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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.

Shelf Life Extension Estimator

Estimate how long common food items stay fresh with different storage methods. This tool helps home cooks and household managers plan grocery trips and reduce food waste. Get tailored shelf life estimates based on item type, storage conditions, and packaging.

Embodied Carbon in Construction Calculator

Estimate the embodied carbon of construction materials for your building project. This tool helps sustainability professionals, architects, and eco-conscious builders track upfront emissions. Use it to compare material choices and reduce the environmental impact of new builds or renovations.

Variable Annuity Fee Calculator

Estimate total fees and net returns for variable annuity investments. This tool helps savers, financial planners, and retirement savers compare fee structures across different annuity products. Use it to understand how annual fees impact long-term growth.

Tea Steeping Timer

Brew the perfect cup of tea every time with this simple timer. It helps home cooks and tea drinkers adjust steep times based on tea type and serving size. No more bitter over-steeped or weak under-steeped tea.

CFR Freight Calculator

This CFR Freight Calculator helps e-commerce sellers, traders, and small business owners estimate Cost and Freight expenses for international sea shipments. It accounts for product value, carrier fees, and port charges to support accurate pricing and margin planning. Use it…

Banquet Seating Arrangement Calculator

This tool helps event planners, venue managers, and small business owners calculate optimal seating layouts for banquets, trade shows, and corporate events. It factors in room dimensions, table types, and guest count to avoid overcrowding or wasted space. Use it…