Time to Decimal Excel

What this does

A time in Excel is a fraction of a day, so 7:30 is stored as 0.3125. Multiplying by 24 converts it into hours, by 1440 into minutes, and by 86400 into seconds. The step people forget is the second one: the result cell inherits the source's time format, so 7.5 is displayed back as 12:00 until you set the cell to General or Number. Going the other way — decimal hours into a time — divide by 24 and format as time, or use =TIME(hours, minutes, 0) if the parts are in separate cells. Converting minutes to hours is the same operation viewed differently: if A2 holds a plain NUMBER of minutes rather than a time value, =A2/60 gives decimal hours, and =A2/1440 gives a time value you can format as h:mm. Whether to divide by 60 or by 1440 depends entirely on whether the cell holds a number or a time, which is why checking the alignment first is worth the second it takes. The same idea underpins a lot of everyday Excel work, so the few minutes spent getting it right here pay back across every sheet you build afterwards. Treat it as a pattern, not a one-off, and it stops being something you look up and starts being something you reach for. Treat “time to decimal excel” as a small repeatable workflow rather than a one-off click you hope to remember next time. Use a small test block before the live file, so any surprise in the affected cells shows up while it is still harmless. When a formula is involved, keep the inputs labelled beside it, reference cells instead of typing values, and apply number formatting only after the result checks out. That turns a workflow that saves repeating the same clicks every week into a method you can reuse, explain, and defend when the workbook leaves your screen.

A worked example

B2 holds the duration 7:30. =B2*24 formatted as Number with one decimal shows 7.5, ready to multiply by an hourly rate: =B2*24*C2 with a rate of 18.50 gives 138.75. In reverse, 7.5 in D2 back to a time: =D2/24 formatted as h:mm shows 7:30. And 135 plain minutes in E2: =E2/60 gives 2.25 hours, =E2/1440 formatted as h:mm gives 2:15. Every hourly-rate calculation needs the decimal form, and the ×24 is only half of it — the number format is what makes the answer readable. One habit worth forming early: name the cells that hold your inputs, so the formula reads in plain language instead of a string of cell addresses. A reviewer — or you in three months — can then follow the logic without decoding what B7 and D2 were supposed to mean, which is most of what makes a sheet maintainable.

In Google Sheets

Everything above works in Google Sheets too. Excel and Sheets share the formula syntax used here; only the surrounding menus are arranged differently. That portability is deliberate — learn it once and it follows you between the two tools and across Windows and Mac. The aim was to get you unstuck fast and leave you a little more capable than a copy-paste would. The answer is at the top, the tool proves it, and the detail above shows why it holds — so the next time a colleague asks, you can answer without reaching for search. Here is the takeaway for “time to decimal excel”: copy the answer if you are busy, but if you have a spare few minutes, rebuild the example in Excel yourself with the tool above open beside it. That single pass — type it, run it, watch the result move when you change an input — is what turns a formula you found into a technique you trust. Keep your inputs labelled and referenced, never hard-coded, and the same sheet stays correct and auditable as it grows. Done that way, you will not need to look this up again, and you will be the person others ask.

Common mistakes

• Forgetting to change the number format, so the correct answer is displayed back as a time.
• Multiplying a text "7:30" by 24 and getting #VALUE! — convert it to a real time first.
• Dividing by 60 when the cell holds a time value rather than a count of minutes.
• Rounding each row to two decimals and then totalling, which drifts from the total of the unrounded values.
• Paying against the raw time value, which is a fraction of a day and roughly 24 times too small.

Frequently asked questions