Dev tools · September 13, 2025
Piecewise Function Calculator
Define & evaluate piecewise functions
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
all alternatives →- IMI 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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