About Cromtra
Practical tools with transparent calculations
Cromtra builds focused calculators and browser-based document tools for everyday business and personal estimates.
What Cromtra provides
The site covers VAT and GST calculations, currency estimates, payment fees, profit margins, invoice totals, PDF invoices, and loan estimates. Tools are designed to show useful outputs without requiring an account.
How the tools are built
Calculator formulas are kept separate from the interface where practical, and explanatory pages describe the main assumptions. External reference data, such as currency rates, is identified and presented as informational rather than official transaction pricing.
Limits and responsible use
Cromtra provides estimates, not tax, legal, accounting, or financial advice. Tax rules, provider fees, exchange rates, lending terms, and invoice requirements can vary, so important decisions should be checked against authoritative information or a qualified professional.
Privacy-first tools
Public calculators do not require accounts. Invoice and document details are processed in the browser and are not intentionally included in analytics tracking or stored by a Cromtra backend.