Scientific Calculator

Type a calculation into the scientific calculator or use the function keys – the answer appears instantly with every step below. Angles in degrees, radians or gradians.

Source: ISO 80000-2:2019, ISO 80000-2 – Mathematical signs and symbols: operators, powers, percent. Updated: 30 September 2026.

How it is calculated

This scientific calculator covers everything a school or college calculator is used for: trigonometry, logarithms, powers and roots, factorials and combinations. It follows the order of operations (brackets, exponents, multiplication/division, addition/subtraction) and shows the working step by step.

Functions and input

sin, cos, tan and the inverses sin⁻¹, cos⁻¹, tan⁻¹ (also asin, arcsin …). Brackets are optional for a single number: sin 30.
ln (natural log), log (base 10), log2(x) and logb(x, b) for any base; eˣ and 10ˣ.
x², xʸ (^), √, ∛ and root(x, n) for the nth root.
x! (factorial up to 170!), nCr (combinations), npr(n, k) (permutations), mod(a, b), abs(x).
EXP inserts “×10^” for powers of ten; 6.02e23 works too. Constants: π and e.

Separate two arguments with a comma: nCr(49, 6) = 13,983,816 – the number of possible lines in a 6-from-49 lottery.

Degrees, radians or gradians?

School geometry usually works in degrees (full turn 360°), calculus and physics in radians (full turn 2π), and surveying in gradians (400 gon). Set the angle mode to match – sin(30) is 0.5 in degrees but −0.988 in radians. In degrees and gradians the calculator returns exact values on the axes: sin 180° = 0 rather than 1.2 × 10⁻¹⁶, and tan 90° is reported as “not defined”.

Precision

Calculations use IEEE 754 double-precision numbers and the answer is rounded to 15 significant digits. Irrational values such as √2 or π are necessarily rounded; simple fractions are recognised and shown as well (0.375 = 3/8). For powers, roots and logs with full reasoning use the exponent calculator; to plot functions use the graphing calculator. For everyday sums the basic calculator is enough.

Limits

This is not an exam-approved device and it does not do symbolic algebra (no variables or equation solving). It has no complex numbers, so √(−1) is reported as not defined. Everything stays in your browser.

Frequently asked questions

How do I switch the calculator to degrees?

Choose Degrees (DEG) under “Angle mode” – it is the default. Pick Radians (RAD) when the argument contains π, e.g. sin(π/2).

Why does my calculator not give 0.5 for sin(30)?

It is in radian mode. 30 radians is about 1719°, whose sine is −0.988. In degree mode sin(30) is exactly 0.5.

How do I calculate nCr?

Press nCr and enter both numbers separated by a comma: nCr(49, 6) = 13,983,816. For ordered arrangements use npr(n, k).

How do I type an nth root?

Use √ for square roots, ∛ for cube roots and root(x, n) or x^(1/n) in general: root(81, 4) = 81^(1/4) = 3.

Can it show answers as fractions?

Enter fractions as division (3/8 + 1/4). When the answer is a simple fraction it is shown too: 0.625 = 5/8.

Can I use this instead of a TI or Casio in an exam?

No – it is an online calculator for practice and checking work. Exams only allow the devices approved by your school or exam board.

Sources and legal basis

ISO 80000-2:2019: ISO 80000-2 – Mathematical signs and symbols: operators, powers, percent
IEEE 754-2019: IEEE 754 – Floating-point arithmetic (double precision, 15–17 significant digits)
DLMF §4.2: NIST Digital Library of Mathematical Functions – powers and roots
DLMF §4.14: NIST DLMF – Trigonometric functions: definitions and periodicity
DLMF §26.3: NIST DLMF – Binomial coefficients (nCr) and factorials

As of: 30 September 2026