What is 1 hour 45 minutes in decimal?

1.75 hours. Forty-five minutes divided by sixty is 0.75, plus the one whole hour. Multiply 1.75 by your hourly rate to get the amount to bill.

Is 0.5 hours thirty minutes or fifty minutes?

Thirty minutes. Decimal hours are fractions of an hour, so 0.5 is half of sixty minutes. Fifty minutes would be 0.83 hours.

How many decimal places should I use on an invoice?

Two is the convention. It is precise to the nearest 36 seconds, which is far finer than any billing increment. Rounding to one decimal place only makes sense when you bill in six-minute increments, because each tenth is exactly six minutes.

Should I round up or round to nearest?

Most engagement letters that specify increments say work is billed to the next increment, meaning round up. If yours does not say, rounding to the nearest increment is the fairer reading and the easier one to defend. Say which you use and stick to it.

Timer

MVP

Free Tool

Time to Decimal Converter

Hours and minutes to decimal hours for invoices and payroll, with rounding to six, fifteen and thirty minute increments.

Hours and minutes to decimal

Hours

Minutes

Exact decimal hours

2.67

6-min rounded

2.70

2:42

15-min rounded

2.75

2:45

30-min rounded

3.00

3:00

Decimal hours to hours and minutes

2:40

Minutes to decimal chart

Minutes	Decimal	6-min increment	15-min increment
5 min	0.08	0.1	0.25
10 min	0.17	0.2	0.25
15 min	0.25	0.3	0.25
20 min	0.33	0.4	0.50
25 min	0.42	0.5	0.50
30 min	0.50	0.5	0.50
35 min	0.58	0.6	0.75
40 min	0.67	0.7	0.75
45 min	0.75	0.8	0.75
50 min	0.83	0.9	1.00
55 min	0.92	1.0	1.00
60 min	1.00	1.0	1.00

How do you convert minutes to decimal hours?

Divide the minutes by 60. Fifteen minutes is 15 divided by 60, which is 0.25 hours. Forty minutes is 0.67 hours. Add the whole hours back on and you have the decimal figure an invoice or payroll system expects. So 2 hours and 40 minutes is 2.67 hours.

The mistake people make is treating the minutes as if they were already decimal. 2:30 is not 2.30 hours, it is 2.50. On a $150 an hour invoice that mistake is $30 per entry, always in the client's favour.

Why do invoices and payroll use decimal hours?

Because money is decimal. Multiplying 2.67 hours by a rate is one step. Multiplying 2 hours 40 minutes by a rate means converting first anyway. Accounting software, payroll providers and most invoicing tools store time as a decimal for that reason.

Time tracking tools usually show you hours and minutes because that is how people think, then convert to decimal on the report. TimerMVP does both: sessions display as hours and minutes, and reports carry the decimal value with the exact seconds behind it.

What about rounding to six or fifteen minute increments?

Many professionals bill in increments. Lawyers commonly use six-minute increments, which is a tenth of an hour, so every entry rounds up to the next 0.1. Agencies and consultants often use fifteen minutes, a quarter of an hour. The converter above shows the exact decimal next to the rounded figure for both.

Whatever increment you use, write it into your engagement letter and apply it consistently. In TimerMVP the billing increment is a setting on each client, so a law firm client can round to six minutes while a retainer client bills exact time, and the reports respect each one automatically.

6 minutes = 0.1 hour, the standard legal increment
15 minutes = 0.25 hour, common for agencies and consultants
30 minutes = 0.5 hour, typical for coaching and sessions
Exact time: no rounding, every second counts

Never convert by hand again.

TimerMVP records every session to the second, applies each client's billing increment, and puts the decimal hours on the report for you.

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