4 tools · Finance

Online calculators and converters

Solve everyday calculations without spreadsheets or complex forms. Formulas are shown when useful, and local converters work offline.

Browse tools ↓

01Calculate percentages, discounts and VAT

02Convert units and measurements

03Check dated currency exchange rates

No accounts or friction

All finance tools

Open any utility and start working. Each card tells you whether processing is local or requires a public API.

UNITUnit converterConvert length, mass, temperature and digital storage units instantly and offline.100% local FXCurrency converterConvert amounts between currencies with Frankfurter, exchange date, swap action and copyable result.External API VATVAT calculatorCalculate VAT from prices with or without tax.100% local %Percentage calculatorCalculate percentages, changes, increases and discounts with clear formulas.100% local

Simple tools for real tasks

Calculate percentages, VAT and unit or currency conversions with clear, copyable results.

Each tool focuses on one task, with a visible primary action, useful examples and results you can copy or download. There are no unnecessary dashboards or registration flows.

Frequently asked questions

Are these tools free?

Yes. You can use them without creating an account or artificial usage limits.

Are my data or files uploaded?

Tools marked 100% local process everything in your browser. If a utility needs an external API, it is clearly identified before you open it.

Do they work on mobile and in dark mode?

Yes. The interface is mobile first, keyboard accessible and supports both light and dark modes.