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• Mortgage Calculator
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Help and Tips

Color Coding

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.

Keyboard

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

Tape and Tape Buttons

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.

Mortgage Calculator

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

Clearing Buttons

Clear button clears the last input.

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

Memory clear button clears the memory.

Memory Buttons

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.

Function Buttons

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.

Fractions

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).

Views

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.

Constants

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.

Scientific

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.

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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.

Trigonometric

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.

Large, easy and convenient online calculator

Use for work, school or personal calculations. You can make not only simple math calculations and calculation of interest on the loan and bank lending rates, the calculation of the cost of works and utilities.

Commands for the online calculator you can enter not only the mouse, but with a digital computer keyboard. Detailed instructions for using the calculator, see below.

Instructions for using the online calculator

Keys function

Calculator Online

[ 0 ], [ 1 ], [ 2 ], .. [ 9 ] - standard number keys;
[ 00 ] - key input 2 zeros;
[ → ] - remove the last character on the display;
[ +/- ] - change the mathematical sign of;
[ X^Y ] - calculation of X to the power of Y;
[ √ ] - calculate the square root;
[ + ] - addition, [ - ] - subtraction, [ х ] - multiplication, [ ÷ ] - division;
[ % ] - calculates percentages;
[ M+ ] - stored in the memory with the sign [ + ];
[ M- ] - stored in the memory with the sign [ - ];
[ MR ] - get the contents of memory;
[ MC ] - erases the memory content;
[ AC ] - reset the calculator and reset the memory;
[ C ] - resets the calculator without resetting the memory.

Examples of calculations on the online calculator

Calculate the square root of 529: 529 [ √ ]. The result is equal to 23.
Raise the number 3 to a power 4: 3 [ X^Y ] 4 [ = ]. The result is equal to 81.
Calculation of percentage of the number of: 500 [ х ] 25 [ % ]. The result is equal to 125.
Calculating what percent is one number of another number: 25 [ ÷ ] 500 [ % ]. The result is equal to 5(%).
Adding percentage to the number: 500 [ + ] 25 [ % ]. The result is equal to 625.
Deduction percentage of the number: 500 [ - ] 25 [ % ]. The result is equal to 375.

Enter commands from the keyboard PC/Mac

To use free online calculator you can use both ordinary numeric buttons at the top of a keyboard and numeric buttons on the right of a keyboard.

To enter [ = ] - key [Enter].
To erase the last character - [Backspace] (arrow keys).
To enter [ + ] - key [ + ] at the top or [ + ] key on the numeric keypad on the right.
To enter [ - ] - key [ - ] at the top or [ - ] key on the right.
To enter [ x ] (multiplication) - key [ * ] on the numeric keypad on the right or a combination of keys[ * ] and [ Shift ].
To enter [ ÷ ] (divide) - key [ / ] on the numeric keypad on the right or a combination of keys [ : ] and [ Shift ].

Frequently asked questions about the calculator

Why do we get 8 when trying to calculate 2+2x2 with a calculator?

Calculator performs mathematical operations in accordance with the order they are entered. You can see the current math calculations in a smaller display that is below the main display of the calculator.

Calculations order for this given example is the following: 2+2=4, subtotal - 4. Then 4x2=8, the answer is 8.

The History of calculators

The ancestor of the modern calculator is Abacus, which means 'board' in Latin. Abacus was a grooved board with movable counting labels (stones or bones).

Presumably, the first Abacus appeared in ancient Babylon about 3 thousand years BC. In Ancient Greece, abacus appeared in the 5th century BC.