🔢 Math Tool

Scientific
Calculator

Full scientific calculator with trig functions, logarithms, powers, memory, and calculation history — right in your browser.

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Frequently Asked Questions

What is the difference between DEG and RAD mode?▾

DEG (degrees) measures angles on a 0–360 scale used in everyday contexts. RAD (radians) is used in mathematics and physics where 2π = one full circle. sin(90°) in DEG equals sin(π/2) in RAD — both return 1.

How do I use the calculation history?▾

Click any item in the history panel on the right to load that result back into the display. You can then continue with further calculations from that value.

How does the memory function work?▾

M+ adds the current value to memory, M- subtracts it, MR recalls the stored value, and MC clears memory. When memory holds a value, it is shown below the display as "M: ...".

Can I enter complex expressions?▾

Yes — use parentheses to group operations (e.g., (2+3)×4). Use ^ for powers (e.g., 2^10) and EXP for scientific notation. The calculator evaluates standard mathematical operator precedence.

🔬 Complete Scientific Calculator Guide

How to Use Scientific Calculator and Math Basics

Trigonometry, logarithms, exponents, scientific notation — all scientific calculator functions fully explained.

Trigonometry and Logarithm Basics

Trigonometric functions (sin, cos, tan) represent the relationship between angles and side ratios. In a right triangle: sinθ = opposite/hypotenuse, cosθ = adjacent/hypotenuse, tanθ = opposite/adjacent. Radians to degrees: θ[rad] = θ[deg] × π/180.

Logarithms and Applications

log₁₀(x) is common log (base 10), ln(x) is natural log (base e ≈ 2.718). log(1000) = 3 means "10 to the 3rd power equals 1000". Logarithms are widely used in earthquake magnitude, sound decibels, and pH measurement.

Scientific Notation

Represent very large or small numbers as a × 10ⁿ. For example, speed of light 299,792,458 m/s = 2.998 × 10⁸ m/s; electron mass = 9.109 × 10⁻³¹ kg. Enter using the E button on calculators.

Key Mathematical Constants

πPi

3.14159265358979...Circles, trigonometry

eEuler's Number

2.71828182845904...Natural log, compound interest

√2Root 2

1.41421356237309...Right isosceles triangle

φGolden Ratio

1.61803398874989...Nature, aesthetic proportion

γEuler-Mascheroni

0.57721566490153...Harmonic series, analytic number theory

Statistics, Probability, and Combinatorics

Scientific calculators include factorial (n!), permutation (nPr), and combination (nCr) functions. 5! = 5×4×3×2×1 = 120. Combination nCr = n! / (r! × (n-r)!) is a foundation of probability. For example, choosing 3 from 10 people: 10C3 = 120 ways.

Binary, Octal, Hex Conversion

Many scientific calculators support DEC, BIN, OCT, HEX mode switching — essential for programming and digital circuit design. For example: decimal 255 = binary 11111111 = hex FF.

sin / cos / tan

Trig functions — angle to side ratio in right triangles

log / ln

Common log (base 10) and natural log (base e)

x² / x³ / xⁿ

Square, cube, and nth power calculation

√ / ∛ / ⁿ√

Square root, cube root, and nth root

n! / nPr / nCr

Factorial, permutation, combination

EXP / ×10ⁿ

Scientific notation input

ScientificCalculator