About this site

Grading Calculator Online does one thing: grade arithmetic, done carefully, with the formula shown.

No sign-up. No upload. Nothing you type is stored. Your numbers stay in your browser.

Who publishes this

This site is published by beFortunate, a company based in the Netherlands that specialises in online tools and SaaS.

We are not a school, an exam board, or an accrediting body, and we have no connection to any institution whose grading policy we cite. Nothing here is an official grade. Only your school issues those.

Write to us at [email protected] — see contact.

Why we built it

Grade arithmetic is simple and easy to get wrong, usually at a boundary where it matters most.

Most calculators give you a number and stop. You cannot see which formula ran, whether it rounded before picking a letter, or what it assumed about the work you have not done yet. When the answer disagrees with your gradebook — and it often does — there is nothing to check.

So this site shows its working. Every mode prints its formula under the result. How this calculator works sets out all four formulas, the input limits and the exact rounding rule. The guides use real numbers you can retype yourself.

How the arithmetic is checked

• The calculation code is covered by an automated test suite, including the boundary cases and the inputs that should be refused. It is run before each release.
• Before release, the whole interface is driven in a real browser at desktop and phone sizes, checking the four modes, custom scales, invalid input, print output, and that the calculator itself sends nothing anywhere — the test records every request the page makes and allows exactly one, Google's advertising script.
• Every number in every article is produced by this calculator, not worked out by hand. When we publish "85.85%", that string was read off the result panel. Each article ends with a Sources and checks section listing the inputs, the result on screen, the date and the screen sizes, so you can repeat the check.

If you find a number here that the calculator does not reproduce, that is a reportable error. Tell us and we will fix it.

How the content is made

You should be able to tell who made what you are reading, and how. Google's own guidance on helpful content asks publishers to be clear about who created the content, how it was created, and why (Creating helpful, reliable, people-first content). So:

• Each article answers one question we expect a real visitor to arrive with. The question is stated at the top.
• Building online tools is what beFortunate does. The calculator comes first and the writing exists to explain it, so whoever writes about a mode has that mode open in front of them while they write.
• Every figure is verified against the live calculator, and every external fact against a primary source, before anything is published.
• Every article is read and signed off by a reviewer who did not draft it. Nothing publishes on the author's own approval.
• Where a fact depends on policy rather than arithmetic — rounding rules, dropped scores, extra credit, letter thresholds — we say that it varies by school and point you at the document that governs it. We do not invent a standard, because there is not one.
• If we could not verify something, it is not on the site.

What this site does not do

• It does not give academic, legal or financial advice.
• It does not predict your grade. It calculates the arithmetic you ask it to.
• It does not store, transmit or sell your grades. There is nowhere for them to go — the calculations run in your browser.
• It does not accept paid placement or sponsored articles, and nothing here is recommended because someone paid us to recommend it. If we ever earn a commission on something we link to, the link will say so.

See the disclaimer for the limits, and terms for the rules of use.

How the site pays for itself

Plainly: advertising.

We use Google AdSense. Ads go in two fixed positions — below the result and below the explanation — chosen to stay clear of the controls you came to use.

As of 16 October 2026 the AdSense code is loaded on every page, but no ad is showing yet, because Google has not finished reviewing the site. We did not wait for the first ad to say so: the code that can set cookies and that receives your IP address is already there, so the cookie notice and the privacy statement already describe it in full, including how to refuse.

Google's own consent message comes with it. In the European Economic Area, the United Kingdom and Switzerland it asks you before personalised advertising data is used, and the Cookie settings button at the bottom of every page reopens that choice. We added no other advertising company and no analytics product.

The calculator stays free, it needs no cookie, and advertising never affects what the formulas do.

Corrections

We would rather be corrected than consistent. If a number, a formula or a cited policy is wrong, write to [email protected]. Include the mode you used and the values you entered and we can reproduce it immediately.

Sources

• Arithmetic, formulas and rounding: this site's own calculator and test suite. Verified 16 October 2026.
• Letter-grade thresholds differ by institution: SUNY Broome Community College policy AA4010 (A = 93–100) and the Lincoln Memorial University PA program catalog (A = 90.00–100%). Both checked 16 October 2026.
• Guidance on stating who created the content, how and why: Google Search Central, Creating helpful, reliable, people-first content. Checked 16 October 2026.
• AdSense code loaded, no ad unit live, Google's consent message in use: public/assets/integrations.json (adsense.enabled: true, publisher ca-pub-0745848274612756, adsense.adUnitsLive: false, consent.provider: google-funding-choices) and the AdSense tag in the <head> of every generated page. Verified 16 October 2026. Cookies and consent in detail: cookie notice.
• Exactly one external request, and none from the calculator: this site's release browser test, which records every request the page makes. Verified 16 October 2026.