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.