A Calculator That Thinks Like a Developer

Variables, expressions, keyboard shortcuts, and a text-first interface. Notes Calculator feels like a code editor that does math.

Built for developers

Full keyboard navigation and shortcuts. Never touch your mouse. Cmd+N for new tab, Cmd+W to close, and more.

Assign values with `base_cost = 99`, reference them later. It feels like writing pseudocode that actually computes.

A proper dark theme that matches your IDE. Easy on the eyes during late-night coding sessions.

Mac, Windows, Linux, and Web. Use the same calculator on every OS you develop on, with synced notes.

requests_per_day = 50k
price_per_1k = 0.02
daily_cost = requests_per_day / 1000 * price_per_1k
monthly_cost = daily_cost * 30

story_points = 42
velocity = 35
sprints_needed = story_points / velocity

users = 100k
avg_data_per_user = 50
total_gb = users * avg_data_per_user / 1000

Free to use. Available on every platform.