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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.

Macaron Foot Formation Timer

This tool helps home bakers track the critical macaron foot formation phase during baking. It calculates exact timing based on oven type, macaron size, and batter consistency. Use it to avoid undercooked or overcooked shells for perfect macarons.

Machine Capacity Calculator

Helps farmers and farm managers estimate the daily work capacity of agricultural machinery. Calculates output based on machine specifications, field conditions, and operational schedules. Use it to plan planting, harvesting, and spraying activities accurately.

Business Interruption Loss Calculator

Small business owners and e-commerce sellers use this tool to estimate financial losses from unexpected operational downtime. It calculates lost revenue, fixed costs, and net interruption impact during closure periods. Use it to prepare insurance claims or adjust cash flow…

Container Volume Planner

Helps e-commerce sellers, traders, and small business owners optimize shipping container space. Calculates total volume, usable capacity, and item fit for standard and custom shipping containers. Streamlines logistics planning to reduce unnecessary shipping costs.

Panini Press Timing Calculator

This tool helps home cooks calculate the perfect panini press cooking time based on bread type, filling, and press settings. Adjust parameters to match your specific ingredients and equipment for consistent results. Get accurate timing to avoid undercooked or burnt…

Currency Converter

This currency converter helps individuals managing personal budgets, loan applicants, and savers quickly estimate exchange rates between common global currencies. It is designed for real-world personal finance scenarios including international purchases, cross-border loan repayments, and multi-currency savings planning. Sample exchange…

Website ROI Calculator

This tool helps entrepreneurs, e-commerce sellers, and small business owners estimate the return on investment for website projects. It factors in setup costs, ongoing expenses, and attributed revenue to generate clear ROI metrics. Use it to justify website budgets or…

Side Hustle Profit Calculator

Calculate net profit from your side gig after expenses, taxes, and fees. This tool helps freelancers, part-time workers, and small business owners track their side hustle earnings. Use it to plan budgets, set pricing, or assess if a side project…