5 hours 30 minutes difference
London
United Kingdom
--:-- --
GMT · UTC+0 Convert Delhi (GMT+5:30) to London (GMT) Time — 5 hours 30 minutes apart
Asia/Kolkata · GMT+5:30 · UTC+5:30 | Europe/London · GMT · UTC+0 · 5 hours 30 minutes difference · 836 cities · DST applies
24-Hour Overlap Timeline
✅ Overlap: 2:00 PM–6:00 PM in Delhi · 9:00 AM–1:00 PM in London (4h window)
⚠ London observes daylight saving time — offset may vary by up to 1 hour seasonally
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UTC → | ||||||||||||||||||||||||
| 🇮🇳 Delhi UTC+5:30 | 5a | 6a | 7a | 8a | 9a | 10a | 11a | 12p | 1p | 2p | 3p | 4p | 5p | 6p | 7p | 8p | 9p | 10p | 11p | 12a | 1a | 2a | 3a | 4a |
| 🇬🇧 London UTC+0 | 12a | 1a | 2a | 3a | 4a | 5a | 6a | 7a | 8a | 9a | 10a | 11a | 12p | 1p | 2p | 3p | 4p | 5p | 6p | 7p | 8p | 9p | 10p | 11p |
Both working Working Off hours Sleeping Now
Key Facts: Delhi (GMT+5:30) vs London (GMT)
Time Gap
5h 30m
Kolkata ahead
May vary ±1h (DST)
DST Status
✅ Kolkata
No DST
⏰ London: Observes DST
Cities in GMT+5:30
600
Largest: Delhi
32,226,000 pop.
Overlap Window
3h window
3:00 PM – 6:00 PM (GMT+5:30)
9:00 AM – 12:00 PM (GMT)
Find Cities in Kolkata & London Timezones
The GMT+5:30 and GMT timezones are separated by 5 hours 30 minutes. Delhi is the largest city in the Asia/Kolkata zone and London is the largest in Europe/London. London observes daylight saving time — the difference may change by 1 hour seasonally. For scheduling between these regions, the key fact is: there are 3 hours of mutual business-hours overlap each day.
Best Times to Schedule Calls: Delhi (GMT+5:30) ↔ London (GMT)
| Kolkata (GMT+5:30) | London (GMT) | Quality |
|---|---|---|
| 12:00 AM | 6:00 PM prev day | ❌ |
| 1:00 AM | 7:00 PM prev day | ❌ |
| 2:00 AM | 8:00 PM prev day | ❌ |
| 3:00 AM | 9:00 PM prev day | ❌ |
| 6:00 AM | 12:00 AM | ❌ |
| 7:00 AM | 1:00 AM | ❌ |
| 8:00 AM | 2:00 AM | ❌ |
| 9:00 AM | 3:00 AM | ❌ |
| 10:00 AM | 4:00 AM | ❌ |
| 11:00 AM | 5:00 AM | ❌ |
| 12:00 PM | 6:00 AM | ❌ |
| 1:00 PM | 7:00 AM | ⚠️ |
| 2:00 PM | 8:00 AM | ⚠️ |
| 3:00 PM | 9:00 AM | ✅ |
| 4:00 PM | 10:00 AM | ✅ |
| 5:00 PM | 11:00 AM | ✅ |
| 6:00 PM | 12:00 PM | ⚠️ |
| 7:00 PM | 1:00 PM | ⚠️ |
| 8:00 PM | 2:00 PM | ❌ |
| 9:00 PM | 3:00 PM | ❌ |
| 10:00 PM | 4:00 PM | ❌ |
| 11:00 PM | 5:00 PM | ❌ |
Work hours defined as 09:00–18:00 local time. ✅ Both in work hours ⚠️ Borderline ❌ Outside work hours.
GMT+5:30 to GMT: Complete 24-Hour Time Conversion Table
| Kolkata (GMT+5:30) | London (GMT) | IST (UTC+5:30) |
|---|---|---|
| 12:00 AM | 6:30 PM −1 | 12:00 AM |
| 1:00 AM | 7:30 PM −1 | 1:00 AM |
| 2:00 AM | 8:30 PM −1 | 2:00 AM |
| 3:00 AM | 9:30 PM −1 | 3:00 AM |
| 4:00 AM | 10:30 PM −1 | 4:00 AM |
| 5:00 AM | 11:30 PM −1 | 5:00 AM |
| ← Date changes in London → | ||
| 6:00 AM | 12:30 AM | 6:00 AM |
| 7:00 AM | 1:30 AM | 7:00 AM |
| 8:00 AM | 2:30 AM | 8:00 AM |
| 9:00 AM | 3:30 AM | 9:00 AM |
| 10:00 AM | 4:30 AM | 10:00 AM |
| 11:00 AM | 5:30 AM | 11:00 AM |
| 12:00 PM | 6:30 AM | 12:00 PM |
| 1:00 PM | 7:30 AM | 1:00 PM |
| 2:00 PM | 8:30 AM | 2:00 PM |
| 3:00 PM | 9:30 AM | 3:00 PM |
| 4:00 PM | 10:30 AM | 4:00 PM |
| 5:00 PM | 11:30 AM | 5:00 PM |
| 6:00 PM | 12:30 PM | 6:00 PM |
| 7:00 PM | 1:30 PM | 7:00 PM |
| 8:00 PM | 2:30 PM | 8:00 PM |
| 9:00 PM | 3:30 PM | 9:00 PM |
| 10:00 PM | 4:30 PM | 10:00 PM |
| 11:00 PM | 5:30 PM | 11:00 PM |
IST (India Standard Time, UTC+5:30) shown as reference for Indian users. +1/−1 indicates a different calendar day.
600 Cities in Kolkata (GMT+5:30) & 236 Cities in London (GMT) — Page 1 of 3
Delhi & 599 more — Kolkata (GMT+5:30, UTC+5:30)
- Delhi, IN guide ↗ 32.2M
- Mumbai, IN guide ↗ 25.0M
- Kolkata, IN guide ↗ 21.7M
- Bangalore, IN guide ↗ 15.4M
- Chennai, IN guide ↗ 12.4M
- Hyderabad, IN guide ↗ 10.5M
- Pune, IN guide ↗ 8.2M
- Ahmedabad, IN guide ↗ 8.0M
- Surat, IN guide ↗ 6.5M
- Prayagraj, IN guide ↗ 6.0M
- Belahi, IN guide ↗ 4.5M
- Nadampalaiyam, IN guide ↗ 3.5M
- Lucknow, IN guide ↗ 3.4M
- Kannankulam, IN guide ↗ 3.2M
- Jaipur, IN guide ↗ 3.1M
Kottarassheri, INAttadappa, INBarmhan Kalan, INMirzapur, INNagpur, INGhaziabad, INSupaul, INVadodara, INRajkot, INVishakhapatnam, INIndore, INThane, INBhopal, INAgra, INPeyanvilai, INPimpri-Chinchwad, INPatna, INBilaspur, INLudhiana, INMadurai, INJamshedpur, INNasik, INVijayawada, INFaridabad, INNajafgarh, INMeerut, INJabalpur, INKalyan, INVasai-Virar, INPanipat, INVaranasi, INKalleli, INSrinagar, INAurangabad, INDhanbad, INAmritsar, INAligarh, INGuwahati, INHaora, INRanchi, INGwalior, INChandigarh, INJodhpur, INRaipur, INKota, INBareilly, INCoimbatore, INSolapur, INHubli, INMysore, INTrichinopoly, INMoradabad, INTiruppur, INGurgaon, INJalandhar, INBhubaneshwar, INNarela, INBhayandar, INKarimnagar, INPatiala, INShishgarh, INColombo, LKThiruvananthapuram, INDurgapur, INBhiwandi, INBhilwara, INSaharanpur, INWarangal, INShiliguri, INSalem, INKochi, INGorakhpur, INGuntur, INKaraikandi, INHaldwani, INDhulia, INBhavnagar, INNoida, INBhangar, INBhilai, INMangalore, INBihta, INHasanpur, INCuttack, INSalimpur, INRaurkela, INTumkur, INDehra Dun, INKottayam, INAsansol, INBokaro Steel City, INKolhapur, INNava Raipur, INAjmer, INNanded, INAmravati, INNellore, INDispur, INGulbarga, INBikaner, INAgartala, INChanda, INLoni, INUjjain, INJhansi, INUlhasnagar, INJammu, INTuticorin, INPurnea, INBelgaum, INVellore, INMalegaon, INJamnagar, INBardoli, INGaya, INAmbattur, INJalgaon, INChhatarpur, INKurnool, INUdaipur, INWapi, INChauddagram, BDMathura, INSangli, INDavangere, INCalicut, INMothihari, INAkola, INBettiah, INShorapur, INTinnevelly, INBellary, INBhagalpur, INManampizha, INDelhi Cantonment, INSalt Lake City, INEtawa, INSonipat, INQuilon, INMulangodi, INMunro Turuttu, INKarur, INJalna, INBairia, INBhatpara, INSirur, INKakinada, INPanihati, INRohtak, INMaler Kotla, INKolga, INKorba, INSikar, INSasaram, INKarnal, INBrahmapur, INAhmadnagar, INShahjanpur, INAvadi, INKhanapur, INCuddapah, INAlamadi, INRajahmundry, INAlwar, INSambalpur, INMuzaffarpur, INKamarhati, INCampiernagar, INBijapur, INRatnagiri, INJagdalpur, INRampur, INShimoga, INKashipur, INJunagadh, INHapur, INPattikad, INTrichur, INBarddhaman, INPanvel, INNizamabad, INParbhani, INHisar, INFatehpur, INBirania, IN
London & 235 more — London (GMT, UTC+0)
- London, GB 11.3M
- Birmingham, GB 2.6M
- Portsmouth, GB 856K
- Southampton, GB 856K
- Bristol, GB 707K
- Glasgow, GB 626K
- Manchester, GB 548K
- Leeds, GB 536K
- Sheffield, GB 518K
- Liverpool, GB 513K
- Edinburgh, GB 488K
- Worthing, GB 474K
- Leicester, GB 464K
- Coventry, GB 363K
- Caerdydd, GB 361K
Belfast, GBReading, GBKingston upon Hull, GBNewcastle, GBStockport, GBBradford, GBNottingham, GBBolton, GBSunderland, GBPlymouth, GBMilton Keynes, GBDerby, GBWestminster, GBWolverhampton, GBAbertawe, GBBarnsley, GBStoke-on-Trent, GBSwindon, GBNorwich, GBLuton, GBSolihull, GBIslington, GBAberdeen, GBPeterborough, GBCroydon, GBBournemouth, GBBasildon, GBSaint Helens, GBIlford, GBWarrington, GBHuddersfield, GBSouthend, GBNewport, GBEnfield, GBIpswich, GBHarrow, GBDundee, GBWest Bromwich, GBGloucester, GBPoole, GBTelford, GBPreston, GBYork, GBMiddlesbrough, GBBlackpool, GBNorthampton, GBBrighton, GBSale, GBLincoln, GBTottenham, GBExeter, GBCambridge, GBRomford, GBColchester, GBHigh Wycombe, GBGateshead, GBSlough, GBBlackburn, GBCheltenham, GBChelmsford, GBRochdale, GBWythenshawe, GBBirkenhead, GBDoncaster, GBRotherham, GBMaidstone, GBWalthamstow, GBOxford, GBBasingstoke, GBCrawley, GBDagenham, GBGillingham, GBHalifax, GBSalford, GBWigan, GBHounslow, GBWembley, GBWorcester, GBEastbourne, GBWakefield, GBOldham, GBSutton Coldfield, GBHammersmith, GBHemel Hempstead, GBBath, GBHayes, GBDarlington, GBWimbledon, GBBedford, GBHove, GBSouthport, GBHastings, GBOrpington, GBWatford, GBStevenage, GBGrimsby, GBHartlepool, GBBromley, GBChester, GBFulham, GBNuneaton, GBDerry, GBEaling, GBWoolwich, GBAylesbury, GBAshford, GBStockton-on-Tees, GBSaint Albans, GBHarlow, GBBurnley, GBRedditch, GBEdmonton, GBBatley, GBScunthorpe, GBDudley, GBBury, GBEastleigh, GBBrixton, GBSouthall, GBPaisley, GBGuildford, GBChatham, GBEast Ham, GBWeston-super-Mare, GBCarlisle, GBSouth Shields, GBEast Kilbride, GBNewcastle under Lyme, GBBurton upon Trent, GBGravesend, GBTamworth, GBHarrogate, GBShrewsbury, GBGosport, GBLisburn, GBRugby, GBStafford, GBChingford, GBUxbridge, GBMansfield, GBRhondda, GBTynemouth, GBCannock, GBWalsall, GBWashington, GBGrays, GBWalton upon Thames, GBFinchley, GBThornton Heath, GBFarnborough, GBLoughborough, GBKensington, GBBoston, GBPaignton, GBWaterlooville, GBGuiseley, GBHornchurch, GBMaidenhead, GBMitcham, GBFeltham, GBStourbridge, GBRochester, GBDewsbury, GBWoking, GBActon, GBTwickenham, GBRuncorn, GBWrecsam, GBWidnes, GBMargate, GBEllesmere Port, GBBangor, GBTaunton, GBWallasey, GBHalesowen, GBBracknell, GBBarking, GBSutton, GBMerthyr Tudful, GBEdgware, GBRuislip, GBStreatham, GBRoyal Tunbridge Wells, GBBebington, GBAldershot, GB
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⚠️ Daylight Saving Time Affects This Pair
| Timezone | DST? | Standard | Daylight |
|---|---|---|---|
| Asia/Kolkata | No | UTC+5:30 | — |
| Europe/London | Yes | UTC+0 | UTC+1 |
During DST periods the time difference between these zones may be 4 hours 30 minutes instead of 5 hours 30 minutes. Always verify the current offset if scheduling calls near clock-change dates.