About Numelva

What Numelva is for

Numelva helps you understand the numbers behind everyday decisions: savings, borrowing, budgets, dates and units. Tools are free and do not require an account.

Our methods

Calculations run in your browser using explicit assumptions. Loan tools use fixed rates and monthly amortisation; converters use fixed unit factors; date tools distinguish civil dates and working days. Displayed figures are rounded.

Checks and sources

The code includes automated checks for formulas, dates, conversions and exports. These help detect regressions but are not professional certification. Each tool includes an example and limitations. External references are linked where applicable.

Limits

Financial results are estimates, not offers or personalised recommendations. The pregnancy date tool does not replace clinical assessment. Holiday calendars are not automatically loaded. A countdown never invents an exact date for an unknown astronomical event.

Independence

This version does not show advertising or affiliate links. If advertising is introduced, it will be separated from results and the privacy information updated before activation.