I built a spreadsheet for modeling uncertainty directly in cells.

Cells can contain probability distributions, ranges, or distributions inferred from confidence intervals. Formulas then propagate that uncertainty through the sheet.

For example:

A1 = N.CI(10, 20)

B1 = U(2, 5)

C1 = A1 * B1

Instead of a single value, C1 becomes a sampled result.

The formula engine is powered by GaussFormula, a modification of HyperFormula that supports uncertain cells and sampled calculations.

The app is early and under active development and I would appreciate some feedback.