What is Scientific Calculator?

A scientific calculator with trigonometric functions, logarithms, exponents, factorials, and constants like pi and e. Supports parentheses for complex expressions, degree, radian, and gradian modes, a memory register (M+, M-, MR, MC), full keyboard input, and calculation history so you can review previous results.

Expressions are parsed by mathjs, so you can chain operators the way you would on a TI-style calculator: parentheses, implicit multiplication, percent, factorial with !, and exponents with ^. Trig functions accept degrees, radians, or gradians depending on the DEG/RAD/GRAD cycle button. Digits, operators, parentheses, Enter (evaluate), Backspace, and Escape (AC) all work from the physical keyboard. The memory register lets you store, add to, subtract from, and recall a running total. The history panel keeps the last 50 results so you can recall ANS or paste an earlier answer into the next expression.

How to use

1. Enter your expression using the on-screen buttons or type directly — supports sin, cos, tan, log, ln, sqrt, and power functions.
2. Cycle between degree, radian, and gradian mode for trigonometric calculations. Use parentheses for nested expressions and the memory keys (M+, M-, MR, MC) to hold a running total across calculations.
3. View your calculation history to reference or reuse previous results. Copy any result to clipboard.

When to use

• Solving math, physics, or engineering homework that needs more than a phone calculator.
• Quick sanity checks on a spreadsheet formula or a finance calculation.
• Computing trigonometry for woodworking, drafting, or quick angle conversions on a worksite.

Result

You need to calculate the hypotenuse of a right triangle with sides 3 and 4. Enter sqrt(3²+4²) and get 5. Then calculate the angle: enter atan(4/3) in degree mode to get 53.13°.

FAQ

Does the calculator follow order of operations?

Yes — it respects parentheses, exponents, multiplication and division, then addition and subtraction (PEMDAS). 2 + 3 * 4 returns 14, not 20. Use parentheses to force a different evaluation order.

How do I switch between degrees, radians, and gradians?

Use the DEG/RAD/GRAD button at the top of the keypad. It cycles through all three modes. In DEG mode, sin(90) gives 1. In RAD mode, sin(90) gives about 0.894 because 90 radians is roughly 14 full rotations. In GRAD mode, sin(100) gives 1 because 100 gradians is a quarter turn. Pick the unit before you type the expression.

Can I use the result of one calculation in the next?

Yes. Press ANS to insert the last result. Or open the history panel to pick any of the recent answers and paste them into the new expression — useful for multi-step problems.

What's the difference between asin and sin⁻¹?

They're the same function — arcsine, the inverse of sine. The calculator labels the inverse trig keys as sin⁻¹/cos⁻¹/tan⁻¹ when INV is toggled on, but internally that becomes asin/acos/atan. The result is an angle.

Why does 0.1 + 0.2 not exactly equal 0.3?

Floating-point math represents most decimals as binary approximations, so 0.1 + 0.2 returns 0.30000000000000004. The calculator rounds the display to 12 significant digits, which masks the issue for everyday use but it's there in extreme precision.

Related Tools