A scientific calculator extends the basic four-function calculator with trigonometry, logarithms, exponents, roots and constants like π and e. If you're studying physics, engineering, chemistry or finance — or you just need to compute the sine of an angle without opening a spreadsheet — this is the right tool.
Supported functions
- Trigonometry: sin, cos, tan (and their inverses via asin/acos/atan) in degrees or radians.
- Logarithms: natural log (ln) and base-10 (log).
- Exponents and roots:
^for powers,√for square root,exp()for eˣ. - Constants: π ≈ 3.14159, e ≈ 2.71828.
- Factorial:
n!for non-negative integers up to 170. - Memory: M+, M−, MR, MC — store and recall a running total.
How operator precedence works
The calculator follows PEMDAS: parentheses first, then exponents, then multiplication and division (left-to-right), then addition and subtraction. Wrap expressions in brackets when in doubt: (2 + 3) × 4 = 20, but 2 + 3 × 4 = 14.
Worked example
To compute the height of a triangle whose hypotenuse is 10 and angle 30° from horizontal: 10 × sin(30) = 5 in DEG mode. Switching to RAD, sin(30) instead means the sine of 30 radians, which is −0.988.
Tips and common mistakes
- Always check the DEG/RAD indicator — it's the number-one cause of "why is my answer wrong?"
lnis natural log (base e),logis base-10. Don't swap them.- Factorials grow explosively — 20! is already 2.4 quintillion.
Frequently asked questions
Is this calculator free to use?+
Yes, completely free. No sign-up, no ads inside the calculator, and it works offline in your browser.
Does it support parentheses and operator precedence?+
Yes. It respects standard PEMDAS order — parentheses, exponents, multiplication and division, then addition and subtraction.
Are trigonometric functions in radians or degrees?+
Toggle DEG / RAD at the top of the pad. The default is degrees because it matches most classroom problems.
Can I chain operations like on a real scientific calculator?+
Yes. Type a full expression and press = to evaluate, or use the Ans key to reuse the last result.
How accurate is it?+
Calculations use IEEE-754 double precision — about 15 significant digits — which is more than enough for engineering, physics and finance work.