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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.

Bill Factoring Cost Calculator

This tool helps small business owners and e-commerce sellers estimate the total cost of using bill factoring services. It calculates fees, advance amounts, and net proceeds based on your invoice details. Use it to evaluate if factoring fits your cash…

Shampoo Usage Frequency Calculator

Estimate how often you should wash your hair based on your hair type, scalp condition, and daily habits. This tool helps everyday consumers tailor their hair care routine to avoid over-washing or dryness. It’s designed for anyone managing personal grooming…

CEC Calculator

This CEC calculator helps farmers, agronomists, and farm managers determine cation exchange capacity for soil samples. It supports common soil types and testing methods used in crop production and agribusiness. Use it to optimize fertilizer application and soil health planning.

Personal Loan EMI Calculator

Estimate your monthly personal loan repayments quickly. This tool helps loan applicants and budget planners calculate EMI, total interest, and total repayment amounts. Adjust loan terms, interest rates, and processing fees to fit your financial plan.

Feed Conversion Ratio Calculator

This tool helps farmers, agronomists, and livestock managers calculate feed conversion ratios for their herds. It supports multiple livestock types and unit conversions for accurate farm planning. Use it to optimize feed efficiency and reduce input costs.

Construction Loan Calculator

Estimate monthly payments and total costs for a construction loan. This tool helps homebuilders, renovators, and financial planners budget for building projects. It accounts for draw schedules, interest-only periods, and permanent loan conversions.

Savings Goal Calculator

This tool helps individuals calculate how much to save regularly to reach a specific financial target. It’s useful for planning vacations, down payments, emergency funds, or retirement savings. Adjust inputs like interest rates and timeframes to fit your personal budgeting…