Font Size Scale Calculator
Compute a modular typographic scale from a base size and ratio. Enter your values, click Calculate, and get the full result with its breakdown — everything is processed on your device, nothing is sent to a server.
All calculations run in your browser. Your data is never sent to our servers.
Example
Example Input
base 16, ratio 1.25, step 3
Example Output
31.25px (1.953rem)
How to Use
- 1Fill in each input field with the values you want to compute.
- 2If there are choices (units, mode, operation), pick what you need.
- 3Click the Calculate button (or press Ctrl+Enter).
- 4The main result and its breakdown appear in the Result area. Click Copy to copy it.
About the Font Size Scale Calculator
The Font Size Scale Calculator produces a font size on a modular scale: base × ratio^step. A modular scale (e.g. ratio 1.25 "major third") creates a harmonious typographic hierarchy. The result is shown in px and rem.
Useful for building design systems and consistent heading scales.
FAQ
Is this Font Size Scale Calculator accurate?
Yes. It uses standard formulas and runs directly in your browser at full JavaScript precision (plus BigInt/decimal.js for large numbers where needed).
Is my data sent to a server?
No. All calculations happen entirely on your device. No values are sent to or stored on our servers.