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Evan Miller

I'm a software engineer who builds web applications and data tools. I personally implement and verify the formula and logic behind every calculator on Launch Hub. I publish them as free online tools so anyone can get an answer without signing up or paying.

Pixel to EM/REM Converter

This tool converts pixel values to EM and REM units for web design projects. E-commerce sellers and small business owners can use it to ensure consistent styling across their online storefronts and marketing assets. It simplifies responsive design adjustments for…

Buy Now Pay Later True Cost Calculator

Estimate the total cost of Buy Now Pay Later (BNPL) plans before committing. This tool helps individuals managing personal budgets, loan applicants, and financial planners compare BNPL offers. It accounts for fees, interest, and payment terms to show the true…

Owner’s Equity Calculator

Calculate your personal owner’s equity to understand your net worth tied to owned assets like homes, savings, and investments. This tool helps individuals, loan applicants, and financial planners assess their financial position quickly and accurately. Use it to track equity…

Dividend Tax Calculator

Estimate the federal tax you owe on dividend income from stocks, mutual funds, and other investments. This tool helps personal budgeters, savers, and financial planners account for dividend taxes in their annual planning. It supports 2023 and 2024 IRS tax…

System of Equations Solver

Solve systems of linear equations quickly for math homework, class assignments, or exam prep. This tool supports 2-variable and 3-variable systems with step-by-step solution breakdowns. It’s designed for students, teachers, and tutors working through algebra coursework.

Bounce Rate Calculator

Calculate your website’s bounce rate to measure user engagement and site performance. This tool helps e-commerce sellers, marketers, and small business owners track visitor behavior. Use it to identify issues with landing pages or content that may be driving users…

Dental Floss Usage Calculator

Estimate how much dental floss you need for daily oral care routines. This tool helps individuals plan monthly or yearly floss purchases based on personal usage habits. It accounts for different floss types and flossing frequency to give accurate supply…

Fusion Material Calculator

This tool helps gamers and game designers calculate exact materials needed for item fusions in RPGs, gachagames, and tabletop systems. It accounts for base requirements, success rates, and bonus material modifiers. Plan your in-game crafting efficiently without wasting rare resources.