Decimal Hours Converter
Convert HH:MM:SS to decimal hours — or decimal hours back to time — instantly, with a real-time visual gauge. Built for payroll, invoicing, and timesheets that need to be right the first time.
Calculation
7 + (30 ÷ 60) + (0 ÷ 3600) = 7.50 hours
Both fields are live — edit either side and the other updates instantly. No “Calculate” button needed.
Live diagram
The ring fills to 7.50 of a 12-hour scale, updating as you type.
Recent conversions
Nothing saved yet. Use the Save button to keep a conversion here for quick reuse.
Truly two-way
Type a time or type a decimal — either field updates the other live, with a radial diagram tracking the value in real time.
Batch conversion
Paste a whole list of times from a spreadsheet or text message and get every line converted at once, with a running total.
Built for payroll math
Multiply decimal hours by an hourly rate and get the right number. Quarter-hour and tenth-hour rounding included.
Common minutes-to-decimal conversions
The values people look up most often. Need every minute from 0 to 60? View the full chart →
| Minutes | Decimal Hours |
|---|---|
| 15 min | 0.2500 |
| 30 min | 0.5000 |
| 45 min | 0.7500 |
| 60 min | 1.0000 |
From the blog
All guides5 Common Decimal Hours Mistakes (and How to Catch Them)
The same handful of errors show up in almost every decimal-hours mistake — most of them from treating minutes like cents.
2 min readFreelancer Invoicing: Billing in Decimal Hours Without Shortchanging Yourself
Clients want a clean number on an invoice line. Here's how to convert logged time to decimal hours without quietly rounding away your own billable minutes.
2 min readRounding Rules for Timesheets: Quarter-Hour, Tenth, or Exact?
Three common ways to round decimal hours on a timesheet, what each one is built for, and where each one can quietly cost or save money.
2 min readFrequently asked questions
Divide the minutes by 60. 30 minutes ÷ 60 = 0.5 hours. 45 minutes ÷ 60 = 0.75 hours. For a full HH:MM:SS time, add hours + (minutes ÷ 60) + (seconds ÷ 3600).
Decimal hours are a fraction of 60 minutes, not a fraction of 100. 15 minutes is a quarter of an hour, so it becomes 0.25 — the same logic that makes 30 minutes 0.5 and 45 minutes 0.75. Treating minutes like cents (0.15, 0.45) is the most common payroll mistake this tool exists to prevent.
Standard time (HH:MM:SS) splits each hour into 60 minutes and each minute into 60 seconds. Decimal time expresses the same duration as a single number of hours, so it can be added, multiplied by an hourly rate, or summed across a timesheet without manual base-60 math.
It depends on your pay policy. Many employers round punches to the nearest quarter hour (0.25) for simplicity, while exact decimals are more common for hourly contractors billing to the minute. This site's converter and timesheet calculator both support exact values and quarter-hour rounding — pick whichever your policy requires.
Multiply decimal hours by the hourly rate. 7.75 decimal hours at $20/hour = $155.00. This only works cleanly with decimal hours — multiplying 7:45 (HH:MM) by an hourly rate directly gives the wrong answer, which is exactly the error decimal conversion avoids.
Yes. The timesheet calculator's clock-in/clock-out mode automatically adds 24 hours when a clock-out time is earlier than the clock-in time, so a 22:00–06:00 overnight shift correctly comes out to 8 hours.