Perform complex calculations with trigonometric, logarithmic, and exponential functions.
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What is the Scientific Calculator?
A scientific calculator is a digital tool that performs advanced mathematical operations beyond basic arithmetic. It includes functions for trigonometry (sine, cosine, tangent), logarithms (natural log, log base 10), exponents, factorials, and inverse operations—all the operations you'd find on a Casio FX-991 or graphing calculator, but free and in your browser.
How it works
Enter your expression using numbers, operators, and function buttons (sin, cos, tan, log, etc.). The calculator respects order of operations (PEMDAS/BODMAS), so it solves exponents before multiplication, and multiplication before addition. You can chain multiple operations together—for example, typing '2^3 + sin(45°)' calculates 2 to the power of 3, then adds the sine of 45 degrees. Parentheses group sub-calculations, and built-in constants like π and e are pre-defined for convenience.
Examples
Input
Result
Notes
sin(30°) + cos(60°)
1
Trigonometry: sine of 30° is 0.5, cosine of 60° is also 0.5; 0.5 + 0.5 = 1
log₁₀(1000)
3
Logarithm: 10 to the power of 3 equals 1000, so log₁₀(1000) = 3
Select your calculation mode: degrees or radians (for angle-based functions)
Type or tap numbers and operators—use the function buttons for sin, cos, tan, log, etc.
Use parentheses to group operations if needed (e.g., '(3+4)×2')
Press equals or Enter to see the result instantly
Clear the display and start a new calculation anytime
Copy results to clipboard or use the answer in the next calculation
Benefits
Replaces expensive handheld scientific calculators—fully free and always accessible
No installation required—works in any web browser on desktop, tablet, or phone
Instant visual feedback with a clear display and no lag on complex operations
Perfect for students, engineers, and scientists tackling trigonometry, calculus, and physics
Supports both degree and radian modes for angle calculations
Stores calculation history so you can review or reuse previous results
Tips & common mistakes
Common mistakes
Forgetting to set the correct angle mode (degrees vs. radians)—sin(90°) in degree mode is 1, but sin(90) in radian mode is 0.89
Assuming the calculator reads math notation exactly as written—always check order of operations; '1 + 2 × 3' is 7, not 9
Not using parentheses when needed—'2^3+1' is 9 (2³ + 1), but '2^(3+1)' is 16 (2⁴)
Inputting invalid arguments—square root of a negative number has no real solution; use complex number support if available
Tips
Memorize keyboard shortcuts (like 'Shift+P' for π) to speed up repeated calculations
Test your calculator on a known result first—try '2 + 2 = 4'—before tackling hard problems
Break long calculations into smaller chunks and check intermediate results to spot errors early
Use the memory function (M+, M−, MR) to store intermediate answers if the tool offers it
Frequently asked questions
What's the difference between natural logarithm (ln) and log base 10?
Natural logarithm (ln) uses base e (≈2.718), while log₁₀ uses base 10. ln(e) = 1 and log₁₀(10) = 1. Use ln in calculus and exponential growth; use log₁₀ in engineering and pH calculations.
Why does sin(90°) equal 1 but sin(π/2) sometimes looks different?
The calculator must be in the correct mode: degree mode for 90°, radian mode for π/2 radians. 90° and π/2 are identical angles, but the input format differs. Always check the mode indicator.
Can I use this calculator for exams?
Check your exam rules first. Most standardised tests (SAT, A-Level, IB) allow non-graphing scientific calculators; this tool is equivalent to a basic scientific calculator. Graphing and programming features may violate exam conditions.
How do I calculate a square root or cube root?
Use the power operator: √x = x^(1/2), ∛x = x^(1/3), etc. For example, √25 = 25^0.5 = 5, and ∛8 = 8^(1/3) = 2.
What does 'e' mean in scientific notation (e.g., 1.5e10)?
'e' stands for exponent (base 10). 1.5e10 = 1.5 × 10¹⁰ = 15,000,000,000. Use this shorthand for very large or very small numbers.
Can I store results and use them in the next calculation?
Yes—most scientific calculators auto-store the last result in a variable (often called 'Ans' or 'Last Result'). Check your calculator's interface for the memory or answer button.