Hey Product Hunt community! 👋 I'm excited to share **CalcHub** with you all today. Like many creators, freelancers, and indie founders, I was tired of using legacy calculator sites from 2008 that are bloated with 5+ flashing banner ads, invasive trackers, and outdated fee policies. When calculating platform fees (like Stripe cross-border cuts or TikTok Creator Rewards RPM), you just want instant, accurate math without clutter. So we built **CalcHub** from scratch: ✨ **100% In-Browser Privacy**: All math runs locally on your device — no financial numbers are sent to servers. ⚡ **Sub-Second Reactive Sliders**: Instant visual recalculation with interactive growth charts. 🧾 **Reverse Invoicing Solver**: Computes the exact amount to invoice clients so you receive 100% of your target payout after Stripe/PayPal deductions. 🌍 **7 Native Global Languages**: Full localization in EN, ES, PT, DE, FR, JA, and ZH. 🚫 **Zero Ads Bloat & No Sign-up required**. Check it out live: https://calc.puretoolhub.com I'd love to hear your feedback and suggestions on what calculators we should build next! 🚀

CalcHub

100% Free, Private Business & Creator Calculators (2026)

100% Free, Private Business & Creator Calculators (2026)