Free tools

Free online tools

Use calculators, generators, validators, and simple utilities for everyday tasks. Sign in with Google only when you want to save financial simulations.

Available tools

Choose a tool family or open a popular option directly.

Calculators

Simulate financial, labor, and asset scenarios with detailed tools.

Brazil CLT Severance Calculator

Estimate Brazilian CLT severance pay, notice, vacation, 13th salary, FGTS and deductions with a transparent calculation memo.

Rescisao Without FGTS Calculator

Estimate a Brazilian CLT rescisao without FGTS fine or immediate FGTS withdrawal, focused on resignation and dismissal for cause.

Brazil Net Salary Calculator

Estimate Brazilian CLT net salary with INSS, IRRF, dependents, alimony, manual deductions, and a 2026 calculation memory.

Brazil Salary by Days Worked Calculator

Estimate proportional Brazilian salary by paid days in the month, with divisor 30 or calendar days, optional 2026 INSS/IRRF, and calculation memory.

Brazil Hourly Salary Calculator

Calculate a gross hourly value from monthly salary, divisor 220 or weekly hours, and estimate gross pay for worked hours.

Brazil PJ Salary Calculator

Estimate what remains from a Brazilian PJ contract with Simples Nacional, factor R, pro-labore, INSS, IRRF, accounting, and monthly costs.

Brazil IRPF Income Tax Calculator

Estimate Brazilian IRPF payable or refund with annual brackets, legal deductions, simplified discount, and tax already paid.

Brazil FGTS Calculator

Estimate monthly FGTS deposits, fine base, and 40% or 20% scenarios with a transparent calculation memory.

Brazil INSS Contribution Calculator

Estimate the Brazilian employee INSS contribution with the 2026 progressive table, contribution ceiling, and band-by-band memory.

Brazil Vacation Calculator

Estimate Brazilian CLT vacation with the constitutional one-third, abono pecuniario, INSS/IRRF deductions and a transparent calculation memo.

Brazilian 13th Salary Calculator

Estimate gross and net Brazilian 13th salary, proportional avos, first installment, advances, and INSS/IRRF deductions with 2026 tables.

Brazil Seguro-Desemprego Calculator

Estimate the monthly amount, number of payments, and total for Brazilian formal-worker seguro-desemprego using the 2026 MTE table and eligibility warnings.

Loan Calculator

Simulate your loan using SAC or PRICE systems. View the complete amortization schedule with all installments.

Vehicle Financing Simulator

Simulate car or motorcycle financing payments with Price or SAC, down payment, term, monthly rate, and optional costs.

Minha Casa Minha Vida Financing Simulator

Estimate income band, nominal rate, financed amount, and SAC or Price payments for Minha Casa Minha Vida using rules checked in 2026.

Consortium Calculator

Simulate your consortium installments with annual INCC/IPCA correction.

Loan vs Consortium

Compare loan and consortium side by side. See which option leaves more money in your pocket.

Rent vs Buy

Compare whether it's better to buy a financed property or rent and invest the difference.

Online Financial Calculator

Solve n, i, PV, PMT, FV, NPV, and IRR in an educational online financial calculator with shareable links and sign guidance.

IRR Calculator

Calculate the Internal Rate of Return of a series of cash flows.

Brazil CDB Calculator

Estimate gross and net return for a fixed-rate or CDI-linked Brazilian CDB, including regressive IR, IOF and transparent assumptions.

Compound Interest

Calculate the yield of your investments with compound interest over time.

Fixed Income Comparator

Compare fixed income investments (Fixed Rate, CDI, IPCA+, Selic) net of IR/IOF taxes and inflation.

Investment Calculator

Estimate how much an investment may grow, how much to contribute monthly for a target, or how long it may take to reach it.

Generators

Create QR codes, passwords, and random numbers with simple settings.

Validators

Check documents and common inputs with public rules and instant results.

Math

Solve percentages, proportions, and common everyday calculations.

Dates

Count periods, date differences, and time intervals.

Text

Count, review, and transform text directly in the browser.

Colors

Create palettes, copy color codes, and prepare visual choices in the browser.

Developer

Format, validate, and transform technical data directly in the browser.

How our tools work

Simple, fast, and free utilities for common tasks

1

Choose a tool

Open calculators, generators, validators, math, or dates depending on what you need.

2

Enter the data

Fill only the required values and see the result immediately.

3

Share the link

Copy a URL with the tool parameters when you want to repeat or send the scenario.

Why use Calculaderia?

100% Free

The tools are free, with no paid plans or artificial limits.

Optional account

Use everything without an account; sign in only to save financial simulations to favorites.

Open source

Full transparency: see exactly how the calculations are made

Privacy

Calculations and validations run in your browser; favorites stay protected in your account.

Guides and articles

Learn essential financial concepts

Frequently Asked Questions

Are the tools really free?
Yes, 100% free. There are no paid plans or usage limits. The project is open source and community-maintained.
Are the calculators and validators accurate?
We use known formulas and public algorithms, such as CPF/CNPJ check digits and standard financial formulas. The code is open for review.
Do I need to create an account?
No. You can use the tools immediately. A Google account is only required to save financial simulations to favorites.
Can I use it on mobile?
Yes. The tools are responsive and work on mobile devices.
How do you make money?
We do not. This is a personal open source project. If you want to support it, you can make a voluntary donation on the support page.
Can I trust the results for decisions?
The tools are educational and utilitarian. For important financial, legal, or professional decisions, consult a specialist.

Transparency and trust

100% open source code on GitHub
Browser tools; account favorites
Educational and utility tool