How to convert gradians to degrees
To convert gradians to degrees, multiply by 0.9. Angle conversions are used in trigonometry, programming, surveying, navigation and engineering.
Gradian to Degree conversion table
| Gradian (gon) | Degree (°) |
|---|---|
| 0.1 gon | 0.09 ° |
| 0.5 gon | 0.45 ° |
| 1 gon | 0.9 ° |
| 2 gon | 1.8 ° |
| 3 gon | 2.7 ° |
| 4 gon | 3.6 ° |
| 5 gon | 4.5 ° |
| 10 gon | 9 ° |
| 20 gon | 18 ° |
| 25 gon | 22.5 ° |
| 50 gon | 45 ° |
| 100 gon | 90 ° |
| 500 gon | 450 ° |
| 1,000 gon | 900 ° |
About the units
Gradian (gon)
A gradian (gon) is 1/400 of a full turn, used in surveying.
Degree (°)
A degree is 1/360 of a full rotation.
How to use this converter
- Type the number of gradians (gon) in the input box.
- The result in degrees appears instantly — no button needed.
- See the same value in every other angle unit just below.
- Use “Swap units” to convert degrees back to gradians.
Tips for better results
- Double-check which system a unit belongs to (for example US vs UK gallons).
- Use the swap button to convert in the opposite direction instantly.
- Bookmark the conversions you use most — each pair has its own page.
Frequently asked questions
How many degrees are in one gradian?
One gradian equals 0.9 degrees. 0.9 is the exact factor used by this converter.
How do I convert gradians to degrees?
Multiply the value in gradians by 0.9. To go the other way, multiply degrees by 1.11111111111.
What is 10 gon in °?
10 gon = 9 °. Also, 5 gon = 4.5 ° and 100 gon = 90 °.
What is the difference between a gradian and a degree?
A gradian (gon) is 1/400 of a full turn, used in surveying. A degree is 1/360 of a full rotation.
Is this tool free and private?
Yes — the Gradian to Degree is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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