Privacy Policy

The calculators send us nothing

Every calculator on this site runs in your browser. Your browser is the program you open pages with, like Chrome, Edge or Safari.

The math happens on your own device. The sizes you type stay on that device. They never travel to us, and we never see them.

There is no account and no sign in on this site. So the site holds no profile with your name, your projects or your history.

This is the core of our privacy stance. A calculator that needs no data from you should take no data from you.

What the server may log

Our hosting company keeps standard server logs, like almost every host on the web. A log entry can hold your IP address, the page you asked for, the date and time, and the kind of browser you used.

An IP address is the number your network shows to the sites you visit. Hosts use logs to keep sites running and to spot attacks.

We do not use these logs to follow a person, and we never sell log data.

Your browser also sends small facts with each request, like its name and version. The log holds those too.

Cookies on this site

A cookie is a small file that a site stores in your browser. Cookies help sites remember small things between pages.

This site sets only the cookies it needs to work. Its providers, like the ad and analytics services named below, may set their own cookies when their parts of a page run.

Your browser gives you control. You can view, clear or block cookies in your browser settings. The calculators keep working even with cookies blocked.

A cookie never holds your calculator entries, since those entries never leave your device in the first place.

Ads and Google AdSense

This site plans to show ads through Google AdSense. Ads help pay for hosting, and they never change the numbers our tools produce.

When ads run, Google and its partners may use cookies to serve ads based on your visits to this site and to other sites. That is how ad networks show ads that match your interests instead of random ones.

You hold the switch. You can opt out of personalized ads at Google ad settings. Google also explains how it uses data from sites that run its services, on its own pages.

Opting out stops the personal match. It does not stop ads in full, and it never changes a calculator result.

Ads sit in marked ad spots on the page. They never pose as tool results.

Analytics in aggregate only

If this site uses an analytics service, it uses it in aggregate form only. Aggregate means totals. We see how many people ran the gravel calculator this week, not what one person typed.

Totals tell us which tools help and which pages confuse people. That is the whole job of analytics here.

We never connect analytics totals to a name or an email address. Totals stay totals.

Messages you send us

The contact page works like a letter. When you send it, your name, your email address and your words reach us by email so we can reply.

We use those details to answer you and for nothing else. We never sell them, and we never add you to a mailing list.

Links to other sites

Some pages link out to supplier and reference sites. Those sites run their own privacy policies, and their rules may differ from ours.

We do not control those sites and we do not see what they collect. When a question matters, read their policy on their own page.

The same care applies to ads. The advertising section above covers the cookies that ad partners may set.

Children and privacy

This site serves adults who plan building and yard work. We do not aim the site at children, and we do not knowingly collect information from children.

If you believe a child sent us personal details through the contact page, tell us and we will delete the message.

Changes to this policy

We may update this policy as the site grows. New tools or new providers can change what a page needs to say.

The date at the bottom of this page always shows the current version. When a change is big, we will say so plainly at the top of this page.

How to reach us

Questions about privacy go through the contact page. We read every message and reply when a reply helps.

Last updated: November 2026.