To cite package ‘calculiva’ in publications use:

  Calculiva (2026). _calculiva: Home Improvement Estimators for Mulch,
  Topsoil and Sod_. R package version 0.3.0,
  <https://github.com/calculiva/calculiva-r>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {calculiva: Home Improvement Estimators for Mulch, Topsoil and Sod},
    author = {{Calculiva}},
    year = {2026},
    note = {R package version 0.3.0},
    url = {https://github.com/calculiva/calculiva-r},
  }