DimeCalc: Free finance calculators that never see your numbers

DimeCalc is a set of free personal-finance calculators that run entirely in your browser. Most calculator sites route what you type — your salary, debts, rent — through their servers and then monetize it. DimeCalc is a static site: the math happens locally in your tab. Turn off your internet after the page loads and every calculator keeps working. Nothing you enter is uploaded, stored, or tracked. No sign-up, no accounts, no paywall, and no ads. Completely free.

Hi Product Hunt 👋

I built DimeCalc after getting tired of "free" calculators that quietly monetize the numbers you type into them. Your salary and debt are some of the most sensitive data you own — they shouldn't need to leave your browser to do simple math.

So DimeCalc is a static site: every calculation runs locally in the tab. Open DevTools and watch — no network calls when you calculate. Turn off wifi mid-session and it still works.

Every tool shows its formula and cites its 2026 sources (IRS, SSA, CMS). The code is public on GitHub — if I got a rate wrong, open an issue and I'll fix it with the correction dated.

No signup, no ads, no paywall. Would love to hear which calculators would actually be useful for you — what should I build next?

Hi Product Hunt 👋

I built DimeCalc after getting tired of "free" calculators that quietly monetize the numbers you type into them. Your salary and debt are some of the most sensitive data you own — they shouldn't need to leave your browser to do simple math.

So DimeCalc is a static site: every calculation runs locally in the tab. Open DevTools and watch — no network calls when you calculate. Turn off wifi mid-session and it still works.

Every tool shows its formula and cites its 2026 sources (IRS, SSA, CMS). The code is public on GitHub — if I got a rate wrong, open an issue and I'll fix it with the correction dated.

No signup, no ads, no paywall. Would love to hear which calculators would actually be useful for you — what should I build next?