Contact

Email

Write to the address below. There is no contact form and no other channel.

What you can write about

These five kinds of message are the usual ones. Anything that fits none of them is fine too.

• A calculation looks wrong — the result disagrees with another source or with common sense
• A figure has gone stale — a rate or a standard changed and the page has not caught up
• A request for a new calculator or a new reference section
• Advertising and partnership enquiries
• Privacy requests — questions about the privacy policy or about your data

When you report a wrong figure

The slow part of fixing something is reproducing it. With the three things below, a report can usually be confirmed the same day.

You do not need a source. "This amount just cannot be right" is already a useful lead.

• Which page — paste the address exactly as it appears
• What you entered — the values, as you typed them
• What you expected — the figure you think is right, and where you know it from if you have a source

What we cannot help with

This site builds calculators and reference pages; it is not an advice service. The three kinds of request below cannot really be answered.

What we can do instead is point you at the page that covers your topic, if one exists, and tell you which figures that calculation rests on.

• Personal tax, legal or medical advice — we are not professionals and cannot answer
• Looking up information about a specific person — no such data is held here
• Offers to trade ad clicks or traffic

How long a reply takes

One person runs this, so a few days is normal and once in a while it stretches to a week or two. It seems better to say so plainly than to promise otherwise.

Reports that a calculation is wrong go to the front of the queue. A wrong answer is not the kind of fault you can leave standing, so once it is confirmed we fix it first and reply after.