Days to Months Conversion Table

Convert 1-365 days to months

Any time value in d can be converted to mo using the conversion factor:

  • 1 day = 0.0328542 month
  • months = days ÷ 30.4375

d → mo Quick Converter

d
mo

Need more features? Try our complete day to month converter.

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What is Day (d)?

d — The day is a unit of time equal to exactly 86,400 seconds, 1,440 minutes, or 24 hours.

What is Month (mo)?

The month is a unit of time approximately equal to the period of the Moon's orbit (29.53 days for a synodic month).

How to Convert Day to Month

months = days ÷ 30.4375

Example

Convert 37 d to mo:

37 × 0.0328542 = 1.21561 mo

Days to Months Conversion Table

Values from 1 to 365 d.

d to mo (1 – 183 d)
d mo
1 0.0328542
2 0.0657084
3 0.0985626
4 0.131417
5 0.164271
6 0.197125
7 0.229979
8 0.262834
9 0.295688
10 0.328542
11 0.361396
12 0.394251
13 0.427105
14 0.459959
15 0.492813
16 0.525667
17 0.558522
18 0.591376
19 0.62423
20 0.657084
21 0.689938
22 0.722793
23 0.755647
24 0.788501
25 0.821355
26 0.854209
27 0.887064
28 0.919918
29 0.952772
30 0.985626
31 1.01848
32 1.05133
33 1.08419
34 1.11704
35 1.1499
36 1.18275
37 1.21561
38 1.24846
39 1.28131
40 1.31417
41 1.34702
42 1.37988
43 1.41273
44 1.44559
45 1.47844
46 1.51129
47 1.54415
48 1.577
49 1.60986
50 1.64271
51 1.67556
52 1.70842
53 1.74127
54 1.77413
55 1.80698
56 1.83984
57 1.87269
58 1.90554
59 1.9384
60 1.97125
61 2.00411
62 2.03696
63 2.06982
64 2.10267
65 2.13552
66 2.16838
67 2.20123
68 2.23409
69 2.26694
70 2.29979
71 2.33265
72 2.3655
73 2.39836
74 2.43121
75 2.46407
76 2.49692
77 2.52977
78 2.56263
79 2.59548
80 2.62834
81 2.66119
82 2.69405
83 2.7269
84 2.75975
85 2.79261
86 2.82546
87 2.85832
88 2.89117
89 2.92402
90 2.95688
91 2.98973
92 3.02259
93 3.05544
94 3.0883
95 3.12115
96 3.154
97 3.18686
98 3.21971
99 3.25257
100 3.28542
101 3.31828
102 3.35113
103 3.38398
104 3.41684
105 3.44969
106 3.48255
107 3.5154
108 3.54825
109 3.58111
110 3.61396
111 3.64682
112 3.67967
113 3.71253
114 3.74538
115 3.77823
116 3.81109
117 3.84394
118 3.8768
119 3.90965
120 3.94251
121 3.97536
122 4.00821
123 4.04107
124 4.07392
125 4.10678
126 4.13963
127 4.17248
128 4.20534
129 4.23819
130 4.27105
131 4.3039
132 4.33676
133 4.36961
134 4.40246
135 4.43532
136 4.46817
137 4.50103
138 4.53388
139 4.56674
140 4.59959
141 4.63244
142 4.6653
143 4.69815
144 4.73101
145 4.76386
146 4.79671
147 4.82957
148 4.86242
149 4.89528
150 4.92813
151 4.96099
152 4.99384
153 5.02669
154 5.05955
155 5.0924
156 5.12526
157 5.15811
158 5.19097
159 5.22382
160 5.25667
161 5.28953
162 5.32238
163 5.35524
164 5.38809
165 5.42094
166 5.4538
167 5.48665
168 5.51951
169 5.55236
170 5.58522
171 5.61807
172 5.65092
173 5.68378
174 5.71663
175 5.74949
176 5.78234
177 5.8152
178 5.84805
179 5.8809
180 5.91376
181 5.94661
182 5.97947
183 6.01232
d to mo (184 – 365 d)
d mo
184 6.04517
185 6.07803
186 6.11088
187 6.14374
188 6.17659
189 6.20945
190 6.2423
191 6.27515
192 6.30801
193 6.34086
194 6.37372
195 6.40657
196 6.43943
197 6.47228
198 6.50513
199 6.53799
200 6.57084
201 6.6037
202 6.63655
203 6.6694
204 6.70226
205 6.73511
206 6.76797
207 6.80082
208 6.83368
209 6.86653
210 6.89938
211 6.93224
212 6.96509
213 6.99795
214 7.0308
215 7.06366
216 7.09651
217 7.12936
218 7.16222
219 7.19507
220 7.22793
221 7.26078
222 7.29363
223 7.32649
224 7.35934
225 7.3922
226 7.42505
227 7.45791
228 7.49076
229 7.52361
230 7.55647
231 7.58932
232 7.62218
233 7.65503
234 7.68789
235 7.72074
236 7.75359
237 7.78645
238 7.8193
239 7.85216
240 7.88501
241 7.91786
242 7.95072
243 7.98357
244 8.01643
245 8.04928
246 8.08214
247 8.11499
248 8.14784
249 8.1807
250 8.21355
251 8.24641
252 8.27926
253 8.31211
254 8.34497
255 8.37782
256 8.41068
257 8.44353
258 8.47639
259 8.50924
260 8.54209
261 8.57495
262 8.6078
263 8.64066
264 8.67351
265 8.70637
266 8.73922
267 8.77207
268 8.80493
269 8.83778
270 8.87064
271 8.90349
272 8.93634
273 8.9692
274 9.00205
275 9.03491
276 9.06776
277 9.10062
278 9.13347
279 9.16632
280 9.19918
281 9.23203
282 9.26489
283 9.29774
284 9.3306
285 9.36345
286 9.3963
287 9.42916
288 9.46201
289 9.49487
290 9.52772
291 9.56057
292 9.59343
293 9.62628
294 9.65914
295 9.69199
296 9.72485
297 9.7577
298 9.79055
299 9.82341
300 9.85626
301 9.88912
302 9.92197
303 9.95483
304 9.98768
305 10.0205
306 10.0534
307 10.0862
308 10.1191
309 10.152
310 10.1848
311 10.2177
312 10.2505
313 10.2834
314 10.3162
315 10.3491
316 10.3819
317 10.4148
318 10.4476
319 10.4805
320 10.5133
321 10.5462
322 10.5791
323 10.6119
324 10.6448
325 10.6776
326 10.7105
327 10.7433
328 10.7762
329 10.809
330 10.8419
331 10.8747
332 10.9076
333 10.9405
334 10.9733
335 11.0062
336 11.039
337 11.0719
338 11.1047
339 11.1376
340 11.1704
341 11.2033
342 11.2361
343 11.269
344 11.3018
345 11.3347
346 11.3676
347 11.4004
348 11.4333
349 11.4661
350 11.499
351 11.5318
352 11.5647
353 11.5975
354 11.6304
355 11.6632
356 11.6961
357 11.729
358 11.7618
359 11.7947
360 11.8275
361 11.8604
362 11.8932
363 11.9261
364 11.9589
365 11.9918

Frequently Asked Questions

How many months are in 30 days?

Using the mean month of 30.4375 days, 30 days equals approximately 0.9856 months, which is just under one calendar month.

How do I convert days to months?

Divide the number of days by 30.4375 (the average number of days per month). For example, 90 days ÷ 30.4375 ≈ 2.9569 months.

Why is 30.4375 used instead of 30?

The value 30.4375 is the mean month length derived from the Julian year (365.25 days ÷ 12 months), which accounts for months of varying lengths and leap years.

How many months are in 365 days?

There are approximately 11.9918 months in 365 days (365 ÷ 30.4375), which is just under 12 calendar months.

Conversion factors verified against NIST, BIPM, ISO 8601 Second defined by Cs-133 transition (SI, BIPM). Last reviewed: March 2026
Tiago Fernandes Reviewed by Tiago Fernandes