Contact

Found a bug, want to suggest a new calculator, or have a question about how a result is calculated? We read every message.

When reporting a calculation issue, please include the exact inputs you used and the result you expected — that makes it much faster to reproduce and fix.

Who you are writing to

CalcMate is built and maintained by Digimate (數伴有限公司 (Digimate Co., Ltd.)), a web design and CRM consultancy in Taichung, Taiwan. Messages go to Chen Chien-Yu (Fish Chen), who maintains the site — not to a ticket queue.

Replies usually come within a few business days. Corrections to a formula or a stated threshold get priority over everything else; if you can point at the source you believe is right, even better. More about how the tools are built and checked is on the about page.