Contact LabDiagram
Spotted a wrong value, a mislabeled diagram or a sheet that prints badly? Use the review form at the bottom of this page and name the figure. Email [email protected] works too: the form is anonymous, while email lets the team answer you.
What to put in the note
- The page and the figure or calculator you used.
- The value or label you think is wrong, and the reference you checked it against.
- For printing problems: your browser and paper size.

Asking for a new figure
A figure is added when it can be drawn accurately and labeled from a standard source. Choose the topic “Missing an element or feature”, describe the subject and level, and read how LabDiagram draws and checks its figures first.
What the review form keeps
The form saves the time, whether you pressed helpful or needs improvement, the page address, the topic and any note up to 1,000 characters. It does not ask for a name or an email address and does not keep your IP address with the note. The newest 300 notes are kept, and the formulas you tried are never part of a note unless you type them in.

Rights and removal
To have a note deleted or to raise a rights concern about a figure, pick “Rights or removal request”, name the page and say what should change. Notes are anonymous, so a deletion is matched to the page and time you give.
Frequently asked questions
Will I get a reply?
By email, yes, when an answer is needed. Form notes store no contact details, so they cannot be answered one by one; a fix goes live on the page and its updated date moves.
Can you help with lab safety or identify a substance?
No. Ask your instructor or a qualified chemist. LabDiagram is a study aid.
Is my email address stored?
Only if you write to us: the address is used to reply and the thread is deleted when the matter is closed. The form never asks for an email address. See the privacy policy.
Back to the LabDiagram periodic table and molar mass calculator.
Was this figure useful?
Mark it as passed, or send it back for revision with a short note.
Recorded. Thank you for the review.