Methodology and sources

Where our figures come from

Every Roblox figure on this site comes from Roblox's own pages, and every tax rate from the US tax office. The one exception is exchange rates, which come from a public rate service.

• Roblox's documents for creators, which state the shares, rates and rules.
• Roblox's help centre, for rules that concern players, like Roblox Plus and gift cards.
• Roblox's announcements on its developer forum, for the day a rule changed.
• Roblox's public list of Robux packs, for the packs and their US prices.
• The US tax office, for the tax rates of each country's treaty with the United States.

The full list is at the end of this page, with the date each document was last checked.

How a figure gets onto a page

Each figure is written down once, in our data, with the document it comes from, the day we checked it and how sure it is. The calculators and the text of every page use that one copy.

No page types a figure by hand. A check refuses any typed number in the text, so a page cannot say something different from its calculator.

Robux are counted in whole numbers, as Roblox counts them. Money is counted in whole cents.

What the status words mean

Each figure has one of five status words. A page shows the weaker ones beside the figure, so you know how far to trust it.

• Official: a Roblox page or the US tax office states the figure.
• Official example: the figure appears only in a worked example on a Roblox page.
• Worked out: the figure follows from Roblox's rules, but no page states it outright.
• Your number: no public figure exists, so you enter your own, such as a bank fee.
• Reported: no official page states the figure. The page marks it, and it never stands in a title or a search result.

Estimates, exchange rates and tax

Roblox sets its prices and rates in US dollars. When a page shows an amount in another money, it is an estimate, and the day of the exchange rate stands beside it.

Our exchange rates come from a public rate service: Rates By Exchange Rate API. The site is built with the rates of one day, and your browser asks for newer ones after the page loads.

A new rate is kept for half a day at most. A rate that moved by half or more since the site was built is refused, and the older one stays.

Tax is always an estimate here. Roblox has not said which column of the US tax office's table it uses, so a rate that could differ is marked.

How we keep up with Roblox

A small program regularly compares the passages our figures come from with Roblox's pages. When a passage changes, every page that quotes it shows a notice until we have checked the change.

The list of Robux packs is read from Roblox's own price list. While Roblox is testing other prices, the update is refused and the last checked list stays.

Every change to a rule is listed with its date in our data updates. The date a figure was last checked stands on every page that uses it.

Rounding

Roblox does not always say how it rounds. Where it does not, we round down to a whole Robux, like the examples Roblox gives.

The progressive share of avatar items rounds to the nearest whole number, with halves going to the even number. That is the only rounding that matches all of Roblox's own examples.

If you find a mistake

Tell us through the contact page. Please name the page, the figure and the page of Roblox that says otherwise.

We check it against Roblox's pages, correct it if we were wrong, and list the change in our data updates.