. C (Clear) and ⌫ (Backspace): C clears the entire calculation to start fresh. ⌫ removes just the last digit or symbol you typed, so you can fix a small typing mistake without starting over.
  10. Putting it together — example: to calculate (3 + 5)² − √16, first press ( 3 + 5 ), then the x² button, then − √ 16, then press = to get 64 − 4 = 60.

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