If the Windows Calculator does not suffice your needs, here a Scientific Calculator called eCalc – Scientific Calculator which can be accessed right from your browser without the need of any plugins. It also has the functions of a basic calculator.It supports complex calculations like Unit Conversion, Equation Solver, Base Conversion, Constants also. eCalc has 2 input modes Algebraic and RPN Mode, It also stores the results of the past calculations in a stack and can be accessed by scrolling up and down.

**Also Checkout :**

**SpeedCrunch – Portable Scientific Math Calculator****ConvertBot – iPhone Unit Converter With Support To Over 520 Units and 100+ Currencies****EnCalc – Portable Windows Calculator**

**What Calculations Can eCalc Perform :**

- Trigonometry
- Algebra
- Scientific Math
- Equation Solver
- Complex Numbers
- Unit Converter
- Decimal to Fraction
- RPN or Algebraic

**eCalc** also available as a iPhone or iPod Touch app, which costs **$4.99** but the number of calculations it performs it completely eliminates the need of a handheld scientific calculator.Here’s a list of functions that the iPhone/iPod Touch can perform :

- RPN mode
- 24 trigonometry functions
- Factorial, remainder, inverse, power, and logarithmic functions
- Complex number support in rectangular and polar forms
- Decimal to fraction converter
- Base converter (decimal, octal, hexidecimal, binary)
- Linear equation solver
- Polynomial root solver
- 24 built in constants
- 125 unit conversions (12 categories)

The app also comes with Six math help PDF documents, which can be referred for the formulae of

- Algebra
- Calculus Derivatives/Integrals
- Geometry
- Trig Definitions, Laws, & Identities

If your on the Windows Platform there is also a free desktop version eCalc with basic functions.

NeoWow, this calculator is awesome… Thanks a ton!