Contact

Send us a bug report, suggestion, correction, or any other feedback using the form below. We read everything.

What to include

• Bug reports, which calculator, what you entered, what you expected, what you saw
• Suggestions, which calculator you'd like to see (we add new ones every week)
• Corrections, flag any formula or content error and we'll fix it within 48 hours
• Partnership / licensing, calculators can be embedded on other sites under license