Show HN: CD Calculator – A tool to calculate bank CD interest returns

2 lur0913 0 7/11/2025, 8:40:16 AM cd-calculator.net ↗

Hi HN,

I built CD Calculator – https://cd-calculator.net – a simple tool that helps people calculate interest returns on bank CDs (Certificates of Deposit). Most CD calculators online are either too basic, too outdated, or full of ads. I wanted to make something that's:

- Clean and fast - Easy to use - Focused on accuracy

With this tool, users can: - Enter principal, rate, and term to get instant results - Simulate compound interest monthly or annually - Copy results with one click

Advanced features are coming soon, including: - Recurring deposits - Early withdrawal penalty simulation - After-tax return estimator

It’s built with Astro, Tailwind CSS, and vanilla JavaScript. I’d love feedback on: - Usability (especially on mobile) - Feature ideas or improvements - Accuracy of the calculations

Thanks!

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Show HN: CD Calculator – A tool to calculate bank CD interest returns

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