IST to EST Converter

Convert time between India Standard Time (IST) and Eastern Standard Time (EST)

India Standard Time (IST)

17:56:35
Nov 11, 2025
UTC

Eastern Standard Time (EST)

17:56:35
Nov 11, 2025
UTC

Time Difference

Eastern Standard Time (EST) is 0 hours ahead of India Standard Time (IST)

Select Date

Select Time

Quick Reference

ISTEST
07:3021:00
09:3023:00
11:3001:00
13:3003:00
15:3005:00
17:3007:00
19:3009:00
21:3011:00
23:3013:00
01:3015:00
03:3017:00
05:3019:00

Related Time Zone Conversions

EST to MST MST to EST EST to PST EST to PDT PST to EST EST to CST

About IST to EST Time Conversion

Converting time between India Standard Time (IST) and Eastern Standard Time (EST) is essential for coordination between India and the US East Coast. IST is UTC+5:30, while EST is UTC-5, making IST 10.5 hours ahead of EST.

This conversion is crucial for business operations, outsourcing coordination, software development collaborations, and personal communications between the United States East Coast and India. India does not observe daylight saving time, so IST remains constant throughout the year while EST transitions to EDT. This means the time difference can be 10.5 hours (when EST is active) or 9.5 hours (when EDT is active).

Common Use Cases for IST to EST Conversion

Business & Work

  • Scheduling meetings with US East Coast business partners and teams
  • Coordinating IT and software development with American companies
  • Managing US customer support and operations from India
  • Planning conference calls with distributed teams across India and US East Coast

Personal & Travel

  • Coordinating with family and friends in the United States
  • Planning travel to the US East Coast
  • Scheduling virtual events and online meetings with US participants
  • Coordinating online classes or training sessions across time zones

Time Zone Information

India Standard Time (IST)

  • UTC Offset: UTC+5:30 (no daylight saving)
  • IANA Timezone: Asia/Kolkata
  • Daylight Saving: No daylight saving time
  • Major Cities: New Delhi, Mumbai, Bangalore, Hyderabad, Chennai, Kolkata
  • Coverage: Entire India

Eastern Standard Time (EST)

  • UTC Offset: UTC-5 (UTC-4 during EDT)
  • IANA Timezone: America/New_York
  • Daylight Saving: Second Sunday in March to First Sunday in November
  • Major Cities: New York, Philadelphia, Atlanta, Miami, Boston, Washington DC
  • Coverage: Eastern United States and Eastern Canada

Quick Reference: IST to EST

9:00 AM IST
11:30 PM EST (previous day)
12:00 PM IST
2:30 AM EST (same day)
3:00 PM IST
5:30 AM EST
6:00 PM IST
8:30 AM EST

Remember: IST is always 10.5 hours ahead of EST (or 9.5 hours when EDT is active)

Frequently Asked Questions

What is the time difference between IST and EST?

IST (India Standard Time) is UTC+5:30 and EST (Eastern Standard Time) is UTC-5, making IST 10.5 hours ahead of EST. When the US observes EDT (Eastern Daylight Time at UTC-4) during summer, the difference reduces to 9.5 hours since India does not observe daylight saving time. IST remains constant year-round at UTC+5:30.

Does India observe daylight saving time?

No, India does not observe daylight saving time. IST (UTC+5:30) remains constant throughout the year. This means the IST to EST difference changes from 10.5 hours (when EST is active from November to March) to 9.5 hours (when EDT is active from March to November). This makes planning meetings with India more predictable than with other international locations.

When is the best time to schedule a meeting between India and US East Coast?

Finding overlap is challenging due to the large time difference. Early morning hours in India (around 6-9 AM IST) correspond to late evening previous day in the US East (around 8-11 PM EST). Alternatively, late afternoon/evening in India (5-8 PM IST) works for early morning in the US (6-9 AM EST). Best practice is to rotate meeting times to share the inconvenience equally between teams.

Why is IST to EST conversion important?

This conversion is essential for India-US business coordination, especially in IT services, business process outsourcing (BPO), software development, customer support, and remote work. Understanding the time difference helps schedule meetings, coordinate deliverables, manage handoffs, and maintain efficient communication between Indian and US East Coast teams.

How do I calculate IST to EST conversion manually?

Subtract 10.5 hours from IST time to get EST time (or subtract 9.5 hours when EDT is active). For example, 12:00 PM IST - 10.5 hours = 1:30 AM EST (same day). If the result is negative, add 24 hours and subtract 1 from the date to get the previous day. For instance, 8:00 AM IST - 10.5 hours = -2.5 hours, which equals 9:30 PM EST the previous day.

What are the major cities in IST and EST zones?

IST covers all of India including New Delhi (national capital), Mumbai (financial center), Bangalore (tech hub), Hyderabad (IT services), Chennai (manufacturing), and Kolkata. EST covers major US East Coast cities including New York, Philadelphia, Atlanta, Miami, Boston, and Washington DC. These cities represent major economic and technology centers.

Pro Tips

  • • Remember that India doesn't observe daylight saving time, so IST is constant. The difference changes when the US transitions between EST and EDT.
  • • Early morning India time (6-9 AM IST) works best for meetings with US evening (8-11 PM EST), but this requires Indian teams to start early.
  • • Asynchronous communication (emails, documentation, recorded videos) is often more efficient than synchronous meetings due to the large time gap.
  • • Use tools like Google Calendar that automatically display both time zones to avoid scheduling confusion.
  • • When negotiating meeting times, consider that rotating meeting times weekly ensures fairness in sharing the inconvenience.
  • • India Standard Time is exactly UTC+5:30 (not a round hour), which is unique among major time zones and should be carefully handled in calculations.

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Capacitor Value Calculator
Convert capacitor marking codes to values in pF, nF, and µF. Support for 3-digit codes, tolerance letters, and reverse lookup from value to code.
Wire Gauge Converter
Convert between AWG, millimeters, inches, square mm, square inches, and circular mils. Complete AWG chart with current ratings and resistance values.
Wave Frequency Calculator
Calculate wave frequency, wavelength, and speed using f=v/λ. Support for electromagnetic waves, sound waves, and custom mediums with unit conversions.
Fourier Series Visualizer
Interactive tool for visualizing Fourier series decomposition with real-time coefficient calculation, animation, and function approximation for signal analysis.
Sampling & Nyquist Calculator
Calculate Nyquist rate, check sampling sufficiency, analyze aliasing, and compute oversampling ratios for signal processing applications.
Beam Deflection Calculator
Calculate maximum deflection for simply supported and cantilever beams with point loads or distributed loads. Includes structural engineering formulas and design guidelines.
Bolt Torque Calculator
Calculate proper tightening torque for bolts based on material grade, preload requirements, and friction coefficients. Includes safety checks and engineering formulas.
Gear Ratio Calculator
Free professional gear ratio calculator for mechanical engineering. Calculate speed reduction, torque multiplication, compound gear trains, and mechanical advantage with real-time formulas and step-by-step solutions.
Molar Mass Calculator
Calculate molar mass and analyze chemical formulas with detailed elemental breakdown. Supports complex formulas, hydrates, parentheses, and provides mass percentages for chemistry applications.
Ideal Gas Law Calculator
Calculate pressure, volume, temperature, or moles using the ideal gas law (PV = nRT). Free calculator with multiple units, step-by-step solutions, and educational content for chemistry and physics.
Op-Amp Calculator
Calculate operational amplifier circuit parameters for inverting, non-inverting, differential, and integrator/differentiator configurations. Include gain, input/output impedance, and bandwidth calculations.
Heat Transfer Calculator
Calculate heat transfer rates for conduction, convection, and radiation. Include thermal resistance, heat exchanger analysis, and cooling calculations for engineering applications.
Transformer Turns Calculator
Calculate transformer turns ratios, primary/secondary voltages, currents, and power relationships. Include step-up/step-down calculations, impedance transformation, and efficiency calculations.
Power Electronics Calculator
Design and analyze DC-DC converters (buck, boost, buck-boost), calculate switching frequencies, inductor/capacitor values, and efficiency for power supply design.
Motor RPM Calculation
Calculate motor rotational speed from Hall-effect sensors, encoders, tachometers, and back-EMF measurements. Includes filtering, calibration, and performance analysis for motor control applications.
KVAR Calculator
Calculate required reactive power (KVAR) for power factor correction, capacitor bank sizing, and energy savings analysis for electrical systems and industrial applications.
HP to kW Motor Converter
Convert between horsepower (HP) and kilowatts (kW) for mechanical, electrical, and metric motor ratings with efficiency and load adjustments for engineering applications.
mAh to Wh Converter
Convert battery capacity between milliamp-hours (mAh) and watt-hours (Wh). Calculate energy storage for batteries, power banks, and electronic devices.
kW to kWh Converter
Convert kilowatts (kW) to kilowatt-hours (kWh) and calculate energy consumption from power and time. Estimate electricity costs for appliances and devices.
kWh to Watts Converter
Convert kilowatt-hours (kWh) to watts and calculate average power consumption from energy and time. Understand device power ratings and energy usage patterns.

Screensaver

Black Screen
A free backlight bleed tester to check dead pixels, backlight bleeding. Test monitor, laptop, mobile screen or other display issues.
White Screen
Quickly detect dead pixels, screen flicker, or backlight bleed on any monitor with our advanced display testing tool.
Red Screen
Spot dead pixels, color uniformity issues, or backlight bleeding fast-ensure your screen quality with our pixel checker.
Green Screen
Instantly check for dead pixels, backlight bleed, or display defects to guarantee flawless screen performance.
Blue Screen
Test your monitor for dead pixels, backlight bleeding, and color inconsistencies in seconds with our display diagnostic tool.
Yellow Screen
Identify dead pixels, uneven backlighting, or screen defects easily-optimize your monitor's display quality now.
Purple Screen
Find and fix dead pixels, backlight bleeding, or display issues using our comprehensive screen testing solution.
Cyan Screen
Ensure perfect screen quality by detecting dead pixels, backlight bleed, and other monitor issues instantly.
Orange Screen
Diagnose dead pixels, backlight bleeding, or display problems quickly-improve your monitor's performance and viewing experience.
Pink Screen
Uncover dead pixels, backlight bleed, or screen defects fast with our user-friendly display testing tool.
Brown Screen
Verify your screen for dead pixels, backlight bleeding, or color issues to maintain top display performance.
Gray Screen
Easily detect dead pixels, backlight bleed, and other screen issues to ensure your display's optimal quality.
Lime Screen
Quickly identify and troubleshoot dead pixels, backlight bleeding, and display defects for a flawless viewing experience.
Time Screen
Display the local time on your screensaver, automatically adjusting to your current time zone for accurate, real-time clock display.
Date Screen
A screensaver that displays the current date and time. Real-time clock display on your desktop or device.
Clock Screen
Elegant clock screensaver displaying the current time with customizable styles, perfect for adding a sleek look to your screen.

Utilities

Webcam Tester
Quickly test your webcam and verify camera settings to ensure optimal video quality and proper device functionality.
Microphone Test
Test your microphone and verify settings to ensure clear audio quality and proper device performance for free.
Flashlight Tester
Test your flashlight and verify settings to ensure optimal lighting and proper device functionality for free.
Morse Code Translator
Free online Morse code generator. Convert text to Morse code, e.g.: SOS in morse code, and vice versa.
Cookie Manager
View, edit, and manage your browser cookies effortlessly to control privacy, enhance security, and customize your browsing experience.
Credit Card Number Validation
Validate credit card numbers using the Luhn algorithm to ensure they are valid and secure.
Online Tally Counter
Free online tally counter with multiple counters, labels, and total calculation. Perfect for counting, tracking, and tallying various items.
Spacebar Counter
Simple spacebar counter - press spacebar or click + button to count. Perfect for counting repetitions, events, or any activity.
Password Strength Tester
Test your password strength and learn how secure your password is. Get real-time feedback and tips to create stronger passwords.
Website Screenshot
Generate screenshots of websites by entering a URL, with options for different device viewports (mobile, tablet, desktop) and full-page captures.
Color Blindness Simulator
Simulate how colors appear to users with different types of color blindness to ensure designs are accessible to users with color vision deficiencies.
Weight Tracker
Track and compare weight progress for multiple users. Add, edit, and delete weight records with visual progress reports and user comparison.

Printable

Printable Calendar
Generate and download printable monthly calendars for any month and year. Perfect for planning, organizing, and printing.
January 2025 Calendar
Generate and download printable January 2025 Calendar. Perfect for planning, organizing, and printing.
February 2025 Calendar
Generate and download printable February 2025 Calendar. Perfect for planning, organizing, and printing.
March 2025 Calendar
Generate and download printable March 2025 Calendar. Perfect for planning, organizing, and printing.
April 2025 Calendar
Generate and download printable April 2025 Calendar. Perfect for planning, organizing, and printing.
May 2025 Calendar
Generate and download printable May 2025 Calendar. Perfect for planning, organizing, and printing.
June 2025 Calendar
Generate and download printable June 2025 Calendar. Perfect for planning, organizing, and printing.
July 2025 Calendar
Generate and download printable July 2025 Calendar. Perfect for planning, organizing, and printing.
August 2025 Calendar
Generate and download printable August 2025 Calendar. Perfect for planning, organizing, and printing.
September 2025 Calendar
Generate and download printable September 2025 Calendar. Perfect for planning, organizing, and printing.
October 2025 Calendar
Generate and download printable October 2025 Calendar. Perfect for planning, organizing, and printing.
November 2025 Calendar
Generate and download printable November 2025 Calendar. Perfect for planning, organizing, and printing.
December 2025 Calendar
Generate and download printable December 2025 Calendar. Perfect for planning, organizing, and printing.
January 2026 Calendar
Generate and download printable January 2026 Calendar. Perfect for planning, organizing, and printing.
February 2026 Calendar
Generate and download printable February 2026 Calendar. Perfect for planning, organizing, and printing.
March 2026 Calendar
Generate and download printable March 2026 Calendar. Perfect for planning, organizing, and printing.