Comparing times is a percentage question in disguise: how much of a working day you spend in meetings, what share of a project has elapsed, or how far through a year you are. Because the two durations can be entered in different units, the calculator converts them before dividing.
How to use the Time Percentage Calculator
- First time duration
- Second time duration
Results update as you type, and everything is calculated in your browser.
How it works
Both durations are converted to seconds, divided and multiplied by 100. The remaining time and its percentage are shown as well.
Inputs explained
| Field | What to enter |
|---|---|
| First time duration | Units: min, ms, s, h, days, weeks … |
| Second time duration | Units: h, ms, s, min, days, weeks … |
What each result means
- Percentage = [First time duration]÷[Second time duration]×100
- Remaining time = [Second time duration] – [First time duration]
- Remaining percentage = 100 – [First time duration]÷[Second time duration]×100
Example values
How the main result changes when First time duration changes and everything else stays at the example values above:
| First time duration (min) | Percentage (%) |
|---|---|
| 0.375 | 1,125 |
| 0.5625 | 1,687.5 |
| 0.75 | 2,250 |
| 0.9375 | 2,812.5 |
| 1.13 | 3,375 |
| 1.5 | 4,500 |
Formula
Percentage = first duration ÷ second duration × 100
Worked example
Inputs — First time duration: 0.75 min; Second time duration: 0.000555556 h.
Results — Percentage = 2,250 %; Remaining time = -0.7167 min; Remaining percentage = -2,150 %.
Key terms
- Duration
- A length of time.
Frequently asked questions
What percentage of an hour is 15 minutes?
15 ÷ 60 × 100 = 25%.
What percentage of a day is 8 hours?
8 ÷ 24 × 100 = 33.33%.
How long is a month in this calculator?
An average Gregorian month, 30.44 days; a year is 365.2425 days.
Can the first time be longer than the second?
Yes – the percentage is then above 100%.