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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.

Content Syndication Cost Calculator

This tool helps entrepreneurs, e-commerce sellers, and marketing teams estimate total costs for content syndication campaigns. It factors in platform fees, content production, and distribution expenses to support budget planning. Use it to align syndication spend with your business’s marketing…

Store Traffic Conversion Calculator

This tool helps small business owners, e-commerce sellers, and retail managers calculate store traffic conversion rates and related sales metrics. It uses real-world foot traffic and transaction data to deliver actionable insights for optimizing sales performance. Use it to identify…

Color Mixing Ratio Calculator

Mix paint, icing, or craft dyes with precision using this tool. It helps home cooks, DIYers, and hobbyists calculate exact color ratios for consistent results. Avoid wasted materials by getting the right blend every time.

In-Store vs Online Margin Comparison Calculator

Compare profit margins between in-store and online sales channels to optimize your pricing strategy. This tool helps e-commerce sellers, small business owners, and traders evaluate channel-specific costs and revenue. Use it to identify which sales channel delivers higher net margins…

Gestation Calculator for Pigs

This tool helps pig farmers and livestock managers estimate farrowing dates for sows. It calculates key gestation milestones based on breeding date and breed-specific gestation lengths. Use it to plan farrowing schedules, feed adjustments, and facility preparations.

Savings Calculator

This savings calculator helps you estimate how much you can set aside from daily expenses. It’s designed for home cooks, renters, and anyone managing personal budgets. Use it to plan small, consistent savings for household goals.

Auto Refinance Savings Calculator

Estimate how much you can save by refinancing your auto loan. Compare your current loan terms with potential new rates and terms. Ideal for car owners looking to lower monthly payments or reduce total interest costs.

Wine Pour Calculator

Calculate how many glasses of wine you can pour from a bottle or larger container. Perfect for home hosts, dinner party planners, and anyone managing beverage servings. Get accurate pour estimates based on your preferred glass size and container volume.

Dietary Carbon Footprint Comparison

Compare the carbon emissions of different dietary patterns to make informed sustainable food choices. This tool helps eco-conscious individuals, sustainability researchers, and policy advocates estimate the environmental impact of daily meal plans. Use it to evaluate how adjusting protein sources…