Editorial Policy
Who is responsible for this site's figures, where they come from, and how a correction moves through the site.
mgtomlcalculator.org is maintained as a single-purpose reference: one calculator, a set of conversion tables, and the density figures both depend on. There is no editorial team beyond whoever maintains the site's data and copy, and that person is responsible for every figure that appears on it — more about this site is on the About page.
Sourcing
Every density figure used anywhere on the site — in the calculator's built-in liquid modes, in the conversion tables, and in the density reference table — is checked against published constants from the International Bureau of Weights and Measures (BIPM) and the National Institute of Standards and Technology (NIST). Where a figure genuinely varies by source (density shifts with temperature, and different reference works round it differently), we state the temperature a figure is quoted at and pick the value most reference works agree on, rather than whichever number is most dramatic.
Verification
No number on this site is typed into a table by hand. Every cell in the conversion table, the density reference table and the cooking chart is computed at build time by dividing the mass shown in a row by the density printed in that column's header — which means the published table is mechanically reproducible from the density constants shown on the same page, not a separate hand-entered dataset that could quietly drift out of sync with them. The full mechanics of that check are laid out in our fact-checking policy.
Corrections
If a density figure doesn't match a current published source, or a calculation looks wrong, tell us and we'll check it against the original source before changing anything. Corrections are tracked against the figure they affect rather than silently overwritten, so a reader who checked a number last month and finds it changed this month can see why. Reach us the way described on the contact page, and once a correction is confirmed it's applied everywhere that figure appears — the tables, the calculator, and the density reference — since all three draw from the same constant rather than independent copies.
This policy governs every page on the site, including the mg to mL converter on the homepage and each of its translated versions.