Live · calculated from the IANA time-zone database

Time difference between Chicago and Mumbai

Short answer

Mumbai is 10 hours and 30 minutes ahead of Chicago. Right now it is 07:33 in Chicago (CDT, UTC−5) and 18:03 in Mumbai (GMT+5:30, UTC+5:30).

Right now

Chicago · United States

07:33

Tuesday, September 15, 2026

Central Daylight Time · CDT · UTC−5

Mumbai · India

18:03

Tuesday, September 15, 2026

India Standard Time · GMT+5:30 · UTC+5:30

Times at the moment this page was generated. Reload for a fresh reading.

Does the difference between Chicago and Mumbai change during the year?

Yes. For 238 days of 2026 the difference is 10 hours and 30 minutes, but it moves whenever Chicago or Mumbai enters or leaves daylight saving time. Here is the full 2026 calendar (dates in UTC):

From	Until	Mumbai vs Chicago
January 1	March 8	+11:30 h
March 8	November 1	+10:30 h
November 1	December 31	+11:30 h

The highlighted row is the current period. Every date comes from each zone's official rules, not from a hand-typed table.

Best time to call Mumbai from Chicago (and vice versa)

With 10 hours and 30 minutes between them there is no hour at which Chicago and Mumbai are both inside a 9:00–17:00 working day. Teams split across these two cities usually alternate the sacrifice: one week the meeting lands early (7:00–8:00) in Chicago and late (18:00–19:00) in the other city, the next week the other way round. The Timezone Matcher grid shades exactly those compromise hours.

Chicago to Mumbai conversion table

Each Chicago hour and its equivalent in Mumbai today. Rows shaded green are working hours (9:00–17:00) in both cities at once.

Chicago time · Tue, Sep 15	Mumbai time
00:00	10:30
01:00	11:30
02:00	12:30
03:00	13:30
04:00	14:30
05:00	15:30
06:00	16:30
07:00	17:30
08:00	18:30
09:00	19:30
10:00	20:30
11:00	21:30
12:00	22:30
13:00	23:30
14:00	00:30next day
15:00	01:30next day
16:00	02:30next day
17:00	03:30next day
18:00	04:30next day
19:00	05:30next day
20:00	06:30next day
21:00	07:30next day
22:00	08:30next day
23:00	09:30next day

Looking for it the other way round? This page covers both directions: Mumbai to Chicago is the same difference with the sign flipped.

The two time zones

Chicago — America/Chicago

Chicago follows Central Time (CT): UTC−6 in winter (CST) and UTC−5 in summer (CDT), shared with Dallas, Houston and most of the US Midwest and South.

Mumbai — Asia/Kolkata

Mumbai, like all of India, uses India Standard Time (IST), a fixed UTC+5:30. The half-hour offset and the absence of daylight saving make Indian conversions the most error-prone in remote teams.

Frequently asked questions

How many hours difference between Chicago and Mumbai?

Mumbai is 10 hours and 30 minutes ahead of Chicago. For most of the year (238 days) the difference is 10 hours and 30 minutes; it shifts during the weeks when one of the two cities enters or leaves daylight saving time.

When it is 12:00 noon in Chicago, what time is it in Mumbai?

22:30 in Mumbai (at today's difference of 10 hours and 30 minutes).

What is the best time for a meeting between Chicago and Mumbai?

There is no overlap between the 9:00–17:00 working days of Chicago and Mumbai. Teams usually alternate: an early-morning slot in Chicago lands in the late evening of the other city.

Do Chicago and Mumbai observe daylight saving time?

Chicago: yes. Mumbai: no. Because only one of them changes its clocks, the difference moves by one hour twice a year.

What time zone is Chicago in? And Mumbai?

Chicago: Central Daylight Time (America/Chicago, UTC−5). Mumbai: India Standard Time (Asia/Kolkata, UTC+5:30).

Tools

Meeting grid — add both cities and click a slot

Time zone converter — any city, any time

Working hours overlap calculator

Daylight saving time 2027 — all dates