{"id":43169,"date":"2026-11-03T17:29:13","date_gmt":"2026-11-03T17:29:13","guid":{"rendered":"https:\/\/mp.moonpreneur.com\/math-corner\/?p=43169"},"modified":"2026-11-03T17:39:59","modified_gmt":"2026-11-03T17:39:59","slug":"1-hour-and-20-minutes-in-decimal-form","status":"publish","type":"post","link":"https:\/\/mp.moonpreneur.com\/math-corner\/1-hour-and-20-minutes-in-decimal-form\/","title":{"rendered":"What Is 1 Hour and 20 Minutes in Decimal Form?"},"content":{"rendered":"\t\t
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You are filling in a timesheet, and the system asks for hours in decimals. Your shift lasted 1 hour and 20 minutes<\/strong>. Do you type 1.20? Stop right there, because that is one of the most common time conversion mistakes.<\/p>\r\n

So, what is 1 hour 20 minutes in decimal?<\/strong> The answer is 1.33 hours<\/strong> (rounded to two decimal places).<\/p>\r\n

Let's look at why, and how you can work this out for any time value without a calculator headache.<\/p>\r\n <\/div>\r\n\r\n \r\n

\r\n The Quick Answer: 1 Hour 20 Minutes in Decimal\r\n <\/h2>\r\n\r\n \r\n
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1 HOUR + 20 MINUTES IN DECIMAL FORM<\/p>\r\n

1.33 Hours<\/div>\r\n
<\/div>\r\n

80 minutes \u00f7 60 = 1.3333...<\/p>\r\n

Rounded to 2 decimal places<\/p>\r\n <\/div>\r\n\r\n

The exact value is 1.3333...<\/strong> with the 3 repeating forever, but most payroll, billing, and invoicing systems round it to 1.33.<\/p>\r\n\r\n \r\n

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TOTAL MINUTES<\/div>\r\n
80<\/div>\r\n
60 + 20 minutes<\/div>\r\n <\/div>\r\n
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DECIMAL HOURS<\/div>\r\n
1.33<\/div>\r\n
Hours (rounded)<\/div>\r\n <\/div>\r\n <\/div>\r\n\r\n \r\n

\r\n Why Is 1 Hour 20 Minutes Not 1.20 in Decimal?\r\n <\/h2>\r\n\r\n

This is where most people slip up. Our everyday clock runs on a base-60 system: one hour has 60 minutes. Decimals, however, run on a base-10 system, where each unit is split into tenths and hundredths.<\/p>\r\n\r\n

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The Common Conversion Mistake<\/h3>\r\n

When you write 1.20, a decimal system reads it as 1 hour and 20 hundredths of an hour.<\/p>\r\n

\r\n
0.20 \u00d7 60 = 12 minutes<\/div>\r\n

So, 1.20 hours actually means 1 hour and 12 minutes.<\/p>\r\n <\/div>\r\n <\/div>\r\n\r\n

That is 8 minutes short of what you actually worked. Over a week of shifts, those missing minutes add up to real money.<\/p>\r\n\r\n \r\n

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Remember This Golden Rule<\/div>\r\n

The number after the decimal point is a fraction of an hour, not a count of minutes.<\/p>\r\n <\/div>\r\n\r\n<\/div>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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\r\n How to Write 1 Hour and 20 Minutes in Decimal (Step by Step)\r\n <\/h2>\r\n\r\n

Wondering how to write 1 hour and 20 minutes in decimal yourself? Follow these three easy steps.<\/p>\r\n\r\n \r\n

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Step 1: Keep the Whole Hours<\/div>\r\n

You have 1 full hour, so your whole number is 1<\/strong>.<\/p>\r\n <\/div>\r\n\r\n \r\n

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Step 2: Divide the Minutes by 60<\/div>\r\n

Take the leftover minutes and divide them by 60:<\/p>\r\n

\r\n 20 \u00f7 60 = 0.3333...\r\n <\/div>\r\n <\/div>\r\n\r\n \r\n
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Step 3: Add the Two Parts Together<\/div>\r\n

Combine the whole hours and the decimal minutes:<\/p>\r\n

\r\n 1 + 0.3333 = 1.3333\r\n <\/div>\r\n

This rounds to 1.33 hours<\/strong>.<\/p>\r\n <\/div>\r\n\r\n \r\n

The Formula<\/h3>\r\n\r\n
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Use This Simple Formula<\/div>\r\n
\r\n Decimal Hours = Hours + (Minutes \u00f7 60)\r\n <\/div>\r\n <\/div>\r\n\r\n

Plug in your own numbers, and you can convert any duration into decimal hours.<\/p>\r\n\r\n \r\n

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A Shortcut<\/h3>\r\n

Since 20 minutes is exactly one-third of an hour (20 \u00f7 60 = 1\/3), you can remember that 20 minutes is always 0.33 hours<\/strong> as a rounded value. Add the whole hours, and you are done.<\/p>\r\n

\r\n 1 Hour + 0.33 = 1.33 Hours<\/span>\r\n <\/div>\r\n <\/div>\r\n\r\n \r\n

\r\n 1 Hour 20 Minutes in Decimal: Real-Life Examples\r\n <\/h2>\r\n\r\n

Numbers feel more meaningful when you see them in action. Here is how 1.33 hours plays out in common situations.<\/p>\r\n\r\n \r\n

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\r\n Example 1: Calculating Pay\r\n <\/div>\r\n
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Suppose you earn $15 per hour and worked 1 hour and 20 minutes.<\/p>\r\n