Aisha K.
Mar 12, 2026
Clean layout and the results update instantly. Exactly what I needed for a quick planning check.
Unit Converters
Line Height Multiplier Calculator
line-height px = font-size × multiplier.
Unitless line-height 1.5 on 16 px type is 24 px. Headlines often 1.15–1.3; body 1.45–1.7. A length in px will not inherit as nicely as a unitless multiplier.
Multiplier
× → px
24 px
1.5 is a common body rhythm. Headlines often sit tighter.
- Multiplier
- 1.5
- Font size
- 16 px
Plain-English guide
Terms & how it works
Confused by a field? Read the short definitions here while you use the tool.
Multiplier
The “Multiplier” value used in this tool’s formula. Adjust it to see results update live.
Font size (px)
The “Font size (px)” value used in this tool’s formula. Adjust it to see results update live.
How this calculator works
Unitless line-height 1.5 on 16 px type is 24 px. Headlines often 1.15–1.3; body 1.45–1.7. A length in px will not inherit as nicely as a unitless multiplier. line-height px = font-size × multiplier. Example: 16 px × 1.5 → 24 px. 24 px × 1.2 → 28.8 px.
line-height px = font-size × multiplier.
Example: 16 px × 1.5 → 24 px. 24 px × 1.2 → 28.8 px.
When to use this Line Height Multiplier
Common use cases
- Unitless line-height 1.5 on 16 px type is 24 px. Headlines often 1.15–1.3; body 1.45–1.7. A length in px will not inherit as nicely as a unitless multiplier.
- Sanity-check with this case: 16 px × 1.5 → 24 px. 24 px × 1.2 → 28.8 px.
- The relationship is: line-height px = font-size × multiplier.
Localized examples
- Unit Converters: the example on this page uses the same formula as the widget.
What you get
- Fields: Multiplier, Font size (px)
- line-height px = font-size × multiplier.
- Example on the page: 16 px × 1.5 → 24 px. 24 px × 1.2 → 28.8 px.
How to Convert Line Height Multiplier Step-by-Step
- 1Enter Multiplier, Font size (px). Use the values you have, not a catalog average, unless that is all you know.
- 2line-height px = font-size × multiplier.
- 3Worked case: 16 px × 1.5 → 24 px. 24 px × 1.2 → 28.8 px.
- 4Check which dictionary the other person is using — US or UK, decimal or 1,024 — then trust the number.
Governing formula
line-height px = font-size × multiplier.
16 px × 1.5 → 24 px. 24 px × 1.2 → 28.8 px.
Example: set Multiplier = 1.5, Font size (px) = 16, then read the result.
Variable definitions
- value
Multiplier
The “Multiplier” field. Default 1.5; typical range 0.8–2.4.
- fontPx
Font size (px)
The “Font size (px)” field. Default 16; typical range 8–72.
- The conversion (line-height px = font-size × multiplier.) does not pick US vs UK gallons, SI vs binary megabytes, or Mach at altitude for you. Read the footnote on the page.
- Nothing here is uploaded for the calculation itself.
Frequently Asked Questions
Children inherit the multiplier, not a stale 24 px.
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Community
Reviews & Ratings
See what others think about this tool, then leave your own rating to help improve CalculioHub.
4.8
out of 5.0
4 reviews
Daniel R.
Feb 28, 2026
Very usable on mobile. Would love a save/export option later, but the math feels solid.
Priya S.
Feb 3, 2026
The FAQ section answered my questions before I even had to search. Smooth dark mode too.
Marcus L.
Jan 19, 2026
Simple inputs, clear outputs. This replaced three bookmarks I used to juggle.
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