**NICKZOM CALCULATOR***Free/ $25.99*The calculator encyclopedia consists of two calculators, the Nickzom and Nickzom+ calculators. The Nickzom calculator is an app that solves calculations and shows the steps on Mathematics, Physics, Engineering and Unit Conversions for quick and easy understanding.

The goal of this math app is to provide one with solutions and steps to his or her calculations. Alongside a basic and scientific calculator. In Mathematics, Engineering, Physics and Unit Conversions, this app presents the formula, equations, parameters and operations, steps and answer to your question. The Nickzom+ has added calculator features for Health/fitness, Age, Basic, BMI, Date, Financial, Time, Time Zone, IP Subnet, Number Base and Scientific calculator and 30+ Unit Converters,

A very lovely app, simple UI for everyone. it’s like an answer to all your problems.

https://play.google.com/store/apps/details?id=com.nickzom.nickzomcalculator**CALCU***Free/$1.99*Calcu is one of the most popular calculator apps for Android. It features all of the basics. Some other features include a calculation history, memory keys, various customization features, themes, and gesture controls.

It’s not a full scientific calculator, but it does have enough functions that goes beyond what you normally find in basic calculators with nice themes to suit your style. So if you’re looking for something a bit more than the basics, this works. The free version of the app contains ads.

https://play.google.com/store/apps/details?id=com.candl.athena**GOOGLE CALCULATOR***Free*The Google Calculator provides simple and advanced mathematical functions in a beautifully designed app. Performs basic calculations such as addition, subtraction, multiplication, and division

You can get some more complex functions by swiping in from the right side, but it’s still rather limited, with a set of functions like trigonometry, logarithm etc. which are available. The other major feature is the three-dot tab. You can tap the top of the screen to reveal a three-dot menu that allows you to change decimals to fractions—and that’s about it. There’s no history or graphing.

https://play.google.com/store/apps/details?id=com.google.android.calculator**DEMOS GRAPHING CALCULATOR***Free*Demos Graphing Calculator is a good graphing calculator app substitute for the more popular handheld graphing calculators. It can do the basic stuff like most calculator apps. There is also a variety of scientific calculator options available. It can also do statistics, tables and more. Graphs are interactive with tons of data to share.

Additionally, tables and statistics can be customized. It will work well for most types of academia. It’s completely free with no in-app purchases.

https://play.google.com/store/apps/details?id=com.desmos.calculator**DIGITALCHEMY CALCULATOR***Free/$1.99*Digitalchemy has developed three calculator apps on Google play store Calculator plus, Fraction calculator and Artful calculator. The Calculator plus and the Artful calculator are basic calculators but with the latter having more themes. The Fraction calculator focuses more on fraction, carrying out all calculations in fractions. The Calculator plus is perfect for shopping, doing homework, balancing checkbooks, or even calculating taxes.

They are easy to use and beautifully designed to do things better than your phone or handheld calculator ever did.https://play.google.com/store/apps/developer?id=Digitalchemy,+LLC

**GRAPHING CALCULATOR BY MATHLAB***Free/$6.99*Graphing Calculator by Mathlab is a scientific graphing calculator integrated with algebra and is an indispensable mathematical tool for students from high school to those in college or graduate school, or just anyone who needs more than what a basic calculator offers. It is designed to replace bulky and costly handheld graphing calculators and works on virtually any Android device or tablet. Nice 3D graphical view for better representation. Good for academic work.

https://play.google.com/store/apps/details?id=us.mathlab.android.calc.edu

**FINANCIAL CALCULATOR***Free*Financial Calculators is a series of calculators to help you make sense and keep track of your finances. It features various modes that can help you easily calculate anything from Return of Investments(ROI), to loan interest and even taxes. There have been reported issues with a few of the modes, but the vast majority of them work pretty well. Anyone in need of keeping up with their finances should check this out. It’s completely free with no in-app purchases. It does have ads.

https://play.google.com/store/apps/details?id=com.financial.calculator

**HiPER SCIENTIFIC CALCULATOR***Free/$2.99*The calculator has 15 digits of significand and 3 digits of exponent in its free version and up to 100 digits of significand and 9 digits of exponent in HiPER Calc Pro. It has most of the basic scientific calculator functions, a built-in unit converter with over 200 units, and even some obscure features like a random number generator, permutations, etc. It detects repeating decimals and numbers can also be entered as fractions or converted to fractions. The Pro version has the “expression” mode in which you can write expressions in a natural way and watch your calculations. The result is displayed as a number, simplified expression etc.

https://play.google.com/store/apps/details?id=cz.hipercalc

**REALCALC**The RealCalc Plus is the Pro version of the RealCalc calculator app,designed to look and operate exactly like a real hand-held calculator. It has all the standard scientific functions plus fractions, degrees/minutes/seconds, history, memories, customizable unit conversions and constants. You can choose from a number of display styles and formats. It also supports binary, octal and hexadecimal calculations and has an optional RPN mode. RealCalc Plus is easy to use, but has full help included in the app.

http://www.quartic-software.co.uk/limk.html?id=plus_google

**CALCULATOR++***Free/$4.00*The Calculator++ offers more than the basic calculator. This app has both a Simple and an Engineer mode. It supports a wide variety of functions, a history of everything you’ve calculated, and it can even create graphs.

One cool feature is the swipe buttons. Swipe up on a button to activate the above option, and swipe down to activate the option below. It’s also customizable, with several different theme options available. Along with a widget for your home screen, it includes a floating window mode.

This app does contain ads. You can get rid of ads for $4. Overall, it strikes a nice balance between being simple and functional.https://play.google.com/store/apps/details?id=org.solovyev.android.calculator

If we missed any of your best calculator apps for Android, you can tell us about them in the comments section below.

## The Calculator Encyclopedia Solves For Input and Output Reflection Coefficients, Power Gains and Mismatch Factors of S Parameters in Microwave Analysis

The knowledge of microwave analysis is a very added advantage for any **Electronic Engineer** out there. It makes one better understand the networking system of a **two port **in relation to S parameter.

According to Wikipedia, the **S Parameters** describe the electrical behavior of linear electrical networks when undergoing various steady state stimuli by electrical signals.

Luckily, **Nickzom Calculator**, the calculator encyclopedia is happy to take care of all calculations dealing with S Parameter (Two Port Network) for you and also show you a step by step guide (workings) on how to solve this problem.

For the purpose of this post, I would show you how **Nickzom Calculator** solves for the following:

- Input and Output Reflection Coefficients
- Various Power Gains
- Mismatch Factors

First of all, you have to have access to this awesome software package.

One can access Nickzom Calculator+ (Professional Version) – **The Calculator Encyclopedia** via any of these channels:

Web – https://www.nickzom.org/calculator-plus

Android (Paid) – https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator

Apple (Paid) – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8

Once you have got access to the software package, please proceed to the **Calculator Map** then scroll to **Engineering**

## Nickzom Calculator Solves Formation Factor of Well Logging in Petroleum Engineering

According to Schlumberger OilField Glossary,

The ratio of the resistivity of a rock filled with water (R_{o}) to the resistivity of that water (R_{w}).

One can access Nickzom Calculator+ (Professional Version) – **The Calculator Encyclopedia** via any of these channels:

Web – https://www.nickzom.org/calculator-plus

Android (Paid) – https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator

Apple (Paid) – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8

On selecting **Petroleum, **a bunch of links to major topics in Petroleum Engineering is displayed. Scroll down to **Well Logging** and click on it.

According to **Wikipedia**,

**Well logging**, also known as **borehole logging** is the practice of making a detailed record (a *well log*) of the geologic formations penetrated by a borehole. The log may be based either on visual inspection of samples brought to the surface (*geological* logs) or on physical measurements made by instruments lowered into the hole(*geophysical* logs).

Continue reading Nickzom Calculator Solves Formation Factor of Well Logging in Petroleum Engineering

## The Calculator Encyclopedia Converts Units of Sound

According to Wikipedia,

The **decibel** (symbol: dB) is a unit of measurement used to express the ratio of one value of a physical property to another on a logarithmic scale. It can be used to express a change in value (e.g., +1 dB or −1 dB) or an absolute value. In the latter case, it expresses the ratio of a value to a reference value; when used in this way, the decibel symbol should be appended with a suffix that indicates the reference value, or some other property. For example, if the reference value is 1 volt, then the suffix is “V” (e.g., “20 dBV”), and if the reference value is one milliwatt, then the suffix is “m” (e.g., “20 dBm”).^{}

Also, according to Wikipedia,

The **neper** (symbol: Np) is a logarithmic unit for ratios of measurements of physical field and power quantities, such as gain and loss of electronic signals. The unit’s name is derived from the name of John Napier, the inventor of logarithms. As is the case for the decibel and bel, the neper is a unit defined in the international standard ISO 80000. It is not part of the International System of Units (SI), but is accepted for use alongside the SI.^{}

Nickzom Calculator+ (Professional Version) – The Calculator Encyclopedia converts the units of sounds and at the moment, it converts **three** of them which are:

- Bels
- Decibels
- Neper

Click on **Sound Switches**

For the purpose of this post, we are to convert 45 Decibels to Neper

Continue reading The Calculator Encyclopedia Converts Units of Sound

## The Calculator Encyclopedia Converts Magnetic Flux Density Units on Magnetism Unit Conversions

According to Mini Physics,

**Magnetic flux density **(B) is defined as the force acting per unit current per unit length on a wire placed at right angles to the magnetic field.

Nickzom Calculator converts **11** units of magnetic flux density such as:

- Tesla
- Weber/sq. meter
- Weber/sq. centimeter
- Weber/sq. inch
- Maxwell/sq. meter
- Maxwell/sq. centimeter
- Maxwell/sq. inch
- Gauss
- Lines/sq. centimeter
- Lines/sq. inch
- Gamma

On Clicking on **Magnetism Switches**, there are 4 major magnetism unit conversion sections such as:

- Magnetomotive Force Switches
- Magnetic Field Strength Switches
- Magnetic Flux Switches
- Magnetic Flux Density Switches

## The Calculator Encyclopedia Converts Radiation- Exposure Units in Radiology Unit Conversion

According to Wikipedia,

**Radiation exposure** is a measure of the ionization of air due to ionizing radiation from photons; that is, gamma rays and X-rays.^{} It is defined as the electric charge freed by such radiation in a specified volume of air divided by the mass of that air.

Nickzom Calculator+ (Professional Version) – The Calculator Encyclopedia converts 7 units of **Radiation Exposure **which are:

- Coulombs/kilogram
- Millicoulombs/kilogram
- Microcoulombs/kilogram
- Roentgen
- Tissue Roentgen
- Parker
- Rep

One can access Nickzom Calculator+ (Professional Version) – **The Calculator Encyclopedia** via any of these channels:

Web – https://www.nickzom.org/calculator-plus

Android (Paid) – https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator

Apple (Paid) – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8

For the purpose of this post, I will display two different radiation – exposure unit conversions which are:

- Coulombs/kilogram to Tissue Roentgen
- Roentgen to Parker

Let’s begin with **Coulombs/kilogram** to **Tissue Roentgen**

Access the **Calculator Map**, scroll to **Switches** Section

Now, click on **Radiology Switches**, this would display four unit conversions under Radiology which are:

- Radiation Switches
- Radiation – Activity Switches
- Radiation – Exposure Switches
- Radiation – Absorbed Dose Switches

## Nickzom Calculator Solves Molar Concentration in Chemistry

According to Wikipedia,

**Molar concentration** (also called **molarity**, **amount concentration** or **substance concentration**) is a measure of the concentration of a chemical species, in particular of a solute in a solution, in terms of amount of substance per unit volume of solution. In chemistry, the most commonly used unit for molarity is the number of moles per litre, having the unit symbol mol/L. A solution with a concentration of 1 mol/L is said to be 1 molar, commonly designated as 1 *M*.

Nickzom Calculator+ (Professional Version) – The Calculator Encyclopedia requires two parameters to get the answer for a molar concentration in **Chemistry** such as:

- Number of Moles
- Volume

**The Calculator Encyclopedia** via any of these channels:

Web – https://www.nickzom.org/calculator-plus

Android (Paid) – https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator

Apple (Paid) – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8

First, go to the calculator map, scroll down to the **Chemistry** section and click on **Basic Chemistry**.

Now, click on **Molar Concentration** in **Chemistry**

Continue reading Nickzom Calculator Solves Molar Concentration in Chemistry

## The Calculator Encyclopedia Calculates the Overall Mass Transfer Co-efficient in Crystallization for Chemical Engineering

Nickzom Calculator+ calculates virtually all the mathematical problems faced by an undergraduate of chemical engineering.

Today, we would be handling the obtaining of answers on overall mass transfer co-efficient which is under crystallization in Chemical engineering by Nickzom Calculator+.

**The Calculator Encyclopedia** via any of these channels:

Web – https://www.nickzom.org/calculator-plus

Android (Paid) – https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator

Apple (Paid) – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8

First and foremost, if I want to get answers to my crystallization problem on Overall Mass Transfer Coefficient, I will proceed to my **calculator map** and click on **Chemical** (under **Engineering** Section).

## Nickzom Calculator Solves Future Value Calculations

According to Investopedia,

Future value (FV) is the value of a current asset at a specified date in the future based on an assumed rate of growth.

If, based on a guaranteed growth rate, a $10,000 investment made today will be worth $100,000 in 20 years, then the FV of the $10,000 investment is $100,000. The FV equation assumes a constant rate of growth and a single upfront payment left untouched for the duration of the investment.

According to Wikipedia,

**Future value** is the value of an asset at a specific date.^{} It measures the nominal future sum of money that a given sum of money is “worth” at a specified time in the future assuming a certain interest rate, or more generally, rate of return; it is the present value multiplied by the accumulation function.^{} The value does not include corrections for inflation or other factors that affect the true value of money in the future. This is used in time value of money calculations.

Nickzom Calculator+ (Professional Version) – **The Calculator Encyclopedia **has a **Future Value Calculator **this calculator requires certain parameters such as:

- Number of Periods
- Starting Amount
- Interest Rate
- Periodic Contribution
- Contribution at the beginning or end of each payment.

Continue reading Nickzom Calculator Solves Future Value Calculations

## The Calculator Encyclopedia Converts Units of Universal Fuel Economy

Nickzom Calculator converts 4 units in **fuel economy** such as:

- US Miles per gallon
- UK Miles per gallon
- Kilometers per liter
- Liters per 100 Kilometers

According to Wikipedia – Fuel Economy in Automobiles,

The **fuel economy** of an automobile relates distance traveled by a vehicle and the amount of fuel consumed. Consumption can be expressed in terms of volume of fuel to travel a distance, or the distance travelled per unit volume of fuel consumed. Since fuel consumption of vehicles is a significant factor in air pollution, and since importation of motor fuel can be a large part of a nation’s foreign trade, many countries impose requirements for fuel economy.

For the purpose of this post, let’s convert **US Miles per gallon** to **Kilometers per liter.**

Continue reading The Calculator Encyclopedia Converts Units of Universal Fuel Economy