Inverse Laplace Transform Calculator

Find the inverse Laplace transform

The calculator will try to find the Inverse Laplace transform of the given function.

Recall that $$$\mathcal{L}^{-1}(F(s))$$$ is such a function $$$f(t)$$$ that $$$\mathcal{L}(f(t))=F(s)$$$.

Usually, to find the Inverse Laplace transform of a function, we use the property of linearity of the Laplace transform. Just perform partial fraction decomposition (if needed), and then consult the table of Laplace transforms.

Related calculator: Laplace Transform Calculator

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The Inverse Laplace Transform Calculator is an online tool designed for students, engineers, and experts to quickly calculate the inverse Laplace transform of a function.

How to Use the Inverse Laplace Transform Calculator?

  • Input

    Type or paste the function for which you want to find the inverse Laplace transform.

  • Calculation

    Once you've entered your function, click the "Calculate" button. The calculator will process the function and compute its inverse Laplace transform.

  • Result

    After a brief moment, the calculator will display the result.

What Is Inverse Laplace Transform?

The Inverse Laplace Transform is an important operation in mathematical analysis and engineering, allowing us to translate a function from the frequency domain (or s-domain) back to the time domain. It undoes what the Laplace transform does.

Mathematical Formulation

Given a function $$$F(s)$$$ in the s-domain, the inverse Laplace transform, denoted by $$$\mathcal{L}^{-1}$$$ retrieves the original function $$$f(t)$$$ in the time domain:


Basic Formulae

Some common inverse Laplace transform pairs include:

  • $$$\mathcal{L}^{-1}_s(1)=\delta(t)$$$ – the impulse (Dirac delta) function.
  • $$$\mathcal{L}^{-1}_s(s)=\delta^{\prime}(t)$$$ – the derivative of the impulse function.
  • $$$\mathcal{L}^{-1}_s\left(\frac{1}{s}\right)=\theta(t)$$$ – the unit step (Heaviside) function.
  • $$$\mathcal{L}^{-1}_s\left(\frac{1}{s^2}\right)=t\theta(t)$$$ – the ramp function.


  • $$$\delta(t)=\begin{cases}\infty,t=0\\0,t\ne0\end{cases}$$$ is the Dirac delta function.
  • $$$\theta(t)=\begin{cases}1,t\ge0\\0,t\lt0\end{cases}$$$ is the Heavisde function.


Consider the function $$$F(s)=\frac{1}{s-a}$$$, where $$$a$$$ is a constant. The inverse Laplace transform of this function is


This means that if a function in the frequency domain is represented by $$$\frac{1}{s-a}$$$, its counterpart in the time domain is the exponential function $$$e^{at}$$$ multiplied by the unit step function.

Why Use the Inverse Laplace Transform?

Engineering and physical problems often involve differential equations because they describe how systems change over time. Solving these equations directly can be complex. The Laplace transform allows us to convert these differential equations into algebraic ones in the s-domain, making them easier to solve. However, the s-domain solutions may require analysis to understand the behavior of the system over time. That's where the inverse Laplace transform comes in. Translating the s-domain solution back to the time domain gives us a clearer view of the system's real-world dynamics.

In practical applications, such as electronic circuit design or control system analysis, engineers use the Laplace transform to determine a system's response in the s-domain. Once they have that response, they use the inverse Laplace transform to visualize how the system behaves over time, which is critical for design, debugging, and optimization.

The Inverse Laplace Transform is an indispensable tool that bridges the gap between mathematical solutions in the frequency domain and the corresponding solutions in the time domain.

Why Choose Our Inverse Laplace Transform Calculator?

  • Precision

    Our calculator is built using advanced algorithms, ensuring you receive accurate results every time, eliminating the error associated with manual calculations.

  • User-Friendly Design

    Our platform has been created keeping users in mind. Its intuitive interface means even those unfamiliar with the inverse Laplace transform can easily navigate and use the calculator.

  • Support for Complex Functions

    Unlike many calculators, ours can handle many functions, ranging from the simple to the complex, ensuring that a wide variety of needs are met.

  • Speed and Efficiency

    Our calculator processes inputs quickly, delivering results in a blink.


What is the Inverse Laplace Transform Calculator?

The Inverse Laplace Transform Calculator is a digital tool that aids users in computing the inverse Laplace transform of a given function. It translates functions from the frequency domain (s-domain) back to the time domain.

Can this calculator handle complex functions?

Our calculator is designed to process a wide range of functions, from basic to complex ones, making it suitable for various mathematical and engineering tasks.

How accurate are the results from this calculator?

The calculator is built using reliable mathematical algorithms, ensuring the results are highly accurate.