Legal & Business
Professional business calculators created by experienced analysts for financial planning, legal computations, and business decisions. Our tools follow industry standards and regulations, trusted by entrepreneurs, consultants, and business professionals worldwide.
Legal & Business
Argentina CUIT Generator & Validator | Test Tax IDs
Generate and validate Argentina CUIT numbers for testing. Create mathematically valid tax IDs with correct check digits or verify existing CUITs instantly.
Argentinian CBU Generator & Validator (BCRA Format)
Generate a valid CBU (Clave Bancaria Uniforme) for testing, or check whether an existing 22-digit Argentine bank code passes the BCRA verification formula.
CNPJ Generator & Validator - Brazilian Business ID Tool
Generate valid Brazilian CNPJ test numbers and check whether a CNPJ passes the official check-digit formula used by Brazil's Receita Federal tax authority.
CPF Generator: Create a Valid Brazilian CPF Number
A CPF generator creates random Brazilian CPF tax ID numbers that pass the official check-digit algorithm, for use in software testing and form validation.
CUIT/CUIL Generator & Validator | Argentinian Tax ID Tool
Generate a valid Argentinian CUIT or CUIL tax ID number for testing, or check whether an existing number passes AFIP's official check-digit algorithm.
CURP Generator - Test Mexican ID Codes for Development
Generate random 18-character CURP codes in the official Mexican RENAPO format, complete with a valid check digit, for software testing and database seeding.
Detention Time Calculator - Water Treatment & HRT Tool
Find how long water stays in a tank or basin with this detention time calculator. Enter volume and flow rate to get results in hours, minutes, or seconds.
Federal Court Limitation Period Calculator
Calculate the filing deadline for a Federal Court case in Canada. Enter the case type and start date to get the expiry date and days remaining to file.
IBAN Generator and Validator - MOD 97 Check Tool
Generate valid test IBANs for 10 European countries or validate an IBAN with the MOD 97 check-digit formula. Runs in the browser with no data sent to a server.
Mexican CLABE Generator & Validator | Free Testing Tool
Generate valid Mexican CLABE numbers for software testing, or verify an existing CLABE's bank code, branch, and check digit. Free, no signup required.
Mexican RFC Generator for Testing | Free Online Tool
Generate valid Mexican RFC codes for software testing. Create up to 100 RFCs for individuals or companies with proper SAT format and verification digits.
Residency Calculator: Count Days by Country
This calculator adds up the days spent in each country from a list of date ranges and shows which country has the most days for a chosen calendar year.