xcalc for iPad is a scientific calculator with built-in metric conversion functions. It allows you to see the full expression input before a result is calculated, instead of calculating the result every time an operator is pressed.

USABILITY FEATURES:

1. Editable multi-line display for very long expressions
2. Colors separating numbers and functions
3. Support Left-hander and Right-hander button layout
4. Three independent calculation workspaces
5. Support copy and paste

CALCULATION FEATURES:

1. Trigonometric functions, with degree and radian modes
2. Logarithmic functions
3. Percentage increase and decrease functions
4. Parenthesis
5. Scientific notation input
6. Constants - pi, e, and golden ratio
7. Memory functions - temporary remember a calculated result

UNIT CONVERSION FEATURES

1. Length (inch, feet, yard, furlong, meter, kilometer, etc.)
2. Area (square inch, square feet, etc.)
3. Volume (fluid ounce, cup, pint, milli-litre, litre, cubic inch, etc.)
4. Temperature (celsius, kelvin, fahrenheit)
5. Weight (gram, ounce, pound, ton, Asian catty and tael, etc.)
6. Energy (calorie, joule, BTU, etc.)
7. Speed (mph, km/h, knot)
8. Power (horsepower, watt, kilowatt)
9. Pressure (atm, bar, pascal, mm Hg)