How Many Hours Is 8am to 4pm?

8 hours
= 8.00 in decimal hours
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What about lunch?

Deducting an unpaid lunch break changes your paid hours:

Lunch breakPaid hoursDecimal
None8 hours8.00
20 min *7h 40m7.67
30 min7h 30m7.50
45 min7h 15m7.25
60 min7 hours7.00