Convert&Calculate Everything

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Contact.

Questions, corrections or feedback? We would like to hear from you.

How to reach us

Email us at contact@convertcalculateeverything.com. Corrections to a formula, a unit definition or a data table are especially welcome; please include the page address and the numbers you entered.

Before you rely on a result

We aim for accuracy, but always verify financial information, exchange rates, taxes, and other consequential calculations with an appropriate professional or provider.

Answers to common questions

Most questions can be answered on the tool pages themselves. Each page shows the formula it uses, a worked example and a set of frequently asked questions. A few of the most common:

My result looks wrong: check that both units are the ones you meant (for example US vs imperial gallons, or mpg vs L/100 km) and that a decimal comma has not been typed as a thousands separator. Every result can be checked by hand with the formula shown under the tool.

The exchange rate differs from my bank: the converter shows a market reference rate from Coinbase with its timestamp. Banks and card networks add a margin and fees, so the amount you receive will usually be lower.

A saved favorite disappeared: favorites and recent calculations are stored only in your browser, so clearing site data or using a private window removes them.

Checking a result yourself

Every tool page lists the formula it uses and a worked example, so you can repeat any calculation with a phone calculator. For unit conversions, the conversion tables on each page show the same factors the tool uses; for loans and savings, the payment tables show values per 10,000 or 100,000 so you can scale them to your own amount.

Corrections policy

If a formula, unit definition or data table is found to be wrong, it is corrected and the page is updated. Reference data pages state the dataset and date they use, so you can always verify a figure against the original source.

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