LineCalc – Free online calculator with real-time collaboration

Summary: LineCalc is a free, line-based calculator supporting variables, currency conversion, and real-time collaboration without requiring sign-up. It is available in 10 languages.

What it does

It performs calculations using lines with variables and currency conversion while enabling multiple users to collaborate in real time.

Who it's for

Users needing an online calculator with collaborative features and multi-language support.

Why it matters

It eliminates the need for sign-up and desktop software by providing a collaborative, accessible calculator online.