Hours and minutes from number of seconds using JavaScript

We are required to write a JavaScript function that takes in the number of seconds and returns the number of hours and minutes contained in those seconds.

Problem Statement

Given a number of seconds, we need to convert it into a readable format showing hours and minutes.

Input:

3601 seconds

Expected Output:

"1 hour(s) and 0 minute(s)"

Solution

Here's how we can convert seconds to hours and minutes:

const seconds = 3601;

const toTime = (seconds = 60) => {
    const hR = 3600; // 1 hour = 3600 seconds
    const mR = 60;   // 1 minute = 60 seconds
    
    let h = Math.floor(seconds / hR);
    let m = Math.floor((seconds - (h * 3600)) / mR);
    
    let res = `${h} hour(s) and ${m} minute(s)`;
    return res;
};

console.log(toTime(seconds));

1 hour(s) and 0 minute(s)

How It Works

The conversion uses these calculations:

• Hours: Divide total seconds by 3600 and use Math.floor() to get whole hours
• Minutes: Get remaining seconds after removing hours, then divide by 60

Alternative Approach

Here's a more flexible version that handles different time units:

const convertSeconds = (totalSeconds) => {
    const hours = Math.floor(totalSeconds / 3600);
    const minutes = Math.floor((totalSeconds % 3600) / 60);
    const remainingSeconds = totalSeconds % 60;
    
    return {
        hours: hours,
        minutes: minutes,
        seconds: remainingSeconds,
        formatted: `${hours}h ${minutes}m ${remainingSeconds}s`
    };
};

// Test with different values
console.log(convertSeconds(3661)); // 1 hour, 1 minute, 1 second
console.log(convertSeconds(7200)); // 2 hours exactly
console.log(convertSeconds(90));   // 1 minute, 30 seconds

{ hours: 1, minutes: 1, seconds: 1, formatted: '1h 1m 1s' }
{ hours: 2, minutes: 0, seconds: 0, formatted: '2h 0m 0s' }
{ hours: 0, minutes: 1, seconds: 30, formatted: '0h 1m 30s' }

Conclusion

Converting seconds to hours and minutes involves dividing by 3600 for hours and using the modulo operator for remaining time. Use Math.floor() to ensure whole numbers for time units.