How to use the time converter
This time converter lets you switch between common time units in one place. Choose the unit you are converting from and the unit you want to convert to, enter a non-negative value, and click "Convert" to see the result. A "Swap" button reverses the from and to units so you can check conversions in both directions without retyping. All conversions use the second as the base: every unit is defined relative to seconds, so the tool stays consistent and accurate.
Time conversion is useful in many situations. In programming, you often need to convert between milliseconds, seconds, and hours when handling timers or API responses. In science and engineering, experiments and processes are measured in seconds or smaller units, while schedules and plans use minutes, hours, and days. When you read that something takes 3600 seconds or 86400 seconds, converting to hours or days makes the duration easier to understand. Whether you are debugging code, doing homework, or planning your day, having a single tool that handles nanoseconds up to years saves time and reduces errors.
The converter runs entirely in your browser. There is no sign-up, no download, and no delay. It is designed to be mobile-friendly: the two-column layout stacks on small screens, inputs have a comfortable touch size, and the result appears next to your input so you can compare at a glance. Results are shown with up to six decimal places when needed. Note that months and years use standard approximations (30 days per month, 365 days per year); for exact calendar calculations, use a date or time-zone tool.
Bookmark this page for quick access whenever you need to convert time between different units. Whether you are coding, calculating, or just curious, this free time converter provides fast, accurate, and easy-to-read results on any device.