377 in octal is 255 in decimal
All conversions
| Unit | Symbol | Value |
|---|
Quick answer
To convert octal to decimal, read the digits as a base-8 number and rewrite the same whole number in base 10. For example, 377 in octal is 255 in decimal.
How to Convert Octal to Decimal
Read the digits as a base-8 number and rewrite the same whole number in base 10. 377 in octal is 255 in decimal. Type any value in the converter above for an instant answer, or use the chart below for the most common values.
This page is preset for octal to decimal conversions, but you can switch either list to any of the 39 units in the Numbers Converter, or go the other way with the Decimal to Octal converter.
Octal to Decimal conversion chart
| Octal | Decimal |
|---|---|
| 0 base 8 | 0 base 10 |
| 1 base 8 | 1 base 10 |
| 2 base 8 | 2 base 10 |
| 3 base 8 | 3 base 10 |
| 4 base 8 | 4 base 10 |
| 5 base 8 | 5 base 10 |
| 6 base 8 | 6 base 10 |
| 7 base 8 | 7 base 10 |
| 10 base 8 | 8 base 10 |
| 11 base 8 | 9 base 10 |
| 12 base 8 | 10 base 10 |
| 13 base 8 | 11 base 10 |
| 14 base 8 | 12 base 10 |
| 15 base 8 | 13 base 10 |
| 16 base 8 | 14 base 10 |
| 17 base 8 | 15 base 10 |
| 20 base 8 | 16 base 10 |
| 21 base 8 | 17 base 10 |
| 22 base 8 | 18 base 10 |
| 23 base 8 | 19 base 10 |
| 24 base 8 | 20 base 10 |
| 25 base 8 | 21 base 10 |
| 26 base 8 | 22 base 10 |
| 27 base 8 | 23 base 10 |
| 30 base 8 | 24 base 10 |
| 31 base 8 | 25 base 10 |
| 32 base 8 | 26 base 10 |
| 33 base 8 | 27 base 10 |
| 34 base 8 | 28 base 10 |
| 35 base 8 | 29 base 10 |
| 36 base 8 | 30 base 10 |
| 37 base 8 | 31 base 10 |
| 40 base 8 | 32 base 10 |
| 62 base 8 | 50 base 10 |
| 100 base 8 | 64 base 10 |
| 144 base 8 | 100 base 10 |
| 177 base 8 | 127 base 10 |
| 200 base 8 | 128 base 10 |
| 377 base 8 | 255 base 10 |
| 400 base 8 | 256 base 10 |
| 764 base 8 | 500 base 10 |
| 1000 base 8 | 512 base 10 |
| 1750 base 8 | 1000 base 10 |
| 2000 base 8 | 1024 base 10 |
| 10000 base 8 | 4096 base 10 |
| 177777 base 8 | 65535 base 10 |
| 777 base 8 | 511 base 10 |
Common Octal to Decimal conversions
- 377 in octal is 255 in decimal
- 7 base 8 = 7 base 10
- 10 base 8 = 8 base 10
- 17 base 8 = 15 base 10
- 777 base 8 = 511 base 10
- 1000 base 8 = 512 base 10
Popular numbers converters
How to Use the Octal to Decimal Converter
- Type a value in the From box and choose its unit.
- Pick the unit you want in the To list — the result updates as you type.
- Use the swap button to reverse the conversion, or type in the To box to convert backwards.
- Check the All conversions table to see your value in every unit; click a row to make it the target.
Frequently Asked Questions
How do I convert Octal to Decimal?
Read the digits as a base-8 number and rewrite the same whole number in base 10. For example, 377 in octal is 255 in decimal. Type any octal number in the converter above to get the decimal value instantly.
What is the Octal to Decimal formula?
Read the digits as a base-8 number and rewrite the same whole number in base 10.
What is 7 in decimal?
7 in octal = 7 in decimal.
What is 10 in decimal?
10 in octal = 8 in decimal.
What is 17 in decimal?
17 in octal = 15 in decimal.
What is 777 in decimal?
777 in octal = 511 in decimal.
What is 1000 in decimal?
1000 in octal = 512 in decimal.
How do I convert Decimal back to Octal?
Use the swap button in the converter above, or open our Decimal to Octal converter. Read the digits as a base-10 number and rewrite the same whole number in base 8.
Is this Octal to Decimal converter accurate?
Yes. It uses exact unit definitions and double-precision maths, and you can show up to 15 significant digits. The table below is calculated with the same formula.
Can I convert Octal to other numbers units?
Yes — pick any unit in the From and To lists above, or open the full Numbers Converter, which handles 39 numbers units.
Is the Octal to Decimal converter free?
Yes, it is free with no sign-up, and every conversion runs in your browser so nothing is sent to a server.