CRCalc.js Exact Calculator

Scientific Calculator - Calculate mathematical expressions with scrollable high accuracy/precision up to 1,000,000 digits.

You can scroll through the result by dragging, using the mouse wheel, and arrow keys.

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Features

• Scrollable high precision display supporting 1,000,000 digits and more
• Trigonometric functions (sin/cos/tan/sin⁻¹/cos⁻¹/tan⁻¹)
• Hyperbolic trigonometric functions (sinh/cosh/tanh/asinh/acosh/atanh)
• Logarithm and exponential function
• Supports factorial calculations, up to 16,777,215! on Chrome v100+
• Supports constants e and π
• Supports exponentiation and square root calculations
• Supports switching between radian and degree modes
• Supports copying results and saving results to a file
• Open source

Notes

• Certain functions (e.g., x! or x^y) may need intensive computations and take a long time.
• Firefox may support fewer computable digits than Chrome/Edge.

Performance Tips

• This calculator uses Constructive Real arithmetic for precise arbitrary-precision calculations.
• Cached Constants (fast): π uses the Gauss-Legendre algorithm for quadratic convergence, and intermediate square root results are cached between different precision requests.
• Uncached Functions / Constants (slower at extremely high precision): ^, e, exp, ln, sin, cos, tan, asin, acos, atan, and their hyperbolic counterparts are recomputed from scratch using Taylor series or Newton iteration for each higher precision request. Scrolling through these results (tens of thousands of digits) can trigger progressively slower recalculations.

Optimization Tips

• π and square roots are highly optimized — you can scroll freely.
• e, trigonometric functions, and logarithms may slow down beyond 10,000 digits.
• For small integer powers, use multiplication instead of ^: x*x is much faster than x^2, and x*x*x is much faster than x^3. The power operator ^ even for simple cases falls back to log/exponent computation (exp(y*ln(x))), which involves uncached Taylor series evaluations.
• Use the Simplify button whenever possible to get simplified expressions instead of raw numbers.