Scientific Calculator
Apply scientific functions to any number.
Results update as you type.
How it works
A scientific calculator extends basic arithmetic with the functions that appear throughout algebra, trigonometry, statistics and the sciences: roots and powers, sines and cosines and their inverses, natural and base-ten logarithms, exponentials, factorials, reciprocals and absolute values. Rather than crowding every operation onto one screen, this scientific calculator applies a single chosen function to your input, which keeps each result unambiguous and easy to check. Trigonometric functions read the angle in whichever unit you select, degrees or radians, so sin of 45 degrees returns approximately 0.707107 when degrees are chosen. Several of these functions are only defined over part of the number line, and getting that wrong produces nonsense. Logarithms need a positive argument, arcsine and arccosine accept only values from minus 1 to 1, and factorials are defined for non-negative whole numbers. When an input falls outside a function's domain, the tool should return no result rather than a misleading one, which is exactly what it does by showing a dash instead. Students and teachers working through trigonometry and precalculus, engineers and physicists evaluating formulas, and analysts handling logarithmic or exponential data all depend on a scientific calculator for accurate function values that mental math and a basic four-function device cannot provide.
Applies the chosen function; trig uses the selected angle unit
Each function reverses or extends a basic operation: a root undoes a power, a logarithm undoes exponentiation, and the inverse trig functions undo sine, cosine and tangent. Trigonometric values depend on how the angle is measured, so the calculator converts degrees to radians internally before evaluating, since the underlying math is defined in radians. That conversion is why sin of 45 degrees resolves to about 0.707107 only once the unit is known.
Source:Standard mathematics
We review all our tools from time to time to ensure accuracy.
Worked example
How to use this calculator
- 1
Enter your values
Enter value and function.
- 2
Adjust the options
Adjust angle unit if they apply — sensible defaults are already set.
- 3
Read your result
Result updates instantly as you type — no button to press.
Frequently asked questions
Does the calculator use degrees or radians?
Both, and you choose the angle unit for trigonometric functions. Selecting degrees interprets an entry of 45 as 45 degrees, so sin of 45 degrees returns about 0.707107; selecting radians treats the same number as radians instead and gives a different result. Non-trigonometric functions such as logarithms, roots and factorials ignore the angle unit entirely, since they operate on plain numbers rather than angles.
Why do some inputs return no result?
Certain functions are undefined for certain inputs, and the calculator shows a dash rather than invent a value. Logarithms require a positive argument, so the log of zero or a negative number has no real answer. Arcsine and arccosine accept only values between minus 1 and 1, and factorials need a non-negative whole number. When your entry falls outside the valid range, the blank result is the mathematically correct response.
What is the difference between ln and log?
Both are logarithms but use different bases. Natural log, written ln, uses the base e, roughly 2.71828, and appears throughout calculus and growth models. The log button here uses base 10, which counts powers of ten and suits scientific notation and decibels. They answer the same kind of question, namely what exponent produces this number, but against different bases, so their outputs for the same input differ.
How large a factorial can it calculate?
Factorials grow extremely fast, and above 170 the result exceeds the largest value standard floating-point numbers can hold. Beyond that point the calculator reports infinity rather than a finite figure, because the true answer is larger than the format can represent. For inputs up to 170, it returns the exact factorial, and it declines negative or fractional inputs since the ordinary factorial is defined only for non-negative whole numbers.
Can I use it for trigonometry homework?
Yes. It evaluates sine, cosine and tangent along with their inverses arcsine, arccosine and arctangent, in either degrees or radians to match your assignment. Choosing degrees, sin of 45 degrees gives about 0.707107, the value you would expect on a standard unit circle. Set the angle unit before you compute, since the same number produces a different result in radians, and the inverse functions return the angle in your chosen unit.