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Dev tools · September 13, 2025

Piecewise Function Calculator

Define & evaluate piecewise functions

Piecewise Function Calculator launched on September 13, 2025 with 6 votes, #3,421 of 8,160 launches that month. The site was not reachable when checked in September 2026.

What it does

Free online tool to define and evaluate piecewise functions. Create functions with multiple intervals and calculate values at any point.

Does a similar job

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  • IM
    I made a calculator that works over disjoint sets of intervalsApr 2026 · victorpoughon.github.io · ▲314

    I've been studying interval arithmetic for the past few weeks and it's a really interesting field because while there is a ton of super interesting research published over the past decades, it has never really gotten the recognition that it deserves, IMO. One reason for this is that standard interval arithmetic has really poor handling of division by intervals containing zero. If you compute 1 / [-1, 2] in regular interval arithmetic, you get either [-∞, +∞], or you have to say that the operation is undefined. Both solutions are virtually useless. The real answer of course is [-∞, -1] U…

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