Anyone who has ever filled out a timesheet knows the pain: you worked 7 hours and 45 minutes, but your payroll system wants the answer in decimals. Is that 7.45? 7.75? Get it wrong and you're either underpaying yourself or confusing HR.

I built Time to Decimal Calculator (a free online time to decimal calculator) to solve exactly this — no signup, no app download, works right in the browser.

What it does
Type in hours, minutes, and seconds, and the tool instantly converts standard time into decimal hours and decimal minutes. It also shows the step-by-step math, so you actually understand the conversion instead of blindly trusting a black box. A complete conversion table (every 5 minutes across a full 24-hour day) is included on the page, so you can look up any value without even using the calculator.

The reverse direction, too
Decimal hours are useful, but sometimes you need to go the other way — turning 8.5 hours back into "8:30 AM to 5:00 PM." The site has a dedicated decimal to time converter for exactly that, useful for reading timesheet exports and scheduling.

For longer spans
What about projects billed by the day? If a client pays for 2.5 days of work, how many hours is that? There's a separate days to hours calculator that handles day-to-hour (and day-to-minute, day-to-second) conversions with the same one-click simplicity.

Why I built it
Most tools that do this are buried inside bloated payroll software or covered in ads. I wanted something clean, fast, and free — the kind of page you can bookmark and open in two seconds during invoice week.

Try it at https://www.timetodecimal.online/ — if it saves you even one payroll mistake, it's done its job.