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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.

Negative Equity Calculator

This negative equity calculator determines how much you owe on a financed asset above its current market value. It is designed for individuals managing personal budgets, loan applicants, and financial planners. Use it to assess your loan-to-value position for cars,…

Battleground Rating Calculator

Estimate your competitive battleground rating for video and tabletop games. This tool helps gamers, streamers, and designers track performance across matches. It factors in win rate, opponent skill, and match volume for accurate results.

Antifreeze Mix Calculator

This tool helps car owners, mechanics, and fleet managers calculate the correct antifreeze-to-water ratio for their vehicle’s cooling system. It accounts for ambient temperature and coolant type to prevent freezing or overheating damage. Use it before seasonal maintenance or coolant…

Menu Pricing Calculator

Calculate optimal menu prices for your food business, café, or restaurant. Factor in ingredient costs, labor, overhead, and target profit margins to set competitive, profitable prices. This tool helps small business owners and food entrepreneurs avoid underpricing or overpricing menu…

Ultimate Ability Cooldown Calculator

Calculate ultimate ability cooldowns for video games, tabletop games, and competitive play scenarios. Adjust for in-game modifiers, patch changes, and character-specific traits to get accurate timings. This tool helps gamers, streamers, and game designers plan ability rotations and balance checks.

MCAT Score Calculator

Estimate your MCAT total score and section breakdowns using official AAMC scoring ranges. This tool helps pre-med students, academic advisors, and parents track progress toward medical school admission goals. Input your section scores to get a detailed performance breakdown.

Fish Feeding Frequency Calculator

This tool helps home aquarium owners determine how often to feed their fish based on species, tank conditions, and fish size. It simplifies daily pet care routines for casual fish keepers and hobbyists. Adjust inputs to match your specific setup…