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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.

Orchid Watering Frequency Calculator

This tool helps home gardeners and plant owners determine how often to water their orchids. It factors in orchid type, potting conditions, and environment to create a personalized schedule. Avoid overwatering or underwatering with this simple calculator.

Ex Works Pricing Calculator

Calculate Ex Works (EXW) pricing for your traded goods quickly. This tool helps entrepreneurs, traders, and e-commerce sellers set accurate ex-factory prices. It factors in production costs, overhead, and target margins for global trade deals.

Income Protection Insurance Calculator

This tool helps individuals estimate monthly income protection insurance payouts and premiums based on current earnings and coverage needs. It’s designed for personal budget planners, loan applicants, and financial advisors managing risk. Use it to align coverage with your monthly…

HELOC Payment Calculator

Estimate your HELOC monthly payments, total interest, and repayment timeline in seconds. This tool helps homeowners, loan applicants, and financial planners model different borrowing scenarios. Adjust rates, draw periods, and repayment terms to fit your budget.

Gelatin Blooming Ratio Calculator

This tool calculates the correct gelatin-to-water ratio for blooming, perfect for home cooks making desserts, jellies, or gummies. It accounts for gelatin type and desired firmness to prevent clumpy or weak results. Use it to get consistent textures every time…

Private Label Margin Calculator

Calculate your private label product margins to set profitable pricing for e-commerce or wholesale sales. This tool helps entrepreneurs, small business owners, and traders assess profitability across different sales channels. Use it to adjust costs, pricing, and volume to hit…