Why do I need decimal hours?

Many payroll and billing systems store time as decimal hours instead of hh:mm. Converting prevents entry errors.

How do I convert decimal hours back to hours and minutes?

Multiply the decimal by 60 to get minutes, then split into hours and remaining minutes (e.g., 1.75 hours → 1 hour 45 minutes).

Can I include seconds?

Yes. Convert seconds to minutes (seconds ÷ 60) and add to the minutes field before calculating.

Does this round my time?

No. It provides exact conversions. Round the decimal to match your policy, such as two decimals or 6-minute increments.

Is this the same as decimal days?

No. This only converts within hours/minutes. For days, divide total hours by 24.

time calculator

Decimal Hours Calculator

Convert hours and minutes to decimal hours and total minutes.

Results

Decimal hours: 2.50
Total minutes: 150.00

How to use this calculator

Enter hours and minutes.
See decimal hours for timesheets and total minutes for quick math.
Round the result yourself to match any employer or client policy (e.g., 2 decimal places).

Inputs explained

Hours: Whole hours portion of the time worked or recorded.
Minutes: Minutes portion that needs conversion to decimal hours.

How it works

Decimal hours = hours + minutes ÷ 60.

Total minutes = hours × 60 + minutes.

Formula

Decimal = H + (M/60)
Minutes = (H × 60) + M

When to use it

Entering time into systems that require decimals instead of hh:mm.
Converting stopwatch readings to decimal hours for billing or payroll.
Checking if manual spreadsheet conversions are correct.

Tips & cautions

Keep an eye on rounding—many payroll systems round to 2 decimals (hundredths of an hour).
If you have seconds, convert them to minutes first (30 seconds = 0.5 minutes).
Use total minutes when adding multiple time entries together quickly.
No automatic rounding rules (e.g., 6-minute increments); apply your own policy.
Not a date/time calculator—doesn’t account for time zones or clock times.

Worked examples

2 hours 30 minutes

Decimal = 2.50
Minutes = 150

1 hour 45 minutes

Decimal = 1.75
Minutes = 105

Deep dive

This decimal hours calculator converts hours and minutes into decimal hours and total minutes for timesheets. Enter hh:mm to get the decimal format many payroll and billing tools require.

Use it to avoid spreadsheet mistakes when invoicing clients, logging PTO, or adding stopwatch times. Apply your own rounding rules to match your employer or accounting system.

FAQs

Why do I need decimal hours?: Many payroll and billing systems store time as decimal hours instead of hh:mm. Converting prevents entry errors.
How do I convert decimal hours back to hours and minutes?: Multiply the decimal by 60 to get minutes, then split into hours and remaining minutes (e.g., 1.75 hours → 1 hour 45 minutes).
Can I include seconds?: Yes. Convert seconds to minutes (seconds ÷ 60) and add to the minutes field before calculating.
Does this round my time?: No. It provides exact conversions. Round the decimal to match your policy, such as two decimals or 6-minute increments.
Is this the same as decimal days?: No. This only converts within hours/minutes. For days, divide total hours by 24.

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