Scientific Calculator

How to use the scientific calculator

1. Build a complete expression — for example sin(45) + √2 × 3 — by typing or tapping the keypad.
2. Set the angle mode with Deg or Rad before using any trig function.
3. Press = (or Enter) to evaluate. Use Ans to feed the previous result into a new calculation.

Expression-based, not step-by-step

Unlike a basic calculator that computes each key as you press it, this one reads your whole expression before evaluating. It parses what you type and applies the correct order of operations, so you can write a formula the way it appears on paper — nested parentheses and all — and check it on the display before committing. Nothing is sent to a server; every calculation runs on your device.

Supported functions and constants

• Trigonometry: sin, cos, tan and their inverses (sin⁻¹, cos⁻¹, tan⁻¹). Respects the Deg/Rad toggle.
• Logarithms: ln is the natural log (base e) and log is base 10.
• Powers & roots: x², x³, xʸ, eˣ, 10ˣ, √ (square root) and ∛ (cube root). You can also type the caret ^ directly, so 3^4 = 81.
• Factorial: n! multiplies all whole numbers up to n (5! = 120).
• Constants: π ≈ 3.14159 and e ≈ 2.71828.
• mod (remainder after division), EXP (scientific-notation exponent, inserts ×10^), Ans (previous answer) and 1/x (reciprocal).

Order of operations (PEMDAS)

The calculator follows the universal order of operations: Parentheses, Exponents, Multiplication and Division (left to right), then Addition and Subtraction (left to right). For instance, 2 + 3 × 4 equals 14, not 20, because multiplication is applied before addition. When in doubt, add parentheses — they force the order you intend.

Degrees vs. radians

Switch between Deg and Rad at the top of the keypad. Use degrees for everyday geometry and navigation; use radians for calculus and most physics. The same keys give different answers in each mode: sin(90) is 1 in degrees, while sin(π / 2) is 1 in radians. Set the mode before you evaluate, not after.

A worked example, key by key

To find the hypotenuse of a 3-4 right triangle, compute √(3² + 4²). Press √ (which opens sqrt(), then 3 x² + 4 x² ) and =. The calculator evaluates 9 + 16 = 25 inside the root and returns 5. A few more to try:

• Compound growth: 1000 × (1 + 0.05)^10 ≈ 1628.89 — a balance after 10 years at 5%.
• Combinations: 10! / (3! × 7!) = 120, the number of ways to choose 3 from 10.
• Scientific notation: 6.022 EXP 23 enters 6.022 ×10²³.

Accuracy and limits

Results use standard double-precision arithmetic, so a value that should be exact can occasionally show a tiny rounding tail — round the display to the precision your problem needs. Factorials are exact up to 170!; beyond that the true value exceeds what the format can hold and the calculator returns infinity. For a full list of descriptive statistics on a data set, use the statistics calculator; for percentage math, the percentage calculator.