Fira Sans
Fira Sans is a sans serif font in 9 weights with italics. Its lowercase letters are about as wide as the typical sans serif font. Last updated 11 September 2025.
Editing a PDF that uses Fira Sans
Most PDFs embed only the letters they already use. Type a new letter and many editors either refuse or swap in a different font. MythosPDF recognises Fira Sans from the widths stored in your PDF, loads the complete open font, and sets your new text in Fira Sans itself. The rest of the page is carried over untouched.
Measured metrics
| Average lowercase letter width | 507.9 units per 1000 em |
|---|---|
| Average capital letter width | 583 units per 1000 em |
| Word space | 265 units per 1000 em |
| Digits | proportional (digit widths differ) |
| Spacing | proportional |
| Width of i compared with m | 33% |
| Printable ASCII characters covered | 94 of 94 |
| Category | Sans serif |
Weights and styles
- Fira Sans Thin Italic
- Fira Sans Thin
- Fira Sans ExtraLight Italic
- Fira Sans ExtraLight
- Fira Sans Light Italic
- Fira Sans Light
- Fira Sans Italic
- Fira Sans Regular
- Fira Sans Medium Italic
- Fira Sans Medium
- Fira Sans SemiBold Italic
- Fira Sans SemiBold
- Fira Sans Bold Italic
- Fira Sans Bold
- Fira Sans ExtraBold Italic
- Fira Sans ExtraBold
- Fira Sans Black Italic
- Fira Sans Black
Languages beyond basic Latin
Open fonts closest to Fira Sans
Measured on every printable character both fonts contain. A smaller difference means the same words take the same space, so lines break in the same places.
- FiraGO Regularnearly identical widths (1 units)
- Fira Sans Condensed Regularsimilar widths (29.2 units)
- Scada Regularloosely similar widths (30.5 units)
- Tirra Regularloosely similar widths (30.6 units)
- Akatab Regularloosely similar widths (30.6 units)
- Baloo Bhai 2 Regularloosely similar widths (31.3 units)
- Baloo Da 2 Regularloosely similar widths (31.4 units)
- Baloo Thambi 2 Regularloosely similar widths (31.4 units)
Compare Fira Sans
Questions people ask
+Can I edit a PDF that uses Fira Sans?
Yes. Drop the PDF into MythosPDF and click the text. New letters are set in Fira Sans itself, loaded from the open font, so the edit matches the rest of the page.
+Is Fira Sans free to use?
Fira Sans is released under the SIL Open Font License 1.1, an open licence that allows free use in documents, including commercial ones. Check the licence text for your exact use.
+Which font is closest to Fira Sans?
By measured letter widths, FiraGO is the closest match among open fonts (a mean difference of 1 units per 1000 em). Text set in one takes almost the same space in the other.
+Which languages does Fira Sans support?
It includes these character sets: Cyrillic, Cyrillic Extended, Greek, Greek Extended, Latin, Central European, Vietnamese.
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