Contact

Do you have a question, a suggestion or have you spotted an error in one of our calculators? We'd love to hear from you.

You can reach Online Calculators by email at gsguille992@gmail.com. We read every message and try to reply as soon as possible.

Please use this address for:

• Suggestions for new calculators or improvements.
• Reporting an error or an out-of-date figure.
• Privacy or data-protection enquiries.
• Advertising or general questions.