Hours and decimal hours

Seven and a half hours is 7.5, not 7.30. Type into either field and it converts.

A whole week with breaks, overtime and pay: time card calculator.

Minutes to decimal hours chart

Every minute from 1 to 60 as a decimal of an hour, rounded to two places. Print this page (Ctrl+P or ⌘P) and the chart prints without the menus.

Min	Decimal	Min	Decimal	Min	Decimal	Min	Decimal
1	0.02	16	0.27	31	0.52	46	0.77
2	0.03	17	0.28	32	0.53	47	0.78
3	0.05	18	0.30	33	0.55	48	0.80
4	0.07	19	0.32	34	0.57	49	0.82
5	0.08	20	0.33	35	0.58	50	0.83
6	0.10	21	0.35	36	0.60	51	0.85
7	0.12	22	0.37	37	0.62	52	0.87
8	0.13	23	0.38	38	0.63	53	0.88
9	0.15	24	0.40	39	0.65	54	0.90
10	0.17	25	0.42	40	0.67	55	0.92
11	0.18	26	0.43	41	0.68	56	0.93
12	0.20	27	0.45	42	0.70	57	0.95
13	0.22	28	0.47	43	0.72	58	0.97
14	0.23	29	0.48	44	0.73	59	0.98
15	0.25	30	0.50	45	0.75	60	1.00

Example: 7 hours 40 minutes = 7 + 0.67 = 7.67 decimal hours.

Where the mistake bites

Twelve minutes per person per day, across fifteen people, is close to sixty hours a year that somebody is over- or underpaid. In irot Time the balance is held in minutes and exported in decimals, so nobody converts anything by hand. How the export works.

Questions we get

Why is 7:30 not 7.30?

Because a clock counts in base 60 and payroll counts in base 10. Seven and a half hours is 7.5 decimal hours, not 7.30. It is the most expensive and most common mistake when hours go into a spreadsheet: thirty minutes silently becomes eighteen.

Which format does payroll want?

Almost always decimal hours, because it multiplies hours by an hourly rate. Send 7:30 and let the spreadsheet read it as 7.30 and you are twelve minutes out per person per day.

Is anything I type stored?

No. It is all calculated in your browser and nothing is sent to a server. Reload the page and the fields are empty again.

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Questions? Write to time@irot.com. We answer on working days, usually by the next one.