About Kalberry

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What is Kalberry?

Kalberry is a free collection of online finance and business calculator tools, organized by country. We provide calculators for Thailand, the United States, and universal tools that work regardless of location. Our tools cover taxes, loans, investments, labor law, retirement planning, and everyday business calculations.

Whether you need to estimate your Thai personal income tax, calculate US mortgage payments, or figure out compound interest on your savings, Kalberry has a purpose-built tool for you — completely free, no signup required.

Our Team

Kalberry is built and maintained by a team of software developers and finance researchers based in Thailand, with expertise spanning Thai tax law, US personal finance, and financial software development. We founded Kalberry in 2025 with one goal: make accurate financial calculations free and accessible to everyone.

Finance & Tax Research

Our tax data is cross-referenced against the Revenue Department of Thailand, the IRS, and official state tax agencies before publication. All tax brackets are updated within 30 days of official announcements.

Software & Accuracy

Calculators are built with TypeScript and run entirely client-side. All formulas are peer-reviewed against official documentation and tested against real-world examples before launch.

Questions or errors? Contact us at contact@kalberry.com — we typically respond within 48 hours.

Data Sources & Accuracy

We take accuracy seriously. Every calculator uses official rates, brackets, and formulas sourced directly from government and authoritative sources:

Thai Income Tax

Progressive brackets from the Revenue Department of Thailand for tax year 2026 (BE 2569)

Thai Labor Law

Severance pay and overtime rates from the Department of Labour Protection and Welfare, Labor Protection Act B.E. 2541 and amendments

Thai Social Security

Contribution rates from the Social Security Office (SSO) for 2026

US Federal & State Tax

IRS published tax brackets and standard deductions from irs.gov; state rates from official state revenue departments

Financial Formulas

Standard financial mathematics for compound interest, loan amortization, ROI, and other universal calculations — per CFA Institute and standard actuarial standards

Disclaimer: Our calculators provide estimates for planning purposes only. Tax laws are complex and change frequently. For final tax filings or major financial decisions, please consult a qualified CPA, tax advisor, or financial planner licensed in your jurisdiction.

Privacy by Design

All Kalberry calculators run entirely in your web browser using client-side JavaScript:

  • No data collection

    The numbers you enter never leave your device. We have no servers that process or store your financial data.

  • No signup required

    Just open a calculator and start using it — no accounts, no email, no personal information needed.

  • Instant results

    Calculations happen locally, so results appear immediately without waiting for server responses.

  • Works offline

    Once the page loads, calculators continue to work even if your internet connection drops.

Our Tools

Kalberry currently offers 29 free calculators across three categories:

Thailand (8 tools)

Income tax, home loan, car loan, social security, severance pay, overtime, provident fund, retirement

Browse Thailand tools →

United States (6 tools)

Mortgage, credit card payoff, loan comparison, take-home pay, retirement planner, freelancer rate

Browse US tools →

Universal (15 tools)

Compound interest, ROI, profit margin, invoice generator, QR codes, password generator, and more

Browse universal tools →

Contact Us

Found an error in a calculation, want to suggest a new tool, or have a partnership inquiry? We'd love to hear from you.

contact@kalberry.com