Launching FluxCalc — 13 Free Tools for Finance, Dev & Everyday Math

Today we're excited to launch FluxCalc, a collection of free online calculators and developer tools designed with one principle: tools should just work.

No sign-up forms. No email gates. No "free trial" limitations. You open the page, use the tool, and get your answer. Every calculation runs locally in your browser — your data never touches our servers.

What's Available at Launch

We're starting with 13 tools across four categories:

• Finance — Tax Calculator 2026, Tip Calculator, Percentage Calculator
• Developer — Token Counter, Unix Timestamp Converter, CSV to JSON, Markdown to HTML
• Design — Aspect Ratio Calculator, HEX to RGB Converter
• Utility — Age Calculator, Days Between Dates, Character Counter, Roman Numeral Converter

What's Next

We're adding new tools every week based on search demand and user requests. Coming soon: BMI calculator, compound interest calculator, JSON formatter, and more.

Have a tool you'd like to see? Email us at hello@fluxcalc.com.