Contact

Found a bug, have a calculator suggestion, or spotted a mathematical error? We want to know.

Email: contact@smallbizmath.com

We read every message and try to reply within a few business days. To help us investigate quickly, include the calculator or guide URL and a short description of what you expected to happen.

Site operator and editorial responsibility

SmallBizMath is operated and published by KaiDigital SpA, a Chilean technology company. Editorial direction: Jorge Corsi.

Good reasons to contact us

• A result does not match the displayed formula or worked example.
• An assumption, label or limitation is unclear.
• A page is difficult to use with a keyboard, screen reader or mobile device.
• You have a well-defined calculator suggestion for a small-business decision.

About the leads service

Vetted business leads are still marked Coming soon. No lead packs are currently being sold and no payment is required to use any calculator.