Contact Us / Report an Error

For general questions, feedback, suggestions, or other inquiries, you can contact us by email:

When contacting us, please include enough information for us to understand your question or request clearly.

We aim to make our calculators useful, clear, and reliable, but errors can occasionally occur. If you believe a calculator is producing an incorrect result, please report it.

Examples of issues you can report include:

• Incorrect calculation results
• Incorrect or unclear formulas
• Problems with unit conversions
• Unexpected rounding
• Missing or incorrect input options
• Results that do not update correctly
• Incorrect assumptions
• Confusing instructions
• Broken buttons or calculator controls
• Mobile or desktop display problems
• Incorrect examples or explanations
• Outdated information
• Other calculator-related problems

Providing a few details can make it easier to investigate the issue. Where possible, please include:

• Calculator name
• URL of the calculator page
• Values you entered
• Units or options you selected
• Result shown by the calculator
• Result you expected, if known
• Short explanation of why you believe the result is incorrect

You may also include any additional information that helps explain the problem. Please avoid sending sensitive personal, financial, medical, account, password, or other confidential information.

You can also contact us if something on the website is not working correctly. For example:

• A page does not load
• A calculator does not respond
• A button or link is broken
• Content is difficult to read
• A page displays incorrectly on mobile
• The language selector is not working correctly
• A page contains missing or incomplete information
• You find a broken internal link
• You encounter an accessibility issue

When reporting a technical problem, it can be helpful to mention the device and browser you were using.

Have an idea that could make one of our existing calculators more useful? We welcome practical suggestions such as:

• Additional units
• Better result explanations
• New input options
• Improved examples
• Useful calculation modes
• Accessibility improvements
• Better mobile usability
• Additional related calculations

We review suggestions based on usefulness, accuracy, feasibility, and relevance to the website.

If there is a calculator or utility you would like to see on Online Calculator Spot, you are welcome to suggest it. When making a suggestion, tell us:

• What the calculator should calculate
• Who would find it useful
• What inputs it should accept
• What results it should provide
• Any formulas, standards, or references that may be relevant

A suggestion does not guarantee that a calculator will be added, but useful ideas may help guide future improvements.

If a reported issue is confirmed, we may update the calculator logic, formula, explanation, example, validation, or related content as appropriate.

Some differences in results may not necessarily indicate an error. Results can sometimes vary because of:

• Rounding
• Decimal precision
• Different formulas or conventions
• Measurement units
• Assumptions
• Material specifications
• Regional standards
• User-entered values

Please do not include unnecessary sensitive or confidential information in your message.

Information you provide when contacting us may be used to:

• Understand your inquiry
• Investigate a reported issue
• Respond to your message
• Improve a calculator or website feature
• Prevent misuse or spam where appropriate

For more information about how information may be handled, please review our Privacy Policy.