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The COVID-19 social distancing impact calculator was developed 100% @home.

scientific Length Adding Calculator

The Length Adding calculator allows you to add feet and inches.

Percentage calculator

The percentage calculator allows you to find out what the amount, the percentage, the percent amount, the percent increase or the percent decrease is, if you know any of the two.

Simple Tiling Calculator

This calculator allows you to calculate how many tiles you need to cover a simple rectangular area. Works both in metric and imperial units. Works for both rectangular and square tiles.

## Financial

Bond Valuation

The purpose of this calculator is to provide calculations and details for bond valuation problems. It is assumed that all bonds pay interest semi-annually. Future versions of this calculator will allow for different interest frequency.

Car Lease

This calculator lets you calculate your estimated lease payments.

General Loan

This calculator allows you to calculate monthly payment, interest rate, total payments, and total interest of your loan.

Loan Length Calculator

Enter how much you want to spend each month, an interest rate, and a loan amount and the calculator tells you how long it will take you to pay it off!

Stocks vs. Bonds

How much do I keep in stocks and bonds?

### Financial Savings

Future Value/Annuity Calculation

Find out how much to put away tax deferred to get a certain amount of money in the future, and how much you could expect to draw out of that money. Just put in some numbers to see!

How long until you are a millionaire?

This calculator allows you to calculate how long it will take until you reach your desired account balance.

IRA/401(k)/403(b) Retirement Calculation

Find out how much to put away tax deferred to get a certain amount of money in the future, and how much you could expect to draw out of that money. Just put in some numbers to see!

### Financial Home

Home Equity Calculator

Use this calculator to see how much you may be eligible to borrow.

How much house can I afford?

This calculator allows you to calculate the amount you can afford to pay for a mortgage.

Mortgage Payment

The Mortgage Payment Calculator allows you to calculate monthly payments, average monthly interest, total interest, and total payment.

Rent versus Buy Calculator

This calculator allows you to compare renting versus buying by entering how much you want to spend a month and how much down you would put into your house.

Simple Mortgage Payment Calculator

This calculator allows you to calculate monthly payment, average monthly interest, total interest, and total payment of your mortgage.

## Fun

Astrological Signs Calculator

Find out your Western Sun Sign, and your Eastern or Chinese Sign.

Days until Christmas

Use this calculator to find out how many days are left until Christmas.

The Love Calculator

Fill in your name and his/her name and find out what are the chances for the two of you!

Love Compatibility Calculator

To find out what the chances for you and your dream partner are, just fill in your and his or her Info and click Calculate.

## Sports & Hobbies

High Performance Bass Fishing Boat Speed Calculator

Online High Performance Bass Fishing Boat Speed Calculator

Miles per Hour Calculator

This calculator allows you to calculate miles per hour.

## Health & Fitness

Body Mass Index Calculator

This calculator allows you to calculate your Body Mass Index (BMI). Body Mass Index (BMI) is a person's weight in kilograms divided by the square of height in meters. Find out your BMI and what it means for your health.

Pregnancy Calculator

This calculator allows you to calculate your due date, conception date, and fetal age.

## Converters

Currency calculator

Currency calculator allows you to convert between currencies. Exchange between dollars, pounds, euro, yen, yuan, and many more.

Data Size Calculator

This calculator allows you to calculate data size in bits, nibbles, bytes, kilobytes, megabytes, gigabytes, and terabytes.

Temperature calculator

The temperature calculator allows you to convert temperature degrees between Celsius, Fahrenheit, Kelvin, Rankine, Delisle, Newton, Réaumur and Rømer. Enter a value in any field to see the other values.

## Math

Perches to square meters and square feet Calculator

Online Perches to meters and feet Calculator.

Stem and Leaf Plot

This calculator allows you to create a special table where each data value is split into a stem (the first digit or digits) and a leaf (usually the last digit).

The Length Adding calculator allows you to add feet and inches.

Percentage calculator

The percentage calculator allows you to find out what the amount, the percentage, the percent amount, the percent increase or the percent decrease is, if you know any of the two.

Simple Tiling Calculator

This calculator allows you to calculate how many tiles you need to cover a simple rectangular area. Works both in metric and imperial units. Works for both rectangular and square tiles.

The purpose of this calculator is to provide calculations and details for bond valuation problems. It is assumed that all bonds pay interest semi-annually. Future versions of this calculator will allow for different interest frequency.

Car Lease

This calculator lets you calculate your estimated lease payments.

General Loan

This calculator allows you to calculate monthly payment, interest rate, total payments, and total interest of your loan.

Loan Length Calculator

Enter how much you want to spend each month, an interest rate, and a loan amount and the calculator tells you how long it will take you to pay it off!

Stocks vs. Bonds

How much do I keep in stocks and bonds?

Find out how much to put away tax deferred to get a certain amount of money in the future, and how much you could expect to draw out of that money. Just put in some numbers to see!

How long until you are a millionaire?

This calculator allows you to calculate how long it will take until you reach your desired account balance.

IRA/401(k)/403(b) Retirement Calculation

Find out how much to put away tax deferred to get a certain amount of money in the future, and how much you could expect to draw out of that money. Just put in some numbers to see!

Use this calculator to see how much you may be eligible to borrow.

How much house can I afford?

This calculator allows you to calculate the amount you can afford to pay for a mortgage.

Mortgage Payment

The Mortgage Payment Calculator allows you to calculate monthly payments, average monthly interest, total interest, and total payment.

Rent versus Buy Calculator

This calculator allows you to compare renting versus buying by entering how much you want to spend a month and how much down you would put into your house.

Simple Mortgage Payment Calculator

This calculator allows you to calculate monthly payment, average monthly interest, total interest, and total payment of your mortgage.

Find out your Western Sun Sign, and your Eastern or Chinese Sign.

Days until Christmas

Use this calculator to find out how many days are left until Christmas.

The Love Calculator

Fill in your name and his/her name and find out what are the chances for the two of you!

Love Compatibility Calculator

To find out what the chances for you and your dream partner are, just fill in your and his or her Info and click Calculate.

Online High Performance Bass Fishing Boat Speed Calculator

Miles per Hour Calculator

This calculator allows you to calculate miles per hour.

This calculator allows you to calculate your Body Mass Index (BMI). Body Mass Index (BMI) is a person's weight in kilograms divided by the square of height in meters. Find out your BMI and what it means for your health.

Pregnancy Calculator

This calculator allows you to calculate your due date, conception date, and fetal age.

Currency calculator allows you to convert between currencies. Exchange between dollars, pounds, euro, yen, yuan, and many more.

Data Size Calculator

This calculator allows you to calculate data size in bits, nibbles, bytes, kilobytes, megabytes, gigabytes, and terabytes.

Temperature calculator

The temperature calculator allows you to convert temperature degrees between Celsius, Fahrenheit, Kelvin, Rankine, Delisle, Newton, Réaumur and Rømer. Enter a value in any field to see the other values.

Online Perches to meters and feet Calculator.

Stem and Leaf Plot

This calculator allows you to create a special table where each data value is split into a stem (the first digit or digits) and a leaf (usually the last digit).

scientific
## Help and Tips

### Color Coding

### Keyboard

### Tape and Tape Buttons

### Clearing Buttons

Backspace button clears the last digit.
### Memory Buttons

### Function Buttons

Square root button is used to calculate the square root of a number. Enter a number, then click square root button.

Simple number or constant.

Action that involves two numbers (i.e. 6+2).

Action that requires one number (i.e. 40%).

Clears something.

Gives a result.

Actions about the calculator or the tape.

Number formating actions fractions and scientific notation.

You can use your numeric keypad to insert numbers along with the keys 'enter', 'equals', 'backspace', 'delete', as well as the + - * / keys.

All calculations are saved on the tape. Click on any number or operator on the tape and change it at any time. Hit equals and the new result will appear.

You can use the print button to print out the tape.

Clear button clears the last input.

All clear button clears the calculator, tape, and resets any functions.

Memory clear button clears the memory.

Memory recall button retrieves the number you have in memory and places it in the display field.

Memory plus button adds the number displayed to the contents of the memory.

Memory minus button subtracts the number displayed from the contents of the memory.

Percent button is used to find the percentage of a number. Enter the percentage amount, click the % button, then enter the number you want the percentage of, and then click equals. i.e. 20% 125 = 25 where 25 is 20% of 125. Note: The percent function will also work if you enter the number first and then the percentage you want i.e. 125 %20 = 25.

To enter a fraction of the form 3/4. Click a number and then click fraction bar, then click another number.

You can use fraction space button to create a number of the form 5 3/4. Enter a number, then click fraction space, click another number and then click on the fraction bar button, lastly enter another number.

Decimal format button and Fraction format button work as pair. When you choose the one the other is switched off.

Decimal format button is used for all decimal work. Also to change a fraction of the form 3/4 to the decimal 0.75, or a fraction of the form 7/4 or a mixed number of the form 1 3/4 to the decimal 1.75. Click on the decimal format button, enter a fraction or mixed number, then click equals. If the fraction or mixed number is only part of the calculation then omit clicking equals and continue with the calculation per usual. i.e. 3/4 DEC x 6 =.

Fraction format button is used to work with all fractions. Also to change a decimal of the form 0.5 to the fraction 1/2, or change a decimal of the form 1.75 to a mixed number of the form 1 3/4 or to the fraction 7/4, or a fraction of the form 7/4 to the mixed number 1 3/4. Click the fraction format button, enter a decimal, click equals and then click on a fraction form and then click equals. If the fraction of decimal is part of a calculation, omit clicking equals and continue with the calculation.

Proper fraction button and Improper fraction button work as pair. When you choose the one the other is switched off.

Proper fraction button is used to change a number of the form of 9/5 to the form of 1 4/5. A proper fraction is a fraction where the numerator (top number) is less than the denominator (bottom number).

Improper fraction button is used to change a number of the form of 1 4/5 to the form of 9/5. An improper fraction is a fraction where the numerator (top number is greater than or equal to the denominator (bottom number).

You can use the view menu button to add fuctionality to the standard calculator.

You can add a scientific keypad to calculate logarithms, a trigonometric keypad to calculate angles, and a fraction keypad to form, add, subtract, divide, and multiply fractions.

You can also choose to hide the tape.

You can use the constants menu button to choose between most common constants, atomic and nuclear constants, electromagnetic constants, physico-chemical constants, universal constants, and x-ray constants.

X^2 is the square of a number or a number times itself. Enter a number, then click x^2.

X! is x factorial. X is a whole number greater than 0. A number in the form 4! is 4x3x2x1 or 24. Enter a number, then click x!

1/x is the reciprocal of a number and x cannot be zero. Enter a number of the form 0.2 and get 5. Enter a number, then click 1/x.

This button is used to inverse x and y.

Base operation is used to set a number as base (i.e. decimal or hexadecimal system). Enter a number, then click base.

The modulo operation finds the remainder after division of one number by another. The expression "5 mod 2" would evaluate to 1, because 5 divided by 2 leaves a quotient of 2 and a remainder of 1. Enter a number, then click on MOD, then enter another number, then click equals.

Log is the logarithm (exponent) on base 10 of a number. The log of a number of 45 is log 45 and equals 1.653212. Enter a number, then click on Log.

In is natural log or the logarithm (exponent) on base e of a number. The In of a number of 45 is In 45 and equals 3.806662. Enter a number, then click on In.

Lg2 is the logarithm (exponent) on base 2 of a number. The log of the number 45 base 2 is lg2 45 and equals 5.49185. Enter a number, then click on Lg2.

Lgy^x you can use this to raise a logarithm to higher power.

Y^x you can use this to raise a number to higher power. Enter a number, then click y^x, then enter another number.

You can use the x-root-of-y button to find any root of a number. Enter a number (y), then click x-root-of-y button, then enter another number (x), and then click equals.

10^x is 10 raised to the x power (exponent). A number in the form of 10^4 is 10000. Enter a number (exponent), then click 10^x.

e^x is e raised to the x power (exponent). A number in the form e^4 is 54.5982. Enter a number (exponent), then click e^x.

2^x is 2 raised to the x power (exponent). A number in the form 2^4 is 16. Enter a number, then click 2^x.

The number e is an important mathematical constant that is the base of the natural logarithm. It is approximately equal to 2.71828.

The number pi is a mathematical constant, the ratio of a circle's circumference to its diameter, approximated as 3.14159.

Phi represents the golden ratio, two quantities are in a golden ratio if their ratio is the same as the ratio of their sum to the larger of the two quantities. It is approximately 1.61803.

You can use the scientific notation button to handle very large numbers, this system makes use of "powers of 10", raising 10 to whatever value you need. You can get either really big numbers by using positive powers like 10^5=100000. Or you can get really small numbers by using negative powers like 10^-5=0.00001. e stands for exponent and is used to represent "times 10 raised to the power of" (x 10^n). For example, if you want the number 100000000 as a scientific notation, you enter 10, then click SN, then 7, and then equals (10eX10^7=100000000).

You can use the parentheses pair to group terms. Every parenthesis you open is numbered, parenthesis levels are indicated by a number in the display box next to the parentheses buttons. This way you can easily know how deep in a parenthesis you are, when the expression is complete there are no parenthses left in the display box. This is used for groupings of the form 4+(9x(15-7)+6). Click the open parenthsis button, enter terms, then click the close parenthesis button.

You can choose between Gradian, Radian, and Degree unit modes, when you choose one the others are switched off.

The gradian (also known as gon) is a unit of plane angle. 1 grad = 1/400 tr = pi/200 rad = 9/10 deg.

The radian is the standard unit of angular measure. 1 rad = 1/2pi tr = approx. 57.296 deg = approx. 63.662 grad.

The degree is a unit of measurement of plane angle. 1 deg = 1/360 tr = pi/180 rad = 10/9 grad.

Sine finds the ratio y/r value of an angle. Enter a number, then click sin.

Cosine finds the ratio x/r value of an angle. Enter a number, then click cos.

Tangent finds the ratio y/x value of an angle. Enter a number, then click tan.

Sinh is the hyperbolic sine or sinh value of an angle. Enter a number, then click sinh.

Cosh is the hyperbolic cosine or cosh value of an angle. Enter a number, then click cosh.

Tanh is the hyperbolilc tangent or tanh value of an angle. Enter a number, then click tanh.

Asin is arcsine or sin^(-1). It finds the angle between -90 degrees and 90 degrees inclusive or between -pi/2 and pi/2 inclusive, with this sine value. Enter a number, then click asin.

Acos is arccosine or cos^(-1). It finds the angle between 0 degrees and 180 degrees inclusive or between 0 and pi inclusive, with this cosine value. Enter a number, then click acos.

Atan is arctangent or tan^(-1). It finds the angle between -90 degrees and 90 degrees inclusive or between -pi/2 and pi/2 inclusive, with this tangent value. Enter a number, then click atan.

Ash is arc hyperbolic sine, arcsinh or sinh^(-1). It finds the angle with this sh or sinh value. Enter a number, then click ash.

Ach is arc hyperbolic cosine, arccosh or cosh^(-1). It finds the angle with this ch or cosh value. Enter a number, then click ach.

Ath is arc hyperbolic tangent, arctanh or tanh^(-1). It finds the angle with this th or tanh value. Enter a number, then click ath.