Online Scientific and Engineering Calculator
Calculate sin, cos, tan, logarithms, powers and factorials.
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You can also use keyboard shortcuts
This tool is for information only. Use professional software for critical engineering or scientific calculations.
Core Functions in a Scientific Calculator
A scientific calculator follows parentheses and order-of-operations rules (BODMAS/PEMDAS), so you can build a complex calculation step by step. The display is wide enough to nest several functions.
Trigonometric Operations: Sin, Cos, Tan, Cot
Trigonometric functions come up constantly in geometry and physics: sine (sin), cosine (cos) and tangent (tan). With this tool you can find the ratio of an angle to side lengths in both degree (DEG) and radian (RAD) mode.
Powers and Square Root Calculations
Powers (x², xʸ), which mean multiplying a number by itself repeatedly, and the square roots (√x) and cube roots common in area and volume calculations each take a single key. They are especially useful when working with very large numbers (scientific notation).
Advanced Mathematical Operations
Advanced work such as statistical models, probability calculations and financial growth rates relies on the logarithm and factorial functions of a scientific calculator.
Logarithm (log) and Natural Logarithm (ln)
Many scientific scales are logarithmic (log), from the Richter scale for earthquake magnitude to the pH scale for acidity. The natural logarithm (ln) uses Euler's number 'e' as its base and is generally preferred for continuous growth (such as bacterial growth).
What Fields Use a Scientific Calculator?
A scientific calculator is a standard tool for engineering, physics, chemistry, trigonometry and statistics. Students preparing for university exams and professional engineers alike use one. Trigonometric functions, logarithms, exponents and combinatorics come up regularly in both academic and professional work.
Trigonometric Functions: sin, cos, tan
The sin, cos and tan functions are the basis of angle calculations. Angles in degrees or radians are used for triangle side ratios, wave motion and signal analysis. If the tool is in degree mode and you need a radian-based result, switch modes first; it is the simplest way to avoid wrong answers.
Logarithms and Exponential Functions
The log (base 10) and ln (natural logarithm) functions are common in chemistry, econometrics and sound level calculations. The exponential function (e to the power x, or x to the power n) underlies growth and decay models such as compound interest, bacterial growth and radioactive decay.