Privacy Policy

All calculations run in your browser. We never see the numbers you type into any calculator. Your favorites, history, and inputs are stored on your device via localStorage and IndexedDB, never transmitted to our servers.

We use Vercel Analytics and Vercel Speed Insights to measure anonymous traffic (pages visited, approximate country, device, Core Web Vitals). Both are cookie-less.

We display advertising served by Google AdSense. Ads are gated by consent: visitors from the EEA, UK, and Brazil see a consent banner powered by Google Funding Choices before any advertising or analytics cookie is set. Refusing consent still shows ads, but only contextual (based on page content), not personalized.

We do not sell, rent, or share personal data with anyone outside our listed processors (Vercel, Google, Cloudflare).

QuickUse Calculator is operated by the publisher identified on the Contact page. Our registered location for LGPD/GDPR correspondence is Porto Alegre, Rio Grande do Sul, Brazil.

For any privacy-related request — access, correction, deletion, portability, objection, consent withdrawal — email contact-us@quickusecalculator.com with the subject "Privacy request". We answer within 15 business days for LGPD requests and 30 days for GDPR requests, in line with the applicable statutory deadlines.

Anonymous traffic analytics via Vercel Analytics and Vercel Speed Insights: URL visited, referring site, approximate country (derived from your IP then discarded), device and browser class, Core Web Vitals (LCP, INP, CLS). No cookies, no fingerprinting, no identifier linked to you.

Error reports: if the site crashes in your browser, the error message and stack trace may be logged so we can fix the bug. We strip personal data from these reports before storage.

Consent signals: when you interact with the cookie banner (accept, reject, customize), your choice is stored locally so we do not ask again on every page. This record lives on your device and in the Google Funding Choices framework; it is not linked to your identity.

Advertising and measurement data collected by Google when you consent (see section below).

We do not collect names, email addresses, phone numbers, or any personally identifying information, unless you voluntarily send us an email.

We do not observe the inputs you type into any calculator. The math runs locally.

We do not track you across third-party websites using our own infrastructure.

This site is a Google AdSense publisher. Google and its advertising partners may use cookies, web beacons, and similar technologies to serve ads based on your visits to this and other sites. Specifically, Google uses the DoubleClick DART cookie (and other advertising cookies) to serve ads based on the content you view on QuickUse Calculator and elsewhere.

Ads are served under one of two regimes depending on your consent:

Personalized ads — shown when you have granted consent via the banner. Google may use information it collects across its ad network to pick ads likely to interest you.

Contextual (non-personalized) ads — shown to visitors who refused consent or who are in regions where Google defaults to contextual-only behavior. These ads are chosen from page content, not from a profile.

Third-party vendors listed by Google in its real-time bidding program may participate when you grant consent. The full, auto-updated list is available at https://support.google.com/admanager/answer/9012903.

To opt out of personalized advertising across Google services: https://www.google.com/settings/ads. To opt out of personalized advertising from participating third-party vendors: https://optout.networkadvertising.org and https://optout.aboutads.info. These opt-outs operate independently of our cookie banner and apply across the web, not just to this site.

We use Google Funding Choices as our consent management platform (CMP). It is a Google-certified CMP compliant with the IAB TCF v2.2 framework and specifically designed for AdSense publishers.

We implement Google Consent Mode v2. That means every visitor is treated as non-consented by default: any advertising or analytics cookie that would otherwise be set is blocked at the script level until you interact with the banner. "Accept" widens the signal to allow personalized content; "Reject" or closing the banner keeps non-essential cookies blocked.

You can change your choice at any time. The footer carries a "Manage cookie preferences" link that re-opens the Funding Choices banner. A more detailed breakdown of every cookie category we set (strictly necessary, preferences, analytics, advertising) lives on our dedicated Cookies page.

Favorites: calculators you marked with a heart, stored via localStorage. Only visible on the device where you saved them.

History: a recent-calculations log stored in IndexedDB via Dexie. Never leaves your device. Clearing your browser site data removes it.

Theme preference (light/dark) and locale choice: stored in localStorage.

Consent state: stored by Funding Choices to avoid re-prompting on every visit.

Hosting and edge network: Vercel, Inc. (United States). Privacy: https://vercel.com/legal/privacy-policy.

DNS and CDN: Cloudflare, Inc. (United States). Privacy: https://www.cloudflare.com/privacypolicy/.

Advertising and CMP: Google LLC (United States). Privacy: https://policies.google.com/privacy. Ad settings: https://www.google.com/settings/ads.

Fonts: Google Fonts (Inter, JetBrains Mono), self-hosted at build time so your browser does not contact Google.

Transfers of personal data to the United States rely on the EU-U.S. Data Privacy Framework and on standard contractual clauses where applicable. LGPD international transfers are covered by adequacy or by the recipient’s privacy framework as published on our processors’ pages.

Under the GDPR (EU) and the LGPD (Brazil), you have the right to know what we process about you, request a copy, request correction or deletion, object to processing, request portability, and withdraw consent at any time.

Because we collect only anonymous traffic analytics and consent signals, there is usually nothing linked to your identity on our side to export or delete. To clear data stored on your own device, open your browser settings and clear site data for quickusecalculator.com.

Legal basis under the GDPR for non-essential cookies and personalized advertising: your consent (Article 6(1)(a)). Legal basis under the LGPD: your consent (Article 7(I)) for personalized advertising; legitimate interest (Article 7(IX)) for anonymous aggregated analytics and fraud prevention.

To exercise any right, email contact-us@quickusecalculator.com with the subject "Privacy request". You also have the right to lodge a complaint with your local supervisory authority: the ANPD in Brazil (https://www.gov.br/anpd/), your national DPA in the EU, or the ICO in the UK (https://ico.org.uk/).

This site is not directed at children under 13 and we do not knowingly collect data from them. Advertising served by Google on this site is subject to Google’s own policies that restrict personalized ads to viewers under the applicable age. If you believe a child has sent us personal information (for example by emailing us), contact us and we will delete it.

If we change how we collect or use data, we update this page and change the "Last updated" date at the top. Material changes will be announced on the home page for at least 30 days before taking effect.

Contact (general and privacy/data-protection requests): contact-us@quickusecalculator.com — please use the subject "Privacy request" for LGPD/GDPR matters so we can route them with priority.

We aim to reply within a few business days, and within the statutory deadlines for privacy requests (15 business days under the LGPD, 30 days under the GDPR).