Launch Hub author portrait

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.

Tree Height Calculator

Estimate tree height quickly using basic field measurements. This tool helps farmers, agronomists, and orchard managers plan planting, pruning, and harvest operations. It works for both small farm woodlots and commercial crop orchards.

User Acquisition Cost Calculator

Calculate how much you spend to gain each new customer for your business, e-commerce store, or trade operation. This tool helps entrepreneurs, marketing teams, and small business owners track acquisition efficiency. Use it to align spending with revenue goals and…

Starter Pack Value Calculator

Calculate the total value of video game starter packs to decide if they’re worth your money. This tool helps gamers, streamers, and competitive players compare in-game item bundles across different titles. It factors in base game access, exclusive cosmetics, and…

Butter Conversion Calculator

This tool helps home cooks and bakers quickly convert butter measurements between common units. It is useful for adjusting recipes, substituting ingredients, or scaling batch sizes for everyday cooking and baking.

Pro Rata Salary Calculator

This tool calculates pro rata salary for part-time, contract, or mid-month hires. It helps individuals managing personal budgets, loan applicants, and financial planners estimate take-home pay accurately. Use it to align salary expectations with actual work periods.

Meta Tag Length Calculator

This tool calculates the character length of meta title and description tags for web pages. It helps e-commerce sellers, marketers, and small business owners optimize content for search engine display. Avoid truncated snippets by checking tag lengths against platform guidelines.

Mortgage Origination Fee Calculator

Estimate the upfront origination fees for your mortgage loan. This tool helps homebuyers, loan applicants, and financial planners budget for closing costs. It calculates total fees based on loan amount, fee structure, and optional discount points.