MUTLI-LINE EDIT:  Editable multi-line display for very long expressions 

COLOR: Different colors separating numbers and functions 

LEFT-HANDER MODE:  Support Left-hander and Right-hander button layout 

WORKSPACES: Three independent calculation workspaces 

COPY AND PASTE: Support copy and paste from/to other apps

Besides, xcalc supports the following calculation and unit conversion 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 

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)

If you are looking for a quality scientific calculator for your iPad, xcalc is the one we recommend!