Time Converter

Time Converter: Convert Hours, Minutes, Decimals, Time Zones, and Unix Timestamps Free

Add up 7:45 and 6:30 in your head and you will probably land on 13:75 — which is wrong, because clock time is base 60, not base 10. That single quirk is why timesheets drift, why a "9 a.m. their time" call gets booked for the wrong hour, and why a Unix timestamp in a log file looks like a phone number. The Time Converter on Tools Hub fixes all of it in one place: a free, all-in-one calculator that turns one representation of time into another in a single click.

One page covers six jobs that are usually scattered across six different sites. Use it as a time converter to decimal for a payroll timesheet, a military to standard time converter for reading a 24-hour clock, a minutes to hours roll-up for a project log, a time zone converter to line up a call between New York and Sydney, or a Unix epoch time converter for a database timestamp. There is nothing to install, no account to create, and no cap on how many conversions you run. You type a value, pick the formats, and get an exact, copy-ready result you can paste straight into a spreadsheet, invoice, calendar invite, or code editor.

How to Use the Time Converter

The tool is built so you can convert time in seconds without reading a manual. Here is the full workflow from start to finish:

1. Open the Time Converter page on Tools Hub in any browser. It loads instantly.
2. Pick the conversion type from the mode selector: time-to-decimal, decimal-to-time, minutes-to-hours, military-to-standard, time-zone, or Unix timestamp. Each mode shows only the fields relevant to that task so nothing is cluttered.
3. Enter your source value. For a clock time, type the hours and minutes (for example, 7:45). For a decimal value, type a number such as 7.75. For a timestamp, paste the Unix number such as 1717286400.
4. Choose the input and output units or zones. If you are using the time zone converter, select the "from" zone (such as EST) and the "to" zone (such as IST). For decimal work, choose whether the result is rounded to two decimals or kept exact.
5. Read the result instantly. The converted time appears as you type — there is no separate "convert" button to hunt for, though one is available if you prefer to trigger it manually.
6. Copy the output with the one-tap copy button and paste it into your timesheet, invoice, spreadsheet, calendar, or code. The value is plain text, so it pastes cleanly everywhere.
7. Convert again as many times as you like. Nothing resets unexpectedly and there is no daily cap, so you can batch through an entire week of entries in one sitting.

Because the calculation happens directly in your browser, results appear the moment you finish typing. You never wait on a server, and your numbers never leave your device.

Time Formats Explained: Decimal vs. Clock vs. 24-Hour vs. Unix

To use any time converter calculator confidently, it helps to understand the formats it bridges. They look similar but mean very different things, and mixing them up is the most common cause of payroll and scheduling mistakes.

Clock time (hours and minutes)

This is the everyday format: 8:15, 12:30, 7:45. Minutes run from 0 to 59 and then roll over into the next hour. The catch is that this is base 60, not base 10. That is exactly why you cannot simply add 7:45 and 6:30 as if they were decimals — 45 plus 30 is 75 minutes, which is 1 hour 15 minutes, not "1.75". A time converter does this carrying for you automatically.

Decimal hours

Decimal hours express minutes as a fraction of an hour. Fifteen minutes is 0.25, thirty minutes is 0.5, and forty-five minutes is 0.75. This is the format payroll systems, accounting software, and billing platforms prefer because decimals add and multiply cleanly: 7.5 hours times a $40 rate is exactly $300. The time converter to decimal and the reverse decimal to minutes conversion are the two halves most people toggle between.

24-hour (military) time

Military time, or 24-hour time, counts hours from 00:00 (midnight) to 23:59, with no AM or PM. So 1:00 PM becomes 13:00 and 11:00 PM becomes 23:00. It removes the ambiguity of AM/PM and is standard in aviation, healthcare, the military, transit schedules, and most of the world outside the United States. The military to standard time converter translates in both directions so you can read any clock.

Unix timestamps (epoch time)

A Unix timestamp is a single large number counting the seconds that have elapsed since midnight UTC on January 1, 1970 — a moment called the "epoch." A value like 1717286400 is not random; it is a precise instant. Computers love this format because it is just one integer, easy to store and compare. Humans cannot read it at a glance, which is why a Unix epoch time converter is essential for developers reading logs, API responses, and database records.

Time zones and offsets

Every zone is defined by its offset from Coordinated Universal Time (UTC). EST is UTC-5, IST is UTC+5:30, CST is UTC-6, and CET is UTC+1. A time zone converter applies the difference between two offsets — and accounts for the half-hour offset that trips people up when converting to or from India Standard Time. Understanding offsets is what turns a confusing "what time is their 9 a.m. for me?" into a one-line answer.

Worked Examples You Can Check by Hand

The fastest way to trust a converter is to verify a few results yourself. Each example below shows the input, the math, and the output the tool produces, so you can confirm the engine matches the arithmetic.

Timesheet: 7 hours 38 minutes to decimal

Divide the minutes by 60: 38 / 60 = 0.6333. Add the whole hours: 7:38 = 7.6333 decimal hours. Rounded to two places for payroll, that is 7.63. At a $45 rate, the exact figure pays $285.00 versus $283.50 for the rounded one — a real $1.50 gap on a single day, which is why the tool shows both side by side.

Project log: 245 minutes to hours

245 / 60 = 4 with a remainder of 5, so 245 minutes = 4 hours 5 minutes, or 4.0833 decimal hours. Useful when a tracker spits out raw minutes and your report wants clean hours.

Scheduling: 9:00 AM EST to IST

EST is UTC-5 and IST is UTC+5:30, a 10.5-hour gap. Add 10 hours 30 minutes to 9:00 AM and you get 7:30 PM IST the same day. The half hour is the part hand-math almost always drops.

Debugging: timestamp 1717286400 to a date

That value resolves to Sat, 01 Jun 2024 00:00:00 UTC. Paste it into the Unix mode and you get both the UTC instant and your local-zone equivalent, so you can match it against a log line without counting seconds.

Aviation: 19:45 military to standard

For any hour past 12, subtract 12 and add PM: 19 − 12 = 7, so 19:45 = 7:45 PM. Going the other way, 7:45 PM + 12 = 19:45. The only special cases are 12:00 (noon stays 12:00 PM) and 00:00 (midnight becomes 12:00 AM).

Time Zone Conversions in Depth

The world clock and time zone converter portion of this tool is the one people use most for coordinating across continents. A few practical notes make it far more useful.

The most-searched pairs — EST to IST, CST to IST, IST to CET, and London to New York — all involve large offsets, and IST adds a 30-minute wrinkle. For example, when it is 9:00 AM EST, it is 7:30 PM IST the same day, because India is 10.5 hours ahead of the US Eastern zone in standard time. Getting this right by hand is genuinely hard; the converter does it reliably every time.

A second subtlety is daylight saving time. Many US and European zones shift by an hour in spring and autumn, while India and much of Asia never change, so the gap between New York and London is sometimes five hours and sometimes four. That is why a time converter by date beats a generic "right now" conversion for future meetings — convert using the actual meeting date so the DST status is correct.

A third trap: the date can flip across the line. Book a 10:00 PM call on the US West Coast with a colleague in Sydney and it lands around 3:00 PM the next day for them. A purely numeric offset hides that day change, so always read the full date the converter returns — not just the clock time — before you send the invite.

Decimal and Minute Conversions for Timesheets

For freelancers, contractors, and hourly employees, the time converter to decimal and the matching decimal to minutes calculator are the workhorses. Here is the logic the tool applies so you can sanity-check any result.

To convert minutes to a decimal fraction, divide the minutes by 60; to go back, multiply the fractional part by 60 (0.75 × 60 = 45, so 7.75 hours = 7:45). Rounding is where timesheets quietly drift: if your employer rounds to the nearest quarter hour, 0.333 might be logged as 0.25 or 0.33 depending on policy. The tool shows the exact value and a rounded value side by side so you can match whatever your payroll system expects and keep a month of invoices from drifting a few dollars.

The same engine doubles as a number to time converter: feed it a raw decimal like 5.5 and it returns 5:30, perfect for cleaning up an inconsistently entered spreadsheet column. A handy reference for the quarter-hour values almost everyone needs: 0.25 = 15 min, 0.50 = 30 min, 0.75 = 45 min, and the awkward thirds 0.33 ≈ 20 min and 0.67 ≈ 40 min.

Unix Timestamp Conversion for Developers

The Unix time converter mode is built for people who work with logs, APIs, and databases. Servers and programming languages almost universally store moments as epoch seconds (or milliseconds), and those integers are meaningless to human eyes.

Paste a value such as 1717286400 and the tool returns the corresponding date and time, both in UTC and in your local zone, so you can immediately tell when an event happened. Going the other way, you can enter a date and time to generate the timestamp to drop into a query, a config file, or a test fixture. A frequent gotcha is the difference between seconds and milliseconds: JavaScript, for instance, works in milliseconds (13-digit numbers) while many backends use seconds (10-digit numbers). If a converted date lands in 1970 or far in the future, you have almost certainly mixed up the two — divide or multiply by 1000 and try again. The converter flags suspiciously large or small values to help you catch this.

One more edge case worth knowing about: the year 2038 problem. Systems that store epoch time in a signed 32-bit integer overflow on 19 January 2038, wrapping to a negative number that reads as a 1901 date. If you ever convert a far-future timestamp and the result looks like the early 20th century, you are seeing that overflow, not a tool bug — the value itself has wrapped.

Privacy and Accuracy

This is a tool where privacy is genuinely built in, not just promised. Every calculation — decimal math, zone offsets, timestamp parsing — runs entirely inside your own browser using your device's clock and standard date libraries. No times, dates, or numbers you enter are uploaded to any server. That matters when the figures are tied to a client's project, your earnings, or a confidential system's logs.

On accuracy, the tool relies on the same internationally standardized offset and calendar rules that operating systems use, so its zone conversions and epoch calculations match what your phone and computer already show. For routine timesheet, scheduling, and development work it is exact. The one thing to double-check yourself is daylight saving status for far-future dates, since DST rules occasionally change by legislation — when in doubt, confirm the offset for the specific date of your meeting.

Tips and Troubleshooting

My decimal result has a long string of digits — is that wrong?

No. Some minute values produce repeating decimals, like 20 minutes = 0.333… or 10 minutes = 0.1667. That is mathematically correct. Use the rounded view if your payroll system only accepts two decimal places.

My time zone result is off by an hour

This is almost always daylight saving time. The offset between two zones changes when one of them springs forward or falls back. Make sure you are converting for the correct date, and confirm whether the destination observes DST at all — India and most of Asia do not.

The IST conversion looks half an hour off

That is expected. India Standard Time is UTC+5:30, a half-hour offset. Conversions like EST to IST and CST to IST will always include that extra 30 minutes — it is a feature of the zone, not an error.

My Unix timestamp converts to a date in 1970

You have likely pasted a seconds value into a milliseconds field or vice versa. A 10-digit number is seconds; a 13-digit number is milliseconds. Adjust by a factor of 1000 and reconvert.

Military time conversion shows the wrong half of the day

Remember that 12:00 is noon and 00:00 (or 24:00) is midnight. Hours 13:00 through 23:00 map to 1 PM through 11 PM. If you typed 24:30, use 00:30 instead, since the 24-hour clock resets at midnight.

The result didn't update after I changed a field

The converter recalculates as you type, but if a field is left empty or contains a non-numeric character it waits for valid input. Clear any stray letters or symbols and the result will refresh instantly.

Related Tools

If the Time Converter is useful, these other free Tools Hub utilities pair well with the same kinds of tasks:

• Age Calculator — work out an exact age in years, months, and days from a birth date, useful alongside date conversions.
• Date Difference Calculator — count the days, weeks, or months between two dates for deadlines and billing periods.
• Unix Timestamp Converter — a focused companion for developers who only need epoch-to-date conversions.
• Stopwatch and Timer — measure elapsed time directly, then bring the result here to convert into decimal hours.
• Word Counter — handy when you bill writing work by output and need to log time and volume together.
• Percentage Calculator — quickly apply rates and markups to the hours you've converted.

Frequently Asked Questions

Is the Time Converter free to use?

Yes, completely. The Time Converter is 100% free with no sign-up, no account, and no hidden limits. You can run as many conversions as you need, as often as you like, at no cost.

Do I need to create an account or install anything?

No. There is nothing to install and no registration. The tool runs in your web browser — just open the page and start converting.

How do I convert time to decimal hours?

Choose the time-to-decimal mode, enter your hours and minutes (for example 7:45), and the tool divides the minutes by 60 to give the decimal result (7.75). It also shows a rounded version to match payroll systems that accept only two decimals.

How do I convert military time to standard time?

Select the military-to-standard mode and enter the 24-hour value, such as 19:45. The converter returns the 12-hour equivalent with AM or PM (7:45 PM). It works in reverse too, turning 7:45 PM into 19:45.

Does the time zone converter account for daylight saving time?

Yes, it applies the correct offset for the date you convert, including daylight saving shifts where they apply. For meetings scheduled weeks ahead, convert using the actual meeting date so the DST status is accurate, and remember that zones like India Standard Time never change.

What is a Unix timestamp and how do I convert it?

A Unix timestamp is the number of seconds since January 1, 1970 UTC. Paste the number into the Unix mode and the tool shows the human-readable date and time in both UTC and your local zone. You can also enter a date to generate a timestamp. If your number has 13 digits it is in milliseconds rather than seconds.

Are my times and dates kept private?

Yes. All conversions happen locally in your browser. Nothing you type is sent to a server or stored, which keeps client hours, earnings, and system data confidential.

Can it convert minutes to hours?

Yes. Enter a total number of minutes and the converter returns the equivalent in hours and minutes (for example 195 minutes becomes 3 hours 15 minutes) as well as the decimal form (3.25 hours), so you can pick whichever your records require.

How do I convert a decimal back into minutes?

Use the decimal-to-time mode and enter the decimal value, such as 6.4. The tool multiplies the fractional part by 60, so 0.4 × 60 = 24, giving 6 hours 24 minutes. This is the reverse of the time-to-decimal calculation.