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Found an error? Have a suggestion for a new calculator? We would love to hear from you.

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We typically respond within 24 hours on business days.

If a result seems wrong, tell us the calculator name, your inputs, the result you got, and what you expected. We investigate every report.

Have an idea for a calculator we do not offer yet? Let us know and we will consider adding it.

If you notice a rate or threshold that has changed and we have not updated yet, please let us know with a link to the official source.

calk-ca.com is based in Canada. All inquiries are handled in English.