Scientific Calculator
DEG
0
FAQs
- How do I switch between degrees and radians?
- Press the DEG/RAD key at the top-left of the keypad. The current mode is shown on the display. In DEG mode, sin(90) = 1; in RAD mode, sin(π/2) = 1.
- How do I calculate powers and roots?
- Use x² for squares, ^ for any power (2^10 = 1024), √ for square roots, and ⁿ√ for other roots — it types root( and takes two inputs: root(3, 27) is the cube root of 27, which equals 3.
- What is the ANS key?
- ANS inserts the result of your previous calculation, so you can chain steps: after 6 × 7 = 42, pressing ANS + 1 = gives 43.
- How do I use the inverse trig functions?
- sin⁻¹, cos⁻¹ and tan⁻¹ compute the angle whose sine, cosine or tangent you enter. The answer comes back in the current angle mode — sin⁻¹(1) is 90 in DEG mode and π/2 ≈ 1.5708 in RAD mode.
- What is the difference between log and ln?
- log is the base-10 logarithm (log(1000) = 3) and ln is the natural logarithm, base e ≈ 2.71828 (ln(e) = 1). Both are defined for positive numbers only.
- Can I type calculations with my keyboard?
- Yes — digits, the + - * / ^ % ( ) keys, Enter for equals, Escape to clear, and Backspace to delete all work exactly like the on-screen keys.
- How large a factorial can it compute?
- Up to 170! — beyond that the result exceeds what standard floating-point numbers can represent, and the calculator reports an error instead of showing an inaccurate value.
What is this scientific calculator?
A free online scientific calculator covering the functions of a classic Casio-style pocket calculator: trigonometry with a DEG/RAD switch, base-10 and natural logarithms, powers and roots, factorial, the constants π and e, parentheses, percentages, a memory register and an ANS key that recalls your previous result. Every calculation is kept in a history tape you can click to reuse.
Functions and how to enter them
- Trigonometry — sin, cos, tan and their inverses. Check the DEG/RAD indicator first: sin(90) = 1 in degrees, sin(π/2) = 1 in radians.
- Powers and roots — x² squares, ^ raises to any power (2^10 = 1024), √ takes a square root, and ⁿ√ enters root(n, x): root(3, 27) = 3.
- Logarithms — log is base 10, ln is base e; 10ˣ and eˣ are their inverses.
- Factorial — the x! key: 5! = 120, up to 170!.
- ANS — inserts the previous result: after 6 × 7 = 42, ANS + 1 = 43.
Keyboard shortcuts
| Key | Action |
|---|---|
| 0–9 . ( ) | digits, decimal point, parentheses |
| + - * / ^ % ! | operators |
| Enter | equals |
| Escape | clear entry |
| Backspace | delete last input |
Limitations
- Double-precision arithmetic — about 15 significant digits; results outside ±10¹² display in scientific notation.
- Undefined operations (division by zero, log of a non-positive number, tan 90° in DEG) show a clear error message.
- Hyperbolic functions, fractions display and base-n modes are not included in this version.