# Round time to the nearest Minute using JavaScript

Sun Jan 16 20222 min read

Photo by Julia Caesar

## Round time to the nearest Minute using JavaScript#

To round time to the nearest minute:

1. Convert 1 minute to milliseconds.
2. Divide the date's value in milliseconds by the result from the conversion.
3. Pass the result to the `Math.round()` function.
4. Multiply by the number of milliseconds in 1 minute.
index.js
```Copied!```function roundToNearestMinute(date = new Date()) {
const minutes = 1;
const ms = 1000 * 60 * minutes;

// 👇️ replace Math.round with Math.ceil to always round UP
return new Date(Math.round(date.getTime() / ms) * ms);
}

// 👇️ Thu Jan 13 2022 08:30:00 (seconds are 29)
console.log(roundToNearestMinute(new Date(2022, 0, 13, 8, 30, 29)));

// 👇️ Thu Jan 13 2022 08:31:00 (minutes are 30)
console.log(roundToNearestMinute(new Date(2022, 0, 13, 8, 30, 30)));
``````

We used the Date() constructor when logging the examples to the console. The parameters we passed are: `year`, `month` (January = 0, February = 1, etc), `day of month`, `hours`, `minutes`, `seconds`.

We created a reusable function that rounds a date to the nearest minute.

The function takes a `Date` object as a parameter or uses the current date and time if no parameter is provided.

If you always want to round up, replace the `Math.round()` function with `Math.ceil()`.

The `ms` variable stores the number of milliseconds there are in `1` minute.

The getTime method returns the number of milliseconds since the Unix Epoch.

We divide the result by the number of milliseconds in `1` minute and round to the nearest integer using the Math.round function.

Here are some examples of how `Math.round` works.

index.js
```Copied!```console.log(Math.round(2.49)); // 👉️ 2
console.log(Math.round(2.5)); // 👉️ 3
``````

The function rounds the number up or down to the nearest integer.

If the number is positive and its fractional part is greater than or equal to `0.5`, it gets rounded to the next higher absolute value.

If the number is positive and its fractional portion is less than `0.5`, it gets rounded to the lower absolute value.

If you always want to round up to the next minute, use the Math.ceil function instead.

index.js
```Copied!```function roundToNearestMinute(date = new Date()) {
const minutes = 1;
const ms = 1000 * 60 * minutes;

return new Date(Math.ceil(date.getTime() / ms) * ms);
}

// 👇️ Thu Jan 13 2022 08:31:00 (seconds are 29)
console.log(roundToNearestMinute(new Date(2022, 0, 13, 8, 30, 29)));

// 👇️ Thu Jan 13 2022 08:31:00 (minutes are 30)
console.log(roundToNearestMinute(new Date(2022, 0, 13, 8, 30, 30)));
``````

The `Math.ceil` function returns the smallest integer that is greater than or equal to the provided number.

index.js
```Copied!```console.log(Math.ceil(2.1)); // 👉️ 3
console.log(Math.ceil(2.0001)); // 👉️ 3
``````

In short, if there is anything after the decimal, the number will get rounded to the next integer, otherwise the number is returned.

The last step is to multiply the value from calling `Math.round` or `Math.ceil` with the number of milliseconds there are in a minute and pass the result to the `Date()` constructor.

The `roundToNearestMinute` function returns a new `Date` object rounding the seconds to the nearest whole minute.

Use the search field on my Home Page to filter through my more than 1,000 articles.