Calculate
Without
Switching.
A transparent, scientific calculator that floats above your work.
Connect spreadsheets, documents, and logic without losing context.
macOS • Transparent overlay • Scientific mode
Engineered for Flow
Ghost Mode
Make the calculator semi-transparent to see the data underneath. Click through it when you need to interact with the window below.
Scientific Power
Switch instantly between standard layout and full scientific functions (trig, log, exp) without resizing the window heavily.
History Tape
Never lose your train of thought. Scroll back to see every calculation and result in the current session.
Unit Converter
Built-in conversion for currency, length, mass, and more. No need to open a browser.
Themes
Matches your OS appearance (Light/Dark) or choose from our custom high-contrast themes.
Why use an Overlay Calculator?
Accounting & Finance
Verify numbers in a PDF against an Excel sheet without constantly minimizing and maximizing windows.
Engineering & Design
Calculate aspect ratios, pixel conversions, or unit loads while looking directly at your CAD or Figma canvas.
Students & Researchers
Work through problems in digital textbooks with the calculator floating right next to the question.
Ready to calculate faster?
Open install details for the calculator overlay built to stay visible beside your documents, spreadsheets, and research on macOS.
View Install OptionsFrequently Asked Questions
Designed for speed and accuracy.