Write the expression, read the answer
Type a whole expression instead of pressing keys one at a time. Handles sin, cos, log, square roots and brackets with the right order of operations.
Button-by-button calculators lose you halfway through a long expression. Here you type the whole thing, see exactly what you entered, and fix a typo without starting over.
Operator precedence follows normal mathematical rules, so 2 + 3 × 4 gives 14 rather than 20. Brackets override that when you need them to.
The evaluated result of a full expression Trigonometric, logarithmic, exponential and root functions A visible input line, so mistakes are easy to spot and correct Trigonometric functions take radians, the standard in mathematics and programming. Floating-point arithmetic means results like 0.1 + 0.2 can land on 0.30000000000000004. Does it use degrees or radians? Radians. To use degrees, multiply by π/180 first — sin(30 × π/180) gives 0.5, the sine of 30 degrees.
How do I write powers? With the caret: 2^10 is 1024. Square roots use sqrt(), so sqrt(144) returns 12.
Why does 0.1 + 0.2 not equal exactly 0.3? Computers store decimals in binary, and a third of the way through, 0.1 has no exact binary form. Every calculator on this hardware inherits that; it only shows up at the fifteenth decimal place.
Can I use π and e? Yes, both are recognised by name. pi * 2^2 gives the area of a circle with radius 2, or 12.566.
Worked example Compound growth over five years
Input: 1000 * (1 + 0.07)^5
Output: 1402.55
Note: Seven percent a year for five years turns 1000 into just over 1400 — the extra 52 above simple interest is compounding.
