We typically respond within 24–48 hours
We read every message and respond to all genuine inquiries. We do not respond to spam or solicitation.
If a calculation seems wrong, please describe what you entered and what result you expected. We investigate all bug reports.
We're always looking to add useful calculators. Tell us what type of percentage calculation you'd like us to add.
For advertising partnerships beyond standard AdSense, please reach out via email with your proposal.
For copyright, DMCA, or other legal matters, please email us with full details and we will respond promptly.