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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.

Hops Utilization Calculator

This tool helps home brewers estimate hops utilization, bitterness, and alpha acid extraction for beer recipes. It adjusts for boil time, hop form, and wort gravity to deliver accurate, real-world results. Use it to tweak recipes and get consistent batches…

Gift Tax Calculator

Estimate federal gift tax liability for transfers made in the current tax year. This tool helps individuals, estate planners, and donors track taxable gifts against lifetime exemptions. Quickly check if a gift requires filing a gift tax return or incurs…

Smoking Time Calculator

Estimate how long it takes to smoke different cuts of meat at home. Perfect for backyard barbecue enthusiasts and home cooks planning weekend meals. Get accurate timing based on weight, meat type, and smoker temperature.

Imputed Income Tax Calculator

Estimate the tax owed on imputed income from non-cash benefits like company cars, health insurance, or stock options. This tool helps individuals, loan applicants, and financial planners calculate accurate tax liabilities for personal budgeting. Use it to plan ahead for…

CPC Calculator

Calculate cost per click for your digital ad campaigns in seconds. This tool helps e-commerce sellers, small business owners, and marketing teams track ad spend efficiency. Use it to optimize your paid advertising budget and improve campaign ROI.

Dungeon Key Cost Calculator

Calculate the total cost of dungeon keys for video game raids, tabletop campaigns, and competitive gaming sessions. This tool helps gamers, game designers, and streamers budget in-game currency or real-world funds for key-based content. Quickly adjust variables to match your…