7:30
hours : minutes
Convert between decimal hours and HH:MM — free, no sign-up, nothing leaves your browser.
The most common mistake when converting by hand is treating the decimal part like it's already in minutes — reading ".5" as "50" instead of converting it properly. Minutes run on a 60-based system, not a 100-based one, so the decimal fraction of an hour has to be multiplied by 60 to get minutes: 0.5 hours is 0.5 × 60 = 30 minutes, giving 7:30, not 7:50. The same logic applies at any fraction — 0.25 hours is 15 minutes, 0.75 hours is 45 minutes — which is also why payroll systems use decimal hours in the first place: they're easier to add and multiply by a pay rate than clock time is, even though they don't match how people naturally think about a workday.
Timesheets and payroll systems often record hours as decimals (like 7.5), while people naturally think in clock time (7:30) — this converts between the two so you don't have to do the mental maths.
Yes — enter or convert numbers like 42.5 hours and it correctly shows 42:30, without wrapping back to zero at 24 hours.
Exactly 6 minutes (0.1 × 60), which is why some timesheets round to the nearest tenth of an hour — each tenth is a clean 6-minute increment.
No. Everything is calculated locally in your browser — nothing you enter is sent to a server.