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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.

Tomato Sauce Reduction Calculator

This tool helps home cooks calculate adjustments for tomato sauce reduction when cooking. It provides final volume, cook time, and seasoning guidance based on your starting amount and target consistency. Use it to avoid over-reducing sauce or misjudging flavor concentration…

Business Cash Flow Calculator

This tool calculates net cash flow for small businesses, side ventures, and personal budgeting. It helps financial planners, freelancers, and loan applicants track incoming and outgoing funds. Use it to assess liquidity and plan short-term financial decisions.

Interest Only Loan Calculator

Estimate monthly interest-only payments for personal loans, mortgages, or business financing. This tool helps loan applicants, budget planners, and savers understand short-term borrowing costs. Use it to compare loan terms before committing to a repayment plan.

Payback Period Calculator

Calculate how long it will take to recover the cost of an investment or loan using this payback period calculator. It helps individuals, savers, and financial planners assess the viability of personal financial decisions. Use it to evaluate everything from…

Hand Cream Dilution Calculator

This tool helps home crafters and DIY skincare enthusiasts calculate exact ingredient ratios for hand cream dilution. Adjust concentrations to match your skin type or preferred texture without trial and error. It works for both small batch home use and…

Xylitol to Sugar Substitution Calculator

This tool helps home cooks convert white sugar measurements to xylitol equivalents for baking and cooking. It accounts for sweetness differences and density variations between the two sweeteners. Use it to get accurate substitution ratios without trial and error.