CalcHub
100% Free, Private Business & Creator Calculators (2026)
What it does
CalcHub is a modern suite of interactive financial and unit-economic calculators designed for creators, Shopify sellers, freelancers, and SaaS founders. 100% client-side execution, zero pop-up ads, reverse invoicing solvers, and 7 native global languages.
Accurate, fast, and 100% in-browser financial and business calculators for Stripe fees, TikTok creator rewards, YouTube revenue, SaaS MRR, and Shopify margins.
100% free, interactive calculators engineered for creators, e-commerce sellers, SaaS founders, and freelancers. No ads bloat, no forced sign-ups, sub-second execution. Calculate earnings, RPM, and brand deal rates for YouTube, TikTok & Substack. Estimate your earnings from the TikTok Creator Rewards Program based on qualified views and RPM. Estimate YouTube AdSense revenue for Long-form Videos and Shorts by views, niche, and audience geography. Accurate transaction fee and profit margin calculators with real ad costs. Calculate exact Stripe, PayPal, and credit card processing fees for domestic and international sales. Calculate true e-commerce net profit margins factoring in product COGS,…from calc.puretoolhub.com
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Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…
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