Editorial guides
Practical online tool guides
Editorial explainers about the concepts, formulas and workflows behind tools.junyo.dev, always linking to the right tool.
How to calculate net salary in Brazil
Understand gross versus net salary, how INSS and IRRF affect the result, and when to use a Brazilian net salary calculator.
SAC or PRICE: how to compare loan amortization
See how SAC and PRICE change installments, amortization, interest and total cost over a loan term.
Compound interest with contributions and inflation: how to read it
Understand how principal, monthly contributions, monthly rate, duration and inflation change a compound-interest simulation.
CIDR, IPv4 subnet and IPv6: what the calculator shows
Understand network address, broadcast, host range, CIDR prefix and practical differences between IPv4 and IPv6.
CPF and CNPJ in tests: generate, validate and avoid confusion
Understand the difference between mathematically valid numbers, real documents and registry lookups when using CPF/CNPJ in tests.
BMI, BMR and TDEE: how to use health calculators safely
See why BMI, BMR, TDEE, macros and daily water are useful estimates, but do not replace professional assessment.