Products

HOUR function

PRO BASIC

The HOUR function in Jspreadsheet Formulas Pro is used to extract the hour component from a specific time. It presents the hour in a numeric format. For example, if the time is '5:30:15', the HOUR function will return '5'. This function is particularly useful when you need to perform calculations or comparisons based on the hour part of a time value.

Documentation

Returns the hour component of a specific time, in numeric format.

Category

Date and time

Syntax

HOUR(serial_number)

Parameter Description
serial_number The time from which to extract the hour component. Jspreadsheet stores dates and times as serial numbers, for example "Jan 1, 2023 12:00 PM" is stored as 44420.5.

Behavior

The HOUR function in a spreadsheet is used to extract the hour as an integer from a given time value. The time can be referenced from a cell containing the time or it can be manually entered into the function.

  • When the cell is empty, the HOUR function returns 0.
  • If the cell contains text, the HOUR function returns a #VALUE! error.
  • In case of boolean values, HOUR function treats TRUE as 1 and FALSE as 0, interpreting them as time values. Since these are not valid time values, the function returns 0.
  • If a cell contains an error, the HOUR function will also return that error.
  • The HOUR function ignores the date part if it's included with the time value.

Common Errors

Error Description
#VALUE! This error occurs when the value provided in the function is not a valid time.
#NUM! This error occurs when the provided time value is out of range. The time values must be between 0 (0:00:00 AM) and 1 (11:59:59 PM).
#REF! This error is returned when the cell reference provided in the function is invalid.

Best practices

  • Always ensure that the data provided to the HOUR function is a valid time, in order to avoid a #VALUE! error.
  • In case you're not sure about the validity of data, you can use error checking functions like ISERROR or IFERROR along with the HOUR function to handle possible errors.
  • If you're manually entering the time into the HOUR function, always use the correct time format.
  • Remember, the HOUR function ignores the date part if it's included with the time value. Make sure you are only interested in the hour part of the time.

Usage

A few examples using the HOUR function.

HOUR("08:30:00")          // Returns 8  
HOUR("15:45:00")          // Returns 15  
HOUR("23:59:01")          // Returns 23  
HOUR(0.5)                 // Returns 12 (0.5 represents 12:00 PM)  
HOUR(DATEVALUE("2025-08-12") + TIMEVALUE("06:15:00")) // Returns 6  
HOUR("")                  // Returns #VALUE!

Interactive Spreadsheet Demo

<html>
<script src="https://jspreadsheet.com/v11/jspreadsheet.js"></script>
<script src="https://jsuites.net/v5/jsuites.js"></script>
<link rel="stylesheet" href="https://jsuites.net/v5/jsuites.css" type="text/css" />
<link rel="stylesheet" href="https://jspreadsheet.com/v11/jspreadsheet.css" type="text/css" />

<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Material+Icons" />
<script src="https://cdn.jsdelivr.net/npm/@jspreadsheet/formula-pro/dist/index.min.js"></script>

<div id="spreadsheet"></div>

<script>
// Set your JSS license key (The following key only works for one day)
jspreadsheet.setLicense('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');

// Set the extensions
jspreadsheet.setExtensions({ formula });

// Create a new spreadsheet
jspreadsheet(document.getElementById('spreadsheet'), {
  worksheets: [{
    data: [
    [
        "Time",
        "Hour"
    ],
    [
        "8:30:00 AM",
        "=HOUR(A2)"
    ],
    [
        "15:45:00",
        "=HOUR(A3)"
    ],
    [
        "23:59:01",
        "=HOUR(A4)"
    ],
    [
        "2:15:30 PM",
        "=HOUR(A5)"
    ]
]
  }]
});
</script>
</html>
import React, { useRef } from "react";
import { Spreadsheet, Worksheet, jspreadsheet } from "@jspreadsheet/react";
import formula from "@jspreadsheet/formula-pro";
import "jsuites/dist/jsuites.css";
import "jspreadsheet/dist/jspreadsheet.css";

// Set license
jspreadsheet.setLicense('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');

// Set the extensions
jspreadsheet.setExtensions({ formula });

export default function App() {
    // Spreadsheet array of worksheets
    const spreadsheet = useRef();

    // Worksheet data
    const data = [
    [
        "Time",
        "Hour"
    ],
    [
        "8:30:00 AM",
        "=HOUR(A2)"
    ],
    [
        "15:45:00",
        "=HOUR(A3)"
    ],
    [
        "23:59:01",
        "=HOUR(A4)"
    ],
    [
        "2:15:30 PM",
        "=HOUR(A5)"
    ]
];

    // Render component
    return (
        <Spreadsheet ref={spreadsheet}>
            <Worksheet data={data} />
        </Spreadsheet>
    );
}
<template>
    <Spreadsheet ref="spreadsheet">
        <Worksheet :data="data" />
    </Spreadsheet>
</template>

<script>
import { Spreadsheet, Worksheet, jspreadsheet } from "@jspreadsheet/vue";
import "jsuites/dist/jsuites.css";
import "jspreadsheet/dist/jspreadsheet.css";
import formula from "@jspreadsheet/formula-pro";

// Set license
jspreadsheet.setLicense('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');

// Set the extensions
jspreadsheet.setExtensions({ formula });

export default {
    components: {
        Spreadsheet,
        Worksheet,
    },
    data() {
        // Worksheet data
        const data = [
    [
        "Time",
        "Hour"
    ],
    [
        "8:30:00 AM",
        "=HOUR(A2)"
    ],
    [
        "15:45:00",
        "=HOUR(A3)"
    ],
    [
        "23:59:01",
        "=HOUR(A4)"
    ],
    [
        "2:15:30 PM",
        "=HOUR(A5)"
    ]
]

        return {
            data
        };
    }
}
</script>
import { Component, ViewChild, ElementRef } from "@angular/core";
import jspreadsheet from "jspreadsheet";
import * as formula from "@jspreadsheet/formula-pro";

// Set your JSS license key (The following key only works for one day)
jspreadsheet.setLicense('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');

// Set the extensions
jspreadsheet.setExtensions({ formula });

@Component({
    standalone: true,
    selector: "app-root",
    template: `<div #spreadsheet></div>`
})
export class AppComponent {
    @ViewChild("spreadsheet") spreadsheet: ElementRef;
    // Worksheets
    worksheets: jspreadsheet.worksheetInstance[];

    // Create a new data grid
    ngAfterViewInit() {
        // Create spreadsheet
        this.worksheets = jspreadsheet(this.spreadsheet.nativeElement, {
            worksheets: [{
                data: [
    [
        "Time",
        "Hour"
    ],
    [
        "8:30:00 AM",
        "=HOUR(A2)"
    ],
    [
        "15:45:00",
        "=HOUR(A3)"
    ],
    [
        "23:59:01",
        "=HOUR(A4)"
    ],
    [
        "2:15:30 PM",
        "=HOUR(A5)"
    ]
]
            }]
        });
    }
}