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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.

Loyalty Points Redemption Rate Calculator

This tool helps e-commerce sellers and small business owners calculate loyalty point redemption rates. It factors in profit margins, point valuation, and customer activity to balance rewards and profitability. Use it to set fair redemption tiers that drive repeat purchases…

Retail Price Calculator

Calculate optimal retail prices for your products by factoring in costs, margins, and taxes. This tool helps small business owners, e-commerce sellers, and traders set profitable, competitive pricing. Use it to align pricing with your business goals and market standards.

Rack Rate vs Negotiated Rate Calculator

Compare standard rack rates to negotiated pricing for your business transactions. This tool helps entrepreneurs, traders, and e-commerce sellers evaluate cost savings from bulk or partnership discounts. Quickly assess how negotiated rates impact your bottom line.

Farm Loan Repayment Calculator

This tool helps farmers, agronomists, and rural entrepreneurs estimate repayment costs for agricultural loans. It accounts for farm-specific terms like grace periods, seasonal payment frequencies, and common agribusiness loan structures. Use it to align loan payments with planting, harvest, and…

Net Revenue per Employee Calculator

Calculate net revenue per employee to assess workforce efficiency for your business, trade operation, or e-commerce store. This metric helps small business owners and entrepreneurs benchmark productivity against industry standards. Use it to inform staffing decisions and operational adjustments.

Z-Score Calculator

Calculate z-scores to compare individual academic performance against a group average. This tool helps students, teachers, and academic advisors assess how a score relates to a dataset. It’s useful for grading analysis, standardized test evaluation, and student progress tracking.

Urban Green Space Cooling Effect Calculator

Estimate temperature reduction from urban green spaces for sustainability planning, research, or community advocacy. This tool helps eco-conscious individuals and professionals quantify cooling benefits of parks, tree canopies, and green roofs. It uses standard environmental models to deliver actionable data…

Cost of Capital Calculator

Estimate the weighted average cost of capital for personal loans, savings portfolios, or small business financing. This tool helps individuals, loan applicants, and financial planners assess the true cost of borrowed or invested funds. Use it to compare financing options…