Percentage change calculator

Percentage change calculator


Percentage change calculation

The percentage change from old value (Vold) to new value (Vnew) is equal to the old and new values difference divided by the old value times 100%:

percentage change = (VnewVold) / Vold × 100%

Example #1

Price percentage increase from old value of 1000$ to new value of 1200$ is caluclated by:

percentage change = (1200$ – 1000$) / 1000$ × 100%

 = 0.2 × 100% = 20%

Example #2

Price percentage decrease from old value of 1000$ to new value of 800$ is caluclated by:

percentage change = (800$ – 1000$) / 1000$ × 100%

 = -0.2 × 100% = -20%

Standard Deviation Calculator

Standard Deviation Calculator

All your calculations have now become easy with Standard deviation (σ) calculator, calculate your mean value & variance online.

Population & sampled standard deviation calculator

To calculate, enter the data values, delimited with the  spaces or with the commas and hit the calculate button.


Discrete random variable standard deviation calculator

You can enter the probability or the weight and the data number in all the rows.


Calculation for Whole population standard deviation

The value Population mean is apparently equal to,

population mean

The value of Population standard deviation is apparently equal to,

population standard deviation

Sampled data standard deviation calculation

The value of the Sample mean can be find with the help of the formula provided,

Sample mean

The formula to calculate sample standard deviation,

Sample standard deviation

Calculation for discrete random variable standard deviation

The value of the Random variable mean is apparently equal to,

random variable mean

The value of Discrete random variable standard deviation is apparently equal to,

random standard deviation

Variance calculator

Variance calculator

The Variance calculator is right now here to help you in  making calculations.

Population variance and sample variance calculator

Enjoy making calculations with this amazing tools, check now!


Discrete random variable variance calculator

We are presenting Discrete random variable variance calculator, all you need is to enter the probability or weight and  the data number in every row.


Whole population variance calculation

You can also calculate the population variance with easy tools, solve calculations now!

The formula for Population mean is:

population mean

The formula for Population variance is:

population variance

Sampled data variance calculation

The formula for Sample mean is:

Sample mean

The formula for Sample variance is:

sample variance

Discrete random variable variance calculation

The formula for Random variable mean is:

random variable mean

The formula for Random variable variance is:

random variance


Adding fractions calculator

Adding fractions calculator

Are you finding it difficult to add fractions? Add them now with easy calculators.

All you need to do is to enter the fractions and then press the “=” button. Put up fractions with a slash (/).


Fractions calculations

For instance,

If you need to add up 1/3 + 1/4



1/3 + 1/4 = (1×4+1×3) / (3×4) = 7/12

Multiplying fractions calculator

Multiplying fractions calculator

We are offering Multiplying fractions calculator online, to help you with calculations.

Enter the values in fractions and press the calculate button.

For example: 1/3 × 1/4

You can also enter the mixed numbers with space.

For example: 2 3/2 × 7/3


Multiplying fractions example

1/4 × 1/3 = (1×1) / (4×3) = 1/12

Greatest Common Factor Calculator

Greatest Common Factor Calculator

You can easily calculate the greatest common factor (GCF) with the help of this online calculator as the greatest common divisor (GCD).


GCF example

If you need to calculate the GCF for the numbers 18 and 27:

The divisors of 18 are:

18 = 3×3×2

The divisors of 27 are:

27 = 3×3×3

So the common divisors of 18 and 27 are:

gcf = 3×3 = 9

So 18/27 fraction, can be reduced to 2/3:

18/27 = 2/3

Antilog calculator

Antilog calculator

We are presenting Antilogarithm calculator online, that can help you calculate the inverse logarithm of a particular number.

Antilog calculator

If you are required to calculate the inverse function log-1(y) on this calculator, enter the required base b (10 is the default value, enter e for e constant), then enter the logarithm value y and lastly press calculate button.


When the value of y = logb x

The anti-logarithm or the inverse the logarithm can be calculated by raising the base b to logarithm y:

x = logb-1(y) = b y

Arctan Calculator

Arctan Calculator

We are presenting online arctan(x) calculator, or Inverse tangent calculator, check out now!

  1. Arctangent calculator
  2. Arctangent definition
  3. Arctan on calculator
  4. Arctangent table

Arctangent calculator

If you want to calculate arctan(x) with the online calculator, it is presented here, check now!

  1. Enter the values that you want to find out.
  2. Choose the result type in degrees (°) or in radians (rad) from the table provided.
  3. Press the calculate button to calculate the final result.


Arctangent definition

The value of the arctangent function is equal to the inverse function of y = tan(x).

arctan(y) = tan-1(y) = x+

As we all know that every k = {…,-2,-1,0,1,2,…}

For example, If the tangent of -45° is -1:

tan(-45°) = -1

Then the arctangent of -1 is -45°:

arctan(-1) = tan-1(-1) = -45°

Arctan on calculator

Are you looking on to calculate arctan(y) on an online calculator? check out now!

  1. Press shift and the tan buttons.
  2. Enter the angle for which you want to calculate.
  3. Press the equal button.

Arctangent table

Find out the tables from the values provided in the table, check out now!

y x = arctan (y)
degrees radians
1.732050808 60° π/3
1 45° π/4
0.577350269 30° π/6
0 0
-0.577350269 -30° -π/6
-1 -45° -π/4
-1.732050808 -60° -π/3

Arcsin Calculator

Arcsin Calculator

If you need to calculate the arcsin(x), then you can use this calculator:

  • Enter the desired input value.
  • Select the result type of degrees (°) or the radians (rad) in the space provided.
  • Hit the  =  button to find the result.


Arcsine definition

The arcsine function is called as the inverse function of the y = sin(x).

arcsin(y) = sin-1(y) = x + 2

As, we know for every k = {…,-2,-1,0,1,2,…}

For example, If the sine of 90° is 1:

sin(90°) = 1

Then the arcsine of 1 is 90°:

arcsin(1) = sin-1(1) = 90°

y x = arcsin(y)
-1 -π/2 -90°
-0.8660254 -π/3 -60°
-0.7071068 -π/4 -45°
-0.5 -π/6 -30°
0 0
0.5 π/6 30°
0.7071068 π/4 45°
0.8660254 π/3 60°
1 π/2 90°