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Scientific Calculator

Evaluate scientific expressions with powers, roots, logarithms, trigonometry, constants, factorials, angle modes, and reusable session history.

  • advanced calculator
  • trigonometry calculator
  • scientific expression
  • sin cos tan
  • logarithm calculator

Supports +, −, ×, ÷, ^, !, parentheses, pi, e, sqrt, sin, cos, tan, asin, acos, atan, log, ln, exp, abs, min, and max.

Angle mode

Status: initial

Results

Awaiting calculation

Scientific calculation history

Reuse up to 10 calculations from this page session, including their angle mode.

No scientific calculations yet. Evaluated expressions will appear here.

Calculator guide

A safe expression-based scientific calculator

Enter a complete expression using scientific functions and constants. The calculator parses supported mathematical syntax directly, never sends the expression to JavaScript eval, and records successful calculations in reusable session history.

When to use the scientific calculator

Use it for trigonometry, logarithms, powers, roots, factorials, scientific constants, and multi-step arithmetic. Choose the correct angle mode before evaluating trigonometric functions, then reuse earlier expressions from the history panel when comparing results.

How expressions are evaluated

The parser follows parentheses, factorial, exponents, unary signs, multiplication and division, then addition and subtraction. Trigonometric inputs and inverse-trigonometric results follow the selected degree or radian mode.

Variable explanations

Understand what each input and result means before calculating.

Expression

The complete mathematical statement to evaluate.

Angle mode

Determines whether trigonometric angles use degrees or radians.

pi and e

Built-in constants for π and Euler’s number.

Functions

Named operations such as sqrt, sin, log, and abs that require parentheses.

History

Up to 10 successful expressions, results, and angle modes retained for reuse during the current page session.

Reviewed by the Calculator.org.in Editorial Team

Formula behavior, validation cases, explanatory examples, and cited sources are checked before publication. This review supports educational accuracy and is not a substitute for qualified professional advice.

Last reviewed: 2026-08-23

Review process

Formula guide

See the calculation logic, variable definitions, and practical meaning.

Powers and roots

x^n; sqrt(x)

  • x is the base
  • n is the exponent

Use parentheses around compound bases or exponents.

Trigonometry

sin(x), cos(x), tan(x)

  • x uses degrees or radians according to angle mode

Inverse functions asin, acos, and atan return values in the same selected mode.

Logarithms

log(x) = log10(x); ln(x) = loge(x)

  • x must be positive

Use exp(x) for e raised to x.

Factorial

n! = 1 × 2 × ... × n

  • n is a non-negative integer no greater than 170

0! and 1! both equal 1.

Worked examples

Follow realistic inputs through the calculation step by step.

1

Worked example

Trigonometric identity

  1. 1Use degrees mode.
  2. 2Enter sin(30)^2 + cos(30)^2.
  3. 3The result is 1.
2

Worked example

Natural logarithm

  1. 1Enter ln(e^3).
  2. 2Exponentiation produces e cubed.
  3. 3The natural logarithm returns 3.
3

Worked example

Factorial and root

  1. 1Enter 5! / sqrt(16).
  2. 25! is 120 and sqrt(16) is 4.
  3. 3The result is 30.

Common mistakes

Avoid these common input and interpretation errors.

Wrong angle mode

sin(30) differs dramatically between degree and radian mode.

Missing function parentheses

Write sqrt(9), not sqrt 9.

Implicit multiplication

Write 2*pi rather than 2pi.

Invalid logarithm domain

Real logarithms require a positive argument.

Frequently asked questions

Quick answers to the questions users ask most often.

What functions are supported?
The parser supports sin, cos, tan, asin, acos, atan, sqrt, abs, log, ln, exp, floor, ceil, round, min, and max.
Does the calculator use eval?
No. It uses a purpose-built mathematical tokenizer and parser limited to documented syntax.
How do I enter π?
Use pi or the π character.
How do I calculate a factorial?
Place ! after a non-negative integer, such as 6!.
Why does a trigonometric result look unexpected?
Check whether the input is intended to be measured in degrees or radians.
Does it support complex numbers?
No. This release evaluates finite real-number expressions.
Can I reuse a previous scientific calculation?
Yes. Successful calculations appear in the history panel with their degree or radian mode. Select an entry to restore both inputs.

References

Sources used to support the calculator guidance.

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Version history

A transparent record of calculator content updates.

Updated 2026-08-23
  • 1.1.0 · 2026-08-23

    Added a reusable 10-entry scientific calculation history with expression, result, angle-mode restoration, deduplication, and clear control.

  • 1.0.0 · 2026-08-08

    Initial release with safe expression parsing, scientific functions, constants, factorials, and angle modes.