Scientific Calculator
Trig, logs, powers, roots and more
Scientific Calculator: Trig, Logs, Powers and Roots Online
This free scientific calculator handles everything from basic arithmetic to trigonometry, logarithms, powers, roots, factorials and combinations. You can type a full expression such as sqrt(2^3 + log(100)) * sin(30) or tap the keys, and the answer updates as you go. It works in degrees, radians or gradians, keeps a memory, remembers your recent calculations and shows each result in scientific notation and, where it exists, as a fraction.
Quick answer: in degrees mode, sin(30) is 0.5, log(1000) is 3, sqrt(144) is 12 and 5! is 120. The expression above gives 1.581139. Brackets that you leave open at the end are closed for you, so (2+3 is read as (2+3).
What the Scientific Calculator Can Do
Beyond the four basic operations, it offers sine, cosine and tangent with their inverses, hyperbolic functions, natural and base-10 logarithms, squares, cubes, any power or root, absolute value, factorials, percentages and remainders. The function tabs group them as Trig, Log & Power, More and Memory, and the More tab adds nCr and nPr for combinations and permutations, gcd and lcm, rounding functions and the constants π, e and τ. You can combine them freely, and write 2π or 3(4+5) without a multiplication sign.
Degrees, Radians and Gradians
Angles can be measured three ways, and the mode you choose changes how trig functions work. A full turn is 360 degrees, 2π radians or 400 gradians. In degrees, sin(90) is 1, but in radians the same input means 90 radians. The calculator returns exact values at quarter turns, so sin(180) in degrees is 0 rather than a tiny rounding error, and tan(90) is reported as undefined. Add the degree sign, as in sin(30°), to force degrees whatever the mode.
Formulas and Rules Used
The calculator reads your expression with its own parser rather than running it as code, and follows the order above. Powers are evaluated right to left, so 2^3^2 is 2^9 = 512, and -2^2 is -4.
Examples
| Type this | Function | Result |
|---|---|---|
| sin(30) | Sine (degrees) | 0.5 |
| cos(60) | Cosine (degrees) | 0.5 |
| tan(45) | Tangent (degrees) | 1 |
| log(1000) | Base-10 logarithm | 3 |
| ln(e) | Natural logarithm | 1 |
| sqrt(144) | Square root | 12 |
| 5! | Factorial | 120 |
| 2^10 | Power | 1024 |
| nCr(5,2) | Combinations | 10 |
| 17 mod 5 | Remainder | 2 |
Memory, History and Precision
MS stores the current result, M+ and M− add to or subtract from it, MR inserts it as M and MC clears it. Ans refers to your last saved answer, and the history list keeps your last twelve calculations; click one to load it again. You can show 6 to 15 significant digits. Internally the calculator uses standard double-precision numbers and tidies tiny rounding noise, so 0.1 + 0.2 shows 0.3. For comparing a result with a ratio, the fraction calculator and percentage calculator are handy partners.
Limits and Things to Know
This is a calculator for real numbers, so the square root of a negative number and similar results show an error instead of a complex answer. Factorials work for whole numbers up to 170, and very large or very small results appear in scientific notation. It does not graph functions or solve equations symbolically. Division by zero, logarithms of zero or negative numbers and inverse trig values outside -1 to 1 all produce a clear message. For right-angled shapes, the triangle calculator applies the same trig rules to sides and angles.
Who Can Use This Calculator?
Students use it for algebra, trigonometry, physics and chemistry homework, and teachers use it to check worked examples. Engineers, surveyors, programmers and anyone working with formulas can use it for quick checks without installing anything. It runs in your browser on phones, tablets and computers.
How to Use This Scientific Calculator
Choose the angle mode
Pick Degrees, Radians or Gradians before using sin, cos, tan or their inverses.
Enter your expression
Type it in the box or tap the keys. Functions open a bracket for you, like sin( and sqrt(.
Read the result
The answer appears as you type, with scientific notation and a fraction when one exists.
Save and reuse
Press = or Enter to save it to history, use Ans for the last answer, and the memory keys to keep a value.