Decimal Hours Converter
Convert hours:minutes to decimal hours and back for a whole list — 7:30 → 7.5, 7h 20m → 7.33, 450 min — with optional rounding to 6- or 15-minute steps.
Every line as h:mm, decimal hours and minutes, the total both ways, the drift rounding introduced, and a CSV you can paste into payroll.
Example: Mon 7:30, Tue 7.25, Wed 7h 20m, 450 min → 7.50 + 7.25 + 7.33 + 7.50 = 29.58 h (29:35); rounded to the nearest 15 min the total is 29.50 h and the page shows the −0:05 drift.
Minutes ÷ 60,
and the rounding you choose.
How each line is read, what rounding does, and why 7.30 is not 7:30.
Reading a line
A duration may be clock style (7:30, 7:20:30), decimal hours (7.25), words (7h 20m, 45 min) or bare minutes (450 min), optionally after a label such as a day name. Each becomes minutes, then h:mm and decimal hours = minutes ÷ 60 — 7:30 is 7.5, 7:20 is 7.333…
Rounding
Payroll often rounds to tenths (6 min) or quarters (15 min). The page rounds each line to the increment with the rule you pick — nearest, up or down — and shows how far the rounded total drifts from the exact one. Whether rounding is permitted and which rule applies is your policy, not something the page decides.
7.30 versus 7:30
A decimal 7.30 means 7.3 hours = 7:18, not seven and a half. The output CSV keeps the original text next to both forms so a mistake is visible. Negative lines (−0:30 for an unpaid break) subtract. Nothing leaves the browser; the same four anonymous usage counts as the rest of the site apply.
SOURCES
- Decimal hours = minutes ÷ 60; rounding nearest / up / down to a chosen minute increment per line; policy is the user’s
Last reviewed 21 September 2026. How results are checked: How we verify.