TaxHow to calculate VAT in Spain from gross and net price
Learn how to add VAT, remove VAT and split taxable base with practical 21%, 10% and 4% examples.
Calculafy Blog
Practical guides to calculate VAT, percentages and compound interest with clear examples.
Tax
MathHow to calculate a percentage of an amount quickly
Methods to calculate percentages, discounts and increases with practical shopping and personal finance examples.
InvestingCompound interest with monthly contributions: practical guide
How to project future value, total interest and yearly growth when saving monthly over the long term.
MortgageHow to calculate mortgage payment step by step
Practical guide to estimate monthly mortgage payment, total cost and interest under the French method.
MortgageFrench amortization method explained
Understand how mortgage payments evolve over time and why early installments are interest-heavy.
MortgageAPR vs nominal rate: key differences before signing
Compare mortgage offers properly by understanding nominal rate vs APR.
NetworkingWhat is a subnet and why it matters
Subnetting fundamentals to organize networks, improve security and optimize performance.
NetworkingHow to calculate network, broadcast and usable hosts
Learn to calculate subnet boundaries and usable host ranges with practical examples.
NetworkingCIDR explained with real examples
Understand CIDR notation and how to choose /24, /27 or /30 prefixes based on host count.