Scientific Calculator

This is a full scientific calculator: trigonometry, logarithms, exponents, roots, factorial, and the constants pi and e. It parses your expression the way a graphing calculator does, respecting order of operations, so you can type a whole formula on one line and get the right answer. Type with your keyboard or tap the buttons, see the result update live, and reuse any past result from the history panel.

The calculator uses a proper expression parser (the shunting-yard algorithm), not a left-to-right button sequence. That means it follows the standard order of operations:

• Parentheses / Brackets first
• Exponents / Orders (powers and roots)
• Multiplication and Division (left to right)
• Addition and Subtraction (left to right)

So 2 + 3 × 4 correctly gives 14, not 20. And (2 + 3) × 4 gives 20. Use parentheses whenever you want to override the default order.

Trigonometry: sin, cos, tan

Set DEG or RAD before using these. sin(30) is 0.5 in degrees but −0.988 in radians - the same input, very different answers. The inverse functions (asin, acos, atan) are available by typing them directly.

Logarithms: log and ln

log is base 10 (log(1000) = 3). ln is the natural log, base e (ln(e) = 1). To compute a log in another base, use the change-of-base formula: log base b of x = ln(x) / ln(b).

Powers and roots

x² squares the value, xʸ (the ^ symbol) raises to any power, and √ takes the square root. For a cube root use x^(1/3); for any nth root use x^(1/n).

Factorial

n! multiplies all whole numbers from 1 to n. 5! = 120. Used heavily in probability and combinatorics. Values above 170! overflow to infinity (a limitation of standard floating-point numbers).

Constants: pi and e

pi ≈ 3.14159 (ratio of a circle's circumference to its diameter). e ≈ 2.71828 (the base of natural logarithms). Type them as part of any expression.

• Numbers and + − * / ^ ( ) . - type directly
• Enter or = - calculate
• Backspace - delete the last character
• Escape - clear everything
• Click a history entry - reuse that result
• Ans button - insert the most recent answer

How do I calculate a percentage?

The % button inserts × 0.01, so 50 × 20% evaluates as 50 × 0.20 = 10 (20% of 50). For percentage increase, compute 50 × 1.2 to add 20%.

How do I compute a cube root?

Use a fractional exponent: 27^(1/3) = 3. For any nth root, raise to the power 1/n.

Why does sin(90) give 1 but sin(pi/2) needs radians?

In degrees mode, 90 degrees is a quarter turn, and sin is 1. In radians mode, the equivalent is π/2 ≈ 1.5708. Both describe the same angle; the number you type depends on the mode.

What does E mean in a result?

Scientific notation for very large or very small numbers. 1.5E12 means 1.5 × 10¹² (1,500,000,000,000). The calculator switches to this format automatically when numbers get too long to display normally.

Can it handle long expressions?

Yes. Type an entire formula with nested parentheses and multiple functions on one line, like sqrt(sin(45)^2 + cos(45)^2), and it evaluates the whole thing at once with correct precedence.

What is 1.5e12 in numbers?

1.5e12 in numbers is 1,500,000,000,000, which is 1.5 trillion. The exponent 12 tells you to move the decimal point of 1.5 twelve places to the right, filling the gap with zeros.

What does 1.5e12 mean?

It means 1.5 × 10¹², or 1.5 times ten to the power 12. The e is shorthand for "times ten to the power of", so 1.5e12 equals 1,500,000,000,000 (1.5 trillion).

How do I read scientific notation?

Read the number before the "e" as the coefficient and the number after it as the power of 10. So 6.022e23 reads as "6.022 times ten to the power of 23". A positive exponent means a large number, and a negative exponent means a small fraction below 1.

What is e notation on a calculator?

E notation (also called scientific notation or exponential notation) is how a calculator shows numbers that are too big or too small to fit on screen. The e replaces "times ten to the power of", so 1e-3 means 1 × 10 to the power of -3, which equals 0.001. It is the same format as the capital E you see in a result.

1.5e12 means 1.5 × 10¹², which is 1.5 multiplied by ten to the power 12. That works out to 1,500,000,000,000, or 1.5 trillion. The letter "e" here stands for "times ten to the power of", so 1.5e12 is simply a compact way of writing 1.5 × 10¹² without superscripts. You will see this format on almost every calculator, spreadsheet, and programming language.

The exponent tells you how far to move the decimal point. A positive exponent like 12 shifts the decimal point 12 places to the right, adding zeros and making the number larger. A negative exponent shifts the decimal point to the left instead, so 2.5e-6 means 2.5 × 10 to the power of -6, which equals 0.0000025, a very small number.

Type any of these into the calculator, or use the table as a quick reference for turning E notation into a full decimal number.

A positive exponent (such as e12) moves the decimal point right and makes the number bigger. A negative exponent (such as e-6) moves it left and makes the number smaller.

From scientific notation to a plain number

Start with the coefficient and move the decimal point by the number of places shown in the exponent. Move right for a positive exponent, left for a negative one, and pad with zeros as needed.

• 1.5e12 becomes 1,500,000,000,000 (move the decimal 12 places right)
• 6.022e23 becomes 602,200,000,000,000,000,000,000 (move it 23 places right)
• 2.5e-6 becomes 0.0000025 (move the decimal 6 places left)

From a plain number back to scientific notation

Move the decimal point until only one non-zero digit stays to its left, then count how many places you moved it. That count is the exponent: positive if you moved the point left, negative if you moved it right.

• 1,500,000,000,000 becomes 1.5e12 (move the decimal 12 places left)
• 0.001 becomes 1e-3 (move the decimal 3 places right)