Mexico tools and calculators
Mexican identifiers such as the CURP, RFC and CLABE follow published structures and check digits. These tools validate those formats so a typo is caught before it reaches a bank or an agency.
This hub lists the 7 tools on TNAADO Tools that are specific to Mexico. The largest groups are Canadian Tools (4), Calculators (1) and Date & Time Tools (1). Every page is free, runs in your browser and names the rule or register it uses, so you can check the source before relying on the number.
Canadian Tools · 4 tools
CURP Validator and RFC Check for Mexico
CURP validator and RFC check for Mexico. Tests the CURP layout, date, state code and check digit, and the RFC format, in your browser. Not a RENAPO…
International · Mexico Paste a CURP (18 characters) or an RFC (12 or 13). The tool tells which it is and checks layout, date and check character. Nothing is sent. How it works: A CURP has 18 characters: 4 letters from the name, a YYMMDD birth date, a sex…
Mexico CLABE Validator
Free Mexico CLABE validator. Checks the 18-digit format and the real check digit (weights 3, 7, 1, mod 10). Format and checksum only. Runs in your…
International · Mexico Check an 18-digit CLABE, the standardized bank account number used for transfers in Mexico. Everything runs in your browser. How it works: each of the first 17 digits is multiplied by the repeating weights 3, 7, 1, each product is…
Validar CURP México | CURP Validator
Validar CURP: comprueba la estructura de 18 caracteres, la fecha de nacimiento, el estado y el dígito verificador. Free CURP validator, browser-only.
International · Mexico Validar CURP: check an 18-character Clave Única de Registro de Población for structure, a real birth date, a known state code and the check digit. Nothing is sent anywhere, and nothing is looked up. How it works: the CURP is 4 letters…
Validar RFC México | Mexico RFC Validator
Validar RFC de México: revisa formato, fecha y dígito verificador de un RFC de persona física (13) o moral (12). Free Mexico RFC validator…
International · Mexico Validar RFC: check whether a Mexican RFC has the right shape (13 characters for an individual, 12 for a company), a real date, and a last character that matches the check-digit formula. It runs in your browser and does not look the RFC…
Calculators · 1 tool
Amazon Mexico Fees Calculator: Referral and FBA
Amazon Mexico fees calculator: tarifa por referencia by category, FBA tarifa de gestión logística by weight and price, 16% IVA and profit per unit.
Amazon.com.mx seller fees Enter the price your buyer pays, the size class and shipping weight. The tool applies the referral fee and the FBA fulfilment fee for your price band, both quoted with IVA included, and shows profit per unit in pesos.
Date & Time Tools · 1 tool
RFC 3339 Timestamp Validator & Parser
Free RFC 3339 validator. Check a date-time against the section 5.6 grammar, see which rule failed, and get UTC time, epoch milliseconds and offset.
Date & Time · Validator Check a date-time against the RFC 3339 grammar, see exactly which rule failed, and get the normalised UTC time, epoch milliseconds and offset. Runs in your browser; nothing is sent anywhere.
Trade, Shipping & Packaging Tools · 1 tool
USPS International Letter Rates: Canada, Mexico
USPS international letter, large envelope and postcard postage to Canada, Mexico and everywhere else by ounce, with the nonmachinable surcharge, from…
Shipping · USPS Postage for letters, large envelopes and postcards mailed from the US to Canada, Mexico and the rest of the world, from the Notice 123 tables. A 1 oz international letter is $1.75 to any country. At 2 oz it is $2.35 to Canada, $2.60 to Mexico…
Why these tools are listed under Mexico
A tool is placed under Mexico when its address or title names the place, as with Amazon Mexico Fees Calculator and CURP Validator and RFC Check for Mexico, or when it sits in a section built for that country. The same tag is written into each page's structured data as the place it covers, so search engines and assistants can tell which rules a result was built for. Generic tools such as unit converters carry no jurisdiction and are not listed. Rates and thresholds change, so check the dated source on each tool before filing, paying or signing anything.