Online Calculator

This lesson demonstrates how an Excel calculation model can become an online calculator in the SpreadsheetWeb Legacy Platform. Visitors provide the required inputs through a browser interface, and the workbook returns the calculated result without exposing the original file or formulas. The example also illustrates how a calculator can collect user details, send an automated email, and produce a PDF report as part of the same interaction.

Online calculators are useful for estimates, assessments, pricing, engineering calculations, financial models, and lead-generation tools. Prepare the workbook by defining the minimum inputs, protecting calculation cells, and designing a clear result area. Decide which information may be stored or emailed and provide appropriate privacy notices when collecting personal details. Test typical, minimum, maximum, and invalid values, then compare every result with Excel. If the calculator produces a document or message, verify that its formatting and values remain correct across the full test set.