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Open toolTypographic Scale Calculator
Build a finite type scale and copy CSS custom properties for the computed pixel sizes. Provide Base font size (px), Scale ratio, Steps below base to compute results directly in your browser. Size at step i = base × ratio^i. Steps below and above the base are bounded to 20 each. CSS variable names use minusN for negative steps; this is a size scale, not a font loading or accessibility check. Numeric output uses up to 12 significant digits; floating-point rounding can occur. Common search workflows supported include "font scale", "font size calculator", "font calc".
Free to useNo sign-upRuns in your browser
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Enter the inputs, then select Calculate.
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How the Typographic Scale Calculator Works & Core Formula
The Typographic Scale Calculator evaluates Base font size (px), Scale ratio, Steps below base in client-side JavaScript using the deterministic rule below and updates the output panel immediately without uploading data to a server.
Build a finite type scale and copy CSS custom properties for the computed pixel sizes.
Size at step i = base × ratio^i. Steps below and above the base are bounded to 20 each. CSS variable names use minusN for negative steps; this is a size scale, not a font loading or accessibility check. Numeric output uses up to 12 significant digits; floating-point rounding can occur.
Typographic Scale Calculator Quick Reference & Input Guide
Review the input parameters, allowed value ranges, and worked reference cases for the Typographic Scale Calculator below before running your calculation.
| Parameter / Scenario | Default / Sample Value | Rule or Allowed Range | Output / Usage Note |
|---|---|---|---|
| Input: Base font size (px) | 16 | Range: 0.1 to 1000 | Required workspace parameter |
| Input: Scale ratio | 1.25 | Range: 0.1 to 10 | Required workspace parameter |
| Input: Steps below base | 2 | Range: 0 to 20 | Required workspace parameter |
| Input: Steps above base | 3 | Range: 0 to 20 | Required workspace parameter |
| Worked Case 1: Baseline run (Base font size (px) = 16) | Preloaded / test values | Build a finite type scale and copy CSS custom properties for the computed pixel sizes | Base font size (px) = 16; Scale ratio = 1.25; Steps below base = 2; Steps above base = 3. Output excerpt: Scale (px): -2: 10.24; -1: 12.8; 0: 16; 1: 20; 2: 25; 3: 31.25; CSS variables: --font-size-minus2: 10.24px;; --font-size-minus1: 12.8px;; --font-size-0: 16px;. |
| Worked Case 2: Comparison scenario (Modular Scale Generator) | Preloaded / test values | Build a finite type scale and copy CSS custom properties for the computed pixel sizes | Base font size (px) = 20; Scale ratio = 2; Steps below base = 1; Steps above base = 2. Output excerpt: Scale (px): -1: 10; 0: 20; 1: 40; 2: 80; CSS variables: --font-size-minus1: 10px;; --font-size-0: 20px;; --font-size-1: 40px;. |
Step-by-Step Guide to Using the Typographic Scale Calculator
Follow these three steps to configure Base font size (px), Scale ratio, Steps below base, verify unit and boundary rules, and export your Typographic Scale Calculator output.
Input and settings
Check units and mode
Size at step i = base × ratio^i. Steps below and above the base are bounded to 20 each. CSS variable names use minusN for negative steps; this is a size scale, not a font loading or accessibility check. Numeric output uses up to 12 significant digits; floating-point rounding can occur.
Tool result
Calculate and save
Select Calculate, check the labelled result, then use Copy result or Download result.txt.
Review the details
Practical Worked Examples for Typographic Scale Calculator
These concrete scenarios illustrate how the Typographic Scale Calculator processes baseline inputs, comparison checks, and boundary constraints.
Baseline run (Base font size (px) = 16)
Base font size (px) = 16; Scale ratio = 1.25; Steps below base = 2; Steps above base = 3. Output excerpt: Scale (px): -2: 10.24; -1: 12.8; 0: 16; 1: 20; 2: 25; 3: 31.25; CSS variables: --font-size-minus2: 10.24px;; --font-size-minus1: 12.8px;; --font-size-0: 16px;.
Comparison scenario (Modular Scale Generator)
Base font size (px) = 20; Scale ratio = 2; Steps below base = 1; Steps above base = 2. Output excerpt: Scale (px): -1: 10; 0: 20; 1: 40; 2: 80; CSS variables: --font-size-minus1: 10px;; --font-size-0: 20px;; --font-size-1: 40px;.
Boundary & unit check (Font Scale)
When solving for 'font scale', verify that Base font size (px), Scale ratio, Steps below base use consistent units and stay within the documented scope: Size at step i = base × ratio^i. Steps below and above the base are bounded to 20 each. CSS variable names use minusN for negative steps; this is a size scale, not a font loading or accessibility check. Numeric output uses up to 12 significant digits; floating-point rounding can occur.
How to Read and Verify the Typographic Scale Calculator Output
The output panel reports the exact result derived from Base font size (px), Scale ratio, Steps below base alongside any unit or formatting notes.
Every calculation follows the rule: Build a finite type scale and copy CSS custom properties for the computed pixel sizes. Because JavaScript uses IEEE 754 double-precision floating-point arithmetic, numeric outputs display up to 12 significant digits where applicable.
Always cross-check the displayed result against the scope note (Size at step i = base × ratio^i. Steps below and above the base are bounded to 20 each. CSS variable names use minusN for negative steps; this is a size scale, not a font loading or accessibility check. Numeric output uses up to 12 significant digits; floating-point rounding can occur) before applying the value to production specifications, financial models, or lab records.
Scope Limits, Accuracy Assumptions & Related Everyday Math Tools
Review these boundary constraints and validation rules before relying on the Typographic Scale Calculator output.
Operational scope: Size at step i = base × ratio^i. Steps below and above the base are bounded to 20 each. CSS variable names use minusN for negative steps; this is a size scale, not a font loading or accessibility check. Numeric output uses up to 12 significant digits; floating-point rounding can occur. Inputs that violate minimum/maximum bounds or required format rules are rejected with a clear diagnostic prompt.
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Open toolFrequently Asked Questions About Typographic Scale Calculator
Answers about using Typographic Scale Calculator and understanding its results.
How do I calculate font scale using the Typographic Scale Calculator?
The Typographic Scale Calculator applies the rule: Build a finite type scale and copy CSS custom properties for the computed pixel sizes. Enter Base font size (px), Scale ratio, Steps below base into the workspace and the tool computes the exact output in your browser.
Can I use this tool for font size calculator?
Yes. Provide Base font size (px), Scale ratio, Steps below base using the documented units and format shown in the quick reference table above. Preloaded default values let you test the workflow immediately.
What are the accuracy limits and boundary assumptions for Typographic Scale Calculator?
Size at step i = base × ratio^i. Steps below and above the base are bounded to 20 each. CSS variable names use minusN for negative steps; this is a size scale, not a font loading or accessibility check. Numeric output uses up to 12 significant digits; floating-point rounding can occur. Confirm that your inputs fall within the allowed ranges before exporting the result.
Is the Typographic Scale Calculator free and does it keep my inputs private?
Yes. All calculations for the Typographic Scale Calculator execute 100% locally in your browser's JavaScript runtime. No inputs or results are uploaded to any external server.
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