Mathlean · Online math workspace

Exponential distribution calculator

Calculate probabilities for an exponential waiting-time model.

How to use this calculator

Edit CDF(ExponentialDistribution(rate),time). The parameter is a rate, not the mean waiting time.

Tap the math below to edit it and see the result. Once a result is ready, press Tab on a hardware keyboard to accept it. Outside a matrix, Return completes the line; the phone math keyboard has the same Return action.

Try it here

CDF⁡(ExponentialDistribution⁡(2),1)\operatorname{CDF}\left(\operatorname{ExponentialDistribution}\left(2\right),1\right)

Interactive tools require JavaScript. You can read the guide and example without it.

What to know

Rate must be positive. The exponential model assumes a memoryless waiting time.

Mathlean combines visual mathematical input with computation and canvas tools. Results depend on the expression and available engine support; check important answers independently.

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