# Online Fourier Transform Calculator

## Calculator for Fourier transform to any measured values or functions

The fast Fourier transform (FFT) is an algorithm for the efficient calculation of the discrete Fourier transform (DFT). It can be used to decompose a discrete-time signal into its frequency components and thus analyze it.

With the calculator, the Fourier transform can be applied to any measured values or alternatively to a function with equidistant samples. The number of samples must be a power of two for the FFT.

↹#.000
🔍↔
🔍↕

Axes ranges

x-min=
x-max=
y-min=
y-max=

Real part

🔍↔
🔍↕

Imaginary part

🔍↔
🔍↕

Amount

🔍↔
🔍↕

Phase

🔍↔
🔍↕
f(x):
f(x) Sampling:
Noise
Points:
Spline
Calculation with sampling of the function:
Interval:
min= max=

f(x)=

cl
ok
Pos1
End
7
8
9
/
x
4
5
6
*
1
2
3
-
π
(
)
0
.
+
sin
cos
tan
ex
ln
1/x
^
asin
acos
atan
x2
√x
ceil
floor
|x|
sinh
cosh
$\mathrm{sin}\left(\pi x+\frac{\pi }{4}\right)$
$\mathrm{cos}\left(\pi x+\frac{\pi }{4}\right)$
$\mathrm{tan}\left(\pi x+\frac{\pi }{4}\right)$
${\mathrm{sin}}^{2}\left(\pi x+\frac{\pi }{4}\right)$
${\mathrm{cos}}^{2}\left(\pi x+\frac{\pi }{4}\right)$
${\mathrm{tan}}^{2}\left(\pi x+\frac{\pi }{4}\right)$
$\frac{1}{\mathrm{sin}\left(x\right)}$
$\frac{1}{\mathrm{cos}\left(x\right)}$
$\frac{1}{\mathrm{tan}\left(x\right)}$
$\frac{\mathrm{sin}\left(x\right)}{\mathrm{cos}\left(\pi \cdot x\right)}$
$\mathrm{sin}\left(\mathrm{cos}\left(x\right)\right)$
${e}^{x}\mathrm{sin}\left(x\right)\mathrm{cos}\left(x\right)$
x+1 / x+2
x2-1/ x2+1
1 / x+1
1+√x / 1-√y
x+1
ex
x2+x+1
FunctionDescription
sin(x)Sine of x
cos(x)Cosine of x
tan(x)Tangent of x
asin(x)arcsine
acos(x)arccosine of x
atan(x)arctangent of x
atan2(y, x)Returns the arctangent of the quotient of its arguments.
cosh(x)Hyperbolic cosine of x
sinh(x)Hyperbolic sine of x
pow(a, b)Power ab
sqrt(x)Square root of x
exp(x)e-function
log(x), ln(x)Natural logarithm
log(x, b)Logarithm to base b
log2(x), lb(x)Logarithm to base 2
log10(x), ld(x)Logarithm to base 10
more ...
Calculation by means of table values:
Number of table values:

An alternative input is possible by loading the data from a file. The sampled values must be separated by comma, space or semicolon. At the end there must be a semicolon as termination.

## Table of the results of the FFT

### Screenshot of the Image

Print or save the image via right mouse click.

## Releated sites

Here is a list of of further useful sites:

Index Calculator for Fourier series expansion Curve fitting for: linear line, power function, polynomial, normal distribution Newton Interpolation Horners Method Trigonometric calculations Taylor series calculator Normal Distribution Plot NxN Gauss method Derivation rules ODE first order