Converters

Precise Calculator You can adjust a precision of this calculator (for example to 1000 digits). It knows all usual mathematical functions, statistical functions, prime numbers, PI, matrices, complex numbers, integral and it is programmable (commands if, goto, print, return, ...).

Free Portable Unit Converter Software - PicoConverter It is a powerful unit converter utility, that can convert more than 1,600 various units of measure in 26 categories. It comes with an easy and intuitive design that allow easy conversion while you type and quick swap between base and destinated unit.

Sheep Friends - kelly How simple can a calculator be? I tried to build the simplest one without any garbage. Don't get distracted by it's size. I am doing all my tax on it :) It stays on top and works well with Excel.

SheetCalculator Have you ever wished for a more powerful calculator utility to be included in your operating system? Have you ever been frustrated when using traditional calculators? Want calculators to be as intuitive as using pen and papers? Sheet Calculator is your answer. It is a powerful yet easy to use tool, meant for both advanced and casual users.

Freeware Feet and Inches Calculator And Tools Absolutely the best and easiest to use feet and inches (Architectural / Engineering) calculator. The feet and inches calculator accepts all commonly used types of foot and inches input including fractions. The simple interface makes it extremely easy to use.

Gas Price Calculator

Metric Convertor

Sales Tax Calculator

English2metric is a unit converter designed especially for non-technical users. The program can convert between any pair of units used in everyday life. Such features as special design, auto complete and the ability to choose visible units make the speed of all conversions lightning fast. In most cases, you need to type just the first letter of the unit. Whether you are a tourist, an immigrant, a chef, or anybody else, you will find English2metric very useful.

Dator - Gregorian-Islamic date converter Dator enables you to convert Gregorian dates into Islamic (Hijri) dates and vice versa. Simply enter a date in one calendar to obtain the equivalent date in the other calendar.

Astro Calculator Finding an object in the sky can be hard; especially if your a beginner and do not have a computer control telescope. Even with star charts, finding an object can be difficult because the stars in the sky are often more numerous than the stars shown on a chart. This calculator will not find an object for you, but it will help you find the correct part of the sky to look.

RUCalc is a great little calculator for the home or office. All the basic mathematical functions are there, along with +Tax and -Tax for adding and subtracting tax from your figures at the click of a button or the press of a key. (The actual tax amount is also displayed in the status bar at the bottom.)

EuroConvert

Universal Unit Conversion Program and Periodic Table.

Scientific & Currency calculator

Universal Unit Converter. a universal conversion program that converts units from time, length, area, volume and much more. Even comes with a breeding chart most useful for animal husbandry.

Home of Geometry, FractionCalc, & TeacherTool is a calculator which uses many of the formulas found in geometry. The program will calculate surface area and volume of a variety of geometric figures such as prisms, cone, sphere, pyramids, torus and cylinder. The software will perform calculations involving the pythagorean theorem, sine, cosine, tangent, special triangles, regular polygons, circles, arcs, triangles, squares, rectangles, distance, slope, midpoint, Law of Sines, Law of Cosines, and rotation. The interface includes drawings of each scenario and the formulas involved in the calculation.

Qmath Web-site Calculator with over 25 different functions (arithmetic, trigonometric, logarithmic) and hexadecimal/decimal modes.
Converter to convert between mathematical and measurement units. 21 groups and 190 units supported currently.
Plug-ins interface to extend functionality. 6 plug-ins included.
Plug-in for factoring numbers at lightning speed.
Plug-in for doing arithmetic with numerical fractions.
Plug-in for solving RPN (Reverse Polish Notation expressions).
Plug-in for solving quadratic equations.
Plug-in for doing arithmetic and logical functions on binary numbers and directly manipulating bits.
Plug-in for converting numbers between different bases (binary, decimal and hexadecimal).
Fast and power-full Qmath-Engine Library with large number of mathematical functions for developers to use while writing plug-ins.
Qmath can be hidden/unhidden in the System-Tray.

Conversion Calculator is a software which converts a value from a micro unit to a nano unit. A simple calculator to help you calculate values that are either too small or too large. Great for electronics hobbyist to find value of capacitor. Small in size, big in performance.

Fuel Consumption Calculator

Calculator.NET is an enhanced version of the standard calculator in Microsoft Windows.
Calculator.NET uses RPN (Reverse Polish Notation), which is used by many pocket calculators, e.g. from Hewlett-Packard.
If you have used a HP 11/28/32/42/48, or any other RPN calculator, you will feel right at home.

Free High Precision Complex Calculator This program does real or complex number calculations with 100-significant-figure precision. Many standard functions such as trig, hyperbolic, logarithms, etc., are included. Loops are supported. Both expressions and results can be saved to a file.

calcAnt - the calculator Ant Calculating with calcAnt is pretty easy: Enter numbers and operators using the numeric keypad as you would do with any pocket calculator.

dP Calculator is a small computer program that performs Pressure Drop Calculations for pipework. Related parameters such as Reynolds, fluid velocity, average residence time, etcetera are presented. The Pressure Drop calculation takes into account other components as well. It requests the user for input about bends, elbows and other appendages/equipment components, which induce extra pressure loss. The program represents the total resistance in terms of equivalent pipe length values.

Corner - is a program for calculating odd corners made from sheetmaterials like aluminium, steel, or glass. It could be the corners of aluminium- or steelfacades - or perhaps strangely-shaped fishtanks... If you are in that line of work or a bit interested in geometry, Corner will be very easy to use as you will recognize the scenario - if not Corner will be useless to you!

Home of Geometry & FractionCalc

Calc98 The calculator includes functions for statistics, use of different number bases (binary, octal, hexadecimal and base-n), metric units conversions and physical properties and constants. It has financial functions including investment, loan and mortgage calculations. It also calculates time functions and has a stopwatch feature and RPN (Reverse Polish Notation). It runs on Microsoft Windows (WindowsNT, Windows95/98/ME, Windows2000/XP) and WindowsCE (Pocket PC).

Vaibhav's Web Home Metric Converter

CalculEuro MiniCalcEuro is a small program in Visual C + that allows you to perform convert between Euro and all currencies of the Euro zone(to and from). It looks like a modal-dialog what means that it stays in foreground if one clicks of another one windows as for example a web site that is very practical. When an amount is entered The amounts in the other currency is automatically displayed.

Easy Currency Converter is a simple currency calculator. It converts about 200 world currencies including Euro and updates exchange rates with a single button click. Calculations are based on US Dollar <-> local currency exchange rate.

Advanced Subnet Calculator Are you tired of a Subnet Calculator with limitations? Other Subnet Calculators only do one function, don't allow Exporting, or require you to purchase to enable all the features. The Advanced Subnet Calculator from SolarWinds is COMPLETE and FREE (freeware).

Turbine Steam-Consumption Calculator This free program will calculate the steam consumption for a turbine of known power and efficiency. The required data are the inlet steam pressure and temperature, and the exhaust pressure. The program will determine the specific and actual steam consumption and the outlet steam enthalpy.

Uconeer Freeware Units Conversion for Engineers This free units conversion program is designed specifically for engineers. It includes a wide range of technical categories required by engineers, but it excludes the archaic and esoteric units that clutter the menus of the other conversion programs.

Calculate How Much Disk Space You Need For Your Streaming Media - Online Streaming Media Calculator

RjH Software - Unit Converter Unit Converter allows you to easily convert between units of measurement. Features include:
• Create and add new conversion routines.
• Categorize and save routines in seperate files.
• Control the format and precision of the result.
• Automatically copy the result to the clipboard.

CONVERT

Convert is an easy to use unit conversion program that will convert the most popular units of distance, temperature, volume, time, speed, mass, power, density, pressure, energy and many others, including the ability to create custom conversions!