Calculate
Calculate is a Mac OS X widget for evaluating math expressions. Any JavaScript expression can be evaluated, and variables and functions are persistently stored. Works on both Mac OS X 10.4 (Tiger) and 10.5 (Leopard).
Comments from Calculate lovers
“I’ve tried a bunch of other calculator widgets but yours blows me away. Clean, simple, very ‘macintosh-esque’. I love it!” — Jay M
“I love the calculate widget! ... I am a math teacher and I have just started using your widget! It is great!” — Ebbe V
“It’s the formula calc widget with the richest functionality I have found.” — Magnus C
“Defintely the nicest widget calculator I’ve used.” — Gabe G
Arithmetic Operations
| -a | Change the sign of a |
| ~a | Bitwise NOT a |
| ++a | Add 1 to a (before using a) |
| a++ | Add 1 to a (after using a) |
| --a | Subtract 1 from a (before using a) |
| a-- | Subtract 1 from a (after using a) |
| a * b | Multiply a by b |
| a / b | Divide a by b |
| a % b | Find the remainder of division of a by b |
| a + b | Add a and b |
| a - b | Subtract b from a |
| a & b | Bitwise a AND b |
| a | b | Bitwise a OR b |
| a ^ b | Bitwise a XOR b |
| a << b | Shift a by b bits to the left (padding with zeros) |
| a >> b | Shift a by b bits to the right (copying the sign bit) |
| a >>> b | Shift a by b bits to the right (padding with zeros) |
Functions
Basic functions
| abs(a) | The absolute value of a |
| ceil(a) | Integer closest to a and not less than a |
| floor(a) | Integer closest to and not greater than a |
| max(a,b) | The maximum of a and b |
| min(a,b) | The minimum of a and b |
| pow(a,b) | a to the power b |
| random() | Pseudorandom number in the range 0 to 1 |
| round(a) | Integer closest to a |
| sqrt(a) | Square root of a |
Log functions
| exp(a) | Exponent of a |
| ln(a) | Log of a base e |
| log2(a) | Log of a base 2 |
| log10(a) | Log of a base 10 |
Trig functions
| sin(a) | Sine of a |
| cos(a) | Cosine of a |
| tan(a) | Tangent of a |
| csc(a) | Cosecant of a |
| sec(a) | Secant of a |
| cot(a) | Cotangent of a |
| asin(a) | Arc sine of a |
| acos(a) | Arc cosine of a |
| atan(a) | Arc tangent of a |
| atan2(a,b) | Arc tangent of a/b |
| acsc(a) | Arc cosecant of a |
| asec(a) | Arc secant of a |
| acot(a) | Arc cotangent of a |
Hyperbolic functions
| sinh(a) | Hyperbolic sine of a |
| cosh(a) | Hyperbolic cosine of a |
| tanh(a) | Hyperbolic tangent of a |
| csch(a) | Hyperbolic cosecant of a |
| sech(a) | Hyperbolic secant of a |
| coth(a) | Hyperbolic cotangent of a |
| asinh(a) | Hyperbolic arc sine of a |
| acosh(a) | Hyperbolic arc cosine of a |
| atanh(a) | Hyperbolic arc tangent of a |
| acsch(a) | Hyperbolic arc cosecant of a |
| asech(a) | Hyperbolic arc secant of a |
| acoth(a) | Hyperbolic arc cotangent of a |
More functions
Looking for more functions? Copy and paste these functions into Calculate, or write your own custom functions. Custom functions are automatically saved.
toDegrees = function (r) { return r * 180 / pi; }
toRadians = function (d) { return d * pi / 180; }
fibonacci = function (n) { var a = 0; var b = 1; for (var i = 1; i <= n; i++) { var c = a + b; a = b; b = c; } return a; }
factorial = function (n) { var result = 1; for (var i = 2; i <= n; i++) { result *= i; } return result; }
sign = function (x) { return x < 0 ? -1 : x > 0 ? 1 : 0; }
toHex = function (x) { return x.toString(16); }
toBin = function (x) { return x.toString(2); }
toUnicode = function (ch) { return ch.charCodeAt(0); }
Questions
- Q: Can you fix such-and-such math error?
A: Floating-point operations may introduce small accuracy problems. For example, "1.1 - 1.05" yields "0.050000000000000044". Since Calculate relies on JavaScript, there's nothing that can be done to fix the issue. - Q: Can Calculate automatically convert commas to periods for people using
international keyboards?
A: Calculate needs to work seamlessly with JavaScript to provide functions, and converting commas would cause problems. For example, converting "pow(2,5)" to "pow(2.5)" would break. As a workaround, using the comma on the numeric keypad will insert a period.
Changes in version 1.1.3
- Fixed focus bug introduced in version 1.1.2
Changes in version 1.1.2
- Numpad: The clear key clears the input area.
- Numpad (International keyboards): the comma on the numpad is inserted as a period.
Changes in version 1.1.1
- (Leopard only) Fix for autocompletion when Safari 3.1 is installed.
Changes in version 1.1.0
- (Leopard only) Added autocompletion of variables and functions names using the Tab key.
Type the first few letters of a variable name or function name, then press Tab.
For example,
1/an<TAB>autocompletes to1/answer. - Added degree mode.
- Added several new functions (log2, log10, and many trig & hyperbolic functions).
- Added several shortcut keys.
Changes in version 1.0.1
- Fixed minor layout issues in Leopard.
- Widget now has a “back” with a “check for new version” link.
- (Leopard only) Support for some Unicode variable names, like π (option-p).