EZ Calculators

Scientific Calculator

Use this full scientific calculator for trigonometry, inverse trig, logarithms, roots, powers, factorials, percentages, and scientific notation. Switch between DEG and RAD, type complete expressions, reuse the previous answer, store values in memory, and reopen recent calculations from private on-device history.

Calculation and content reviewed by EZ Calculators Editorial Team on July 11, 2026.

What is a Scientific Calculator

A scientific calculator extends ordinary arithmetic with trigonometric functions, inverse trig, logarithms, roots, powers, factorials, percentages, constants, and scientific notation. It is useful for algebra, geometry, trigonometry, physics, engineering, statistics, and technical work where the order of operations matters.

This calculator accepts complete expressions and shows a live preview before you press equals. Calculations run locally in the browser, while the answer register, memory controls, and on-device history make multi-step work easier to review.

How to Use Scientific Calculator

Enter an expression with the keypad or keyboard. Use parentheses to control grouping, choose DEG for angles measured in degrees or RAD for radians, and press 2nd to reveal inverse trigonometry, exponential functions, and cube root. Press equals to save a completed calculation to history.

Use Ans to insert the previous answer into a new expression. M+ and M- add or subtract the current value from memory, MR recalls it, and MC clears it. The display keeps the expression and answer separate so long calculations remain easy to check.

  1. Choose DEG or RAD before entering a trigonometric expression.
  2. Enter numbers, functions, operators, and parentheses in the intended order.
  3. Read the live preview, then press equals to complete and save the calculation.
  4. Use Ans, memory, or history when the next calculation depends on an earlier result.

Scientific Calculator Functions and Formulas

The expression engine applies standard mathematical precedence: factorials and powers are evaluated before multiplication and division, followed by addition and subtraction. Parentheses can override that order. Trigonometric inputs and inverse-trig outputs follow the selected angle mode.

Percent is interpreted as division by 100, so 200 x 10% returns 20. The EXP key enters scientific notation, while x squared, x cubed, reciprocal, absolute value, factorial, square root, logarithm, and exponential controls transform the current expression.

Formula guide
  • Order of operations: parentheses, powers, multiplication/division, addition/subtraction
  • Powers: a^b means a raised to b
  • Square root: sqrt(x); cube root: cbrt(x)
  • Common logarithm: log(x); natural logarithm: ln(x)
  • Trigonometric functions use the selected DEG or RAD angle mode
  • Percent converts a completed value to value / 100

Scientific Calculator Examples

In DEG mode, sin(30) + sqrt(16) equals 4.5 because sin(30 degrees) is 0.5 and the square root of 16 is 4. In RAD mode, sin(pi / 2) equals 1. These examples show why the selected angle mode must match the problem.

For powers and percentages, 5! + 2^3 equals 128, while 200 x 10% equals 20. Use parentheses in expressions such as (12 + 8) / 4 to make the intended grouping explicit.

DEG vs RAD Mode

Degrees divide a circle into 360 parts, while radians measure angles using the radius of the circle. School geometry and everyday angle measurements often use degrees. Calculus, physics, engineering, and programming formulas frequently use radians.

A correct expression can still produce an unexpected answer when the angle mode is wrong. For example, sin(90) equals 1 in DEG mode, but sin(90 radians) is approximately 0.894. Check the mode before evaluating sine, cosine, tangent, or inverse trig.

  • Use DEG when angles are written with a degree symbol or described in degrees.
  • Use RAD when angles contain pi or the problem explicitly uses radians.
  • Inverse trig answers are returned in the currently selected angle unit.

Features for Multi-Step Calculations

The separate expression and answer lines help you verify what was entered before using the result. Live preview catches many entry mistakes early, while Ans continues from the previous answer without retyping a long decimal.

Memory supports M+, M-, MR, and MC operations. History stores the latest completed calculations on the current device and can restore an expression with its original angle mode. Clearing browser storage removes that history.

  • Six-column keypad with stable button positions on desktop and mobile.
  • DEG and RAD angle modes with inverse trigonometric functions.
  • Powers, roots, logs, factorials, percentages, constants, and scientific notation.
  • Previous-answer register, calculator memory, copy action, and local history.
  • Keyboard entry with Enter to calculate and Escape to clear.

Accuracy, Domains, and Common Errors

The calculator validates expressions against an allowed set of real-number functions and operators. It rejects assignments, unknown symbols, unsafe syntax, division by zero, and results that are infinite, undefined, or complex. Displayed answers are rounded for readability, so very long decimals are approximations.

Some functions have limited real-number domains. A square root needs a nonnegative input, a logarithm needs a positive input, and inverse sine or cosine needs a value from -1 through 1. Tangent is undefined at odd multiples of 90 degrees or pi/2 radians.

  • Check DEG or RAD before trigonometry.
  • Close every opening parenthesis.
  • Use explicit parentheses around a denominator or exponent when needed.
  • Do not round intermediate values when a later step needs more precision.
  • Treat displayed floating-point results as numerical approximations.
Math.js expression syntaxReview the expression grammar used by the calculator's underlying parser.Math.js expression parser securityRead how parsed expression trees avoid JavaScript eval and how applications can restrict supported operations.

Benefits of Using a Scientific Calculator

Scientific Calculator provides an answer and a visible method, so it can be used to check arithmetic as well as understand the setup. With Scientific Calculator, signs, operation order, simplification, factors, or units remain visible when they can change the result.

The main benefits of Scientific Calculator appear when users evaluate powers, roots, and logarithms, check trigonometry calculations, and keep order of operations clear in longer expressions. For Scientific Calculator, a baseline result and a one-variable comparison are usually more informative than two completely different cases.

Common Scientific Calculator Use Cases

Scientific Calculator can support several related questions without treating every situation as identical. Choose the Scientific Calculator use case that matches your goal, enter values from that case, and calculate a new set of assumptions as a separate comparison.

  • Evaluate powers, roots, and logarithms.
  • Check trigonometry calculations.
  • Keep order of operations clear in longer expressions.

FAQ

What can this scientific calculator calculate?

It supports arithmetic, parentheses, powers, square and cube roots, reciprocal, absolute value, factorial, percentages, scientific notation, pi, e, logarithms, trigonometry, and inverse trigonometry.

Does the scientific calculator use degrees or radians?

It supports both. Select DEG for degrees or RAD for radians before evaluating trigonometric expressions. Inverse-trig results also use the selected mode.

How do I calculate sine, cosine, or tangent?

Choose the correct angle mode, press sin, cos, or tan, enter the angle inside parentheses, and press equals. For example, sin(30) equals 0.5 in DEG mode.

How do I use inverse trigonometric functions?

Press 2nd to change sin, cos, and tan into inverse sine, inverse cosine, and inverse tangent. The resulting angle is shown in DEG or RAD according to the selected mode.

What is the difference between log and ln?

Log calculates the base-10 logarithm. Ln calculates the natural logarithm with base e. Both require a positive real-number input.

How does the percent key work?

A value followed by percent is divided by 100. For example, 10% becomes 0.10, so 200 x 10% equals 20.

How do I enter scientific notation?

Enter the coefficient, press EXP, and enter the exponent. For example, 6.02 EXP 23 represents 6.02 x 10^23.

What does Ans do on a scientific calculator?

Ans inserts the most recently completed answer. It is useful when a new calculation depends on a previous result without requiring you to retype the full value.

How do M+, M-, MR, and MC work?

M+ adds the current value to memory, M- subtracts it, MR inserts the stored value, and MC clears memory. The memory indicator shows when a value is stored.

Is scientific calculator history private?

History is stored locally on the current device through browser storage. It is not submitted as an account or calculator request, and clearing browser storage removes it.