Convert from Decimal (Base 10) to Octal (Base 8)
Perform the conversion of numbers between different numerical systems.
Decimal (Base 10) = Octal (Base 8)
Information about conversion units:
About Decimal (Base 10)
The Decimal Number System is a positional numeral system and is the system that we all use without realizing why. The Decimal System uses 10 digits (from 0 to 9). By combining these digits, larger numbers can be expressed.
About Octal (Base 8)
The octal system is the positional numeral system with a base of 8, using the Arabic-Indic digits: 0, 1, 2, 3, 4, 5, 6, 7. In computing, octal numbering is sometimes used instead of hexadecimal. It has the advantage of not requiring symbols other than digits.
Decimal (Base 10) vs Octal (Base 8)
Decimal (Base 10) | Octal (Base 8) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 3 |
4 | 4 |
5 | 5 |
6 | 6 |
7 | 7 |
8 | 10 |
9 | 11 |
¿How to convert from Decimal (Base 10) to Octal (Base 8)?
Note: To convert a decimal number (base 10) to an octal number (base 8), follow these steps:
- Divide the decimal number by 8 and record the remainders of the divisions until the division result is 0.
- The remainders from the divisions should be written in reverse order as they were obtained, as they represent the weights of the corresponding octal digits.
Here's an example of converting the decimal number 159 to octal:
- Divide 159 by 8: 159 ÷ 8 = 19 with a remainder of 7.
- Divide 19 by 8: 19 ÷ 8 = 2 with a remainder of 3.
- Divide 2 by 8: 2 ÷ 8 = 0 with a remainder of 2.
The remainders of the divisions are written in reverse order: 237.
Therefore, the decimal number 159 converts to 237 in octal.

Conversion table of Decimal (Base 10) to Octal (Base 8)
Decimal (Base 10) | Octal (Base 8) |
---|---|
1 | 1 |
2 | 2 |
3 | 3 |
4 | 4 |
5 | 5 |
6 | 6 |
7 | 7 |
8 | 10 |
9 | 11 |
10 | 12 |
11 | 13 |
12 | 14 |
13 | 15 |
14 | 16 |
15 | 17 |
16 | 20 |
17 | 21 |
18 | 22 |
19 | 23 |
20 | 24 |
21 | 25 |
22 | 26 |
23 | 27 |
24 | 30 |
25 | 31 |
26 | 32 |
27 | 33 |
28 | 34 |
29 | 35 |
30 | 36 |
31 | 37 |
32 | 40 |
33 | 41 |
34 | 42 |
35 | 43 |
36 | 44 |
37 | 45 |
38 | 46 |
39 | 47 |
40 | 50 |
41 | 51 |
42 | 52 |
43 | 53 |
44 | 54 |
45 | 55 |
46 | 56 |
47 | 57 |
48 | 60 |
49 | 61 |
50 | 62 |
51 | 63 |
52 | 64 |
53 | 65 |
54 | 66 |
55 | 67 |
56 | 70 |
57 | 71 |
58 | 72 |
59 | 73 |
60 | 74 |
61 | 75 |
62 | 76 |
63 | 77 |
64 | 100 |
65 | 101 |
66 | 102 |
67 | 103 |
68 | 104 |
69 | 105 |
70 | 106 |
71 | 107 |
72 | 110 |
73 | 111 |
74 | 112 |
75 | 113 |
76 | 114 |
77 | 115 |
78 | 116 |
79 | 117 |
80 | 120 |
81 | 121 |
82 | 122 |
83 | 123 |
84 | 124 |
85 | 125 |
86 | 126 |
87 | 127 |
88 | 130 |
89 | 131 |
90 | 132 |
91 | 133 |
92 | 134 |
93 | 135 |
94 | 136 |
95 | 137 |
96 | 140 |
97 | 141 |
98 | 142 |
99 | 143 |
100 | 144 |
101 | 145 |
102 | 146 |
103 | 147 |
104 | 150 |
105 | 151 |
106 | 152 |
107 | 153 |
108 | 154 |
109 | 155 |
110 | 156 |
111 | 157 |
112 | 160 |
113 | 161 |
114 | 162 |
115 | 163 |
116 | 164 |
117 | 165 |
118 | 166 |
119 | 167 |
120 | 170 |
121 | 171 |
122 | 172 |
123 | 173 |
124 | 174 |
125 | 175 |
126 | 176 |
127 | 177 |
128 | 200 |
129 | 201 |
130 | 202 |
131 | 203 |
132 | 204 |
133 | 205 |
134 | 206 |
135 | 207 |
136 | 210 |
137 | 211 |
138 | 212 |
139 | 213 |
140 | 214 |
141 | 215 |
142 | 216 |
143 | 217 |
144 | 220 |
145 | 221 |
146 | 222 |
147 | 223 |
148 | 224 |
149 | 225 |
150 | 226 |
151 | 227 |
152 | 230 |
153 | 231 |
154 | 232 |
155 | 233 |
156 | 234 |
157 | 235 |
158 | 236 |
159 | 237 |
160 | 240 |
161 | 241 |
162 | 242 |
163 | 243 |
164 | 244 |
165 | 245 |
166 | 246 |
167 | 247 |
168 | 250 |
169 | 251 |
170 | 252 |
171 | 253 |
172 | 254 |
173 | 255 |
174 | 256 |
175 | 257 |
176 | 260 |
177 | 261 |
178 | 262 |
179 | 263 |
180 | 264 |
181 | 265 |
182 | 266 |
183 | 267 |
184 | 270 |
185 | 271 |
186 | 272 |
187 | 273 |
188 | 274 |
189 | 275 |
190 | 276 |
191 | 277 |
192 | 300 |
193 | 301 |
194 | 302 |
195 | 303 |
196 | 304 |
197 | 305 |
198 | 306 |
199 | 307 |
200 | 310 |
201 | 311 |
202 | 312 |
203 | 313 |
204 | 314 |
205 | 315 |
206 | 316 |
207 | 317 |
208 | 320 |
209 | 321 |
210 | 322 |
211 | 323 |
212 | 324 |
213 | 325 |
214 | 326 |
215 | 327 |
216 | 330 |
217 | 331 |
218 | 332 |
219 | 333 |
220 | 334 |
221 | 335 |
222 | 336 |
223 | 337 |
224 | 340 |
225 | 341 |
226 | 342 |
227 | 343 |
228 | 344 |
229 | 345 |
230 | 346 |
231 | 347 |
232 | 350 |
233 | 351 |
234 | 352 |
235 | 353 |
236 | 354 |
237 | 355 |
238 | 356 |
239 | 357 |
240 | 360 |
241 | 361 |
242 | 362 |
243 | 363 |
244 | 364 |
245 | 365 |
246 | 366 |
247 | 367 |
248 | 370 |
249 | 371 |
250 | 372 |
251 | 373 |
252 | 374 |
253 | 375 |
254 | 376 |
255 | 377 |
256 | 400 |
257 | 401 |
258 | 402 |
259 | 403 |
260 | 404 |
261 | 405 |
262 | 406 |
263 | 407 |
264 | 410 |
265 | 411 |
266 | 412 |
267 | 413 |
268 | 414 |
269 | 415 |
270 | 416 |
271 | 417 |
272 | 420 |
273 | 421 |
274 | 422 |
275 | 423 |
276 | 424 |
277 | 425 |
278 | 426 |
279 | 427 |
280 | 430 |
281 | 431 |
282 | 432 |
283 | 433 |
284 | 434 |
285 | 435 |
286 | 436 |
287 | 437 |
288 | 440 |
289 | 441 |
290 | 442 |
291 | 443 |
292 | 444 |
293 | 445 |
294 | 446 |
295 | 447 |
296 | 450 |
297 | 451 |
298 | 452 |
299 | 453 |
300 | 454 |