Free calculators in Spanish for Spain and Mexico. No sign-up, no ads. 💰 Mortgage, salary (IRPF/ISR), VAT, loans, compound interest 📐 Unit converters: cm/inches, meters/feet, kg/lbs, °F/°C, liters/gallons 🔢 Number to words (for checks & contracts) 🍽️ Mexico: tip, IVA, salary (SAT 2025) 450M Spanish speakers deserve better tools.