Fonctionnement détaillé.
NB.JOURS.OUVRES est une fonction indispensable d'Excel. Calcule le nombre de jours ouvrés entiers entre deux dates, hors week-ends et jours fériés. Elle permet d'automatiser vos tableaux, fiabiliser vos calculs et gagner un temps précieux au quotidien dans vos feuilles de calcul.
💡 En résumé simple.
Counts the number of working days between two dates, automatically skipping weekends (Saturdays & Sundays) and holidays.
"Think of this like counting school days. It counts the days you have school, automatically skipping weekends and holidays."
Syntaxe.
Notation Standard Excel=NB.JOURS.OUVRES(date_départ; date_fin; [jours_fériés])Arguments.
Détail de l'ensemble des paramètres acceptés par cette fonction.
The starting date of the period.
Exemple :A2The ending date of the period.
Exemple :B2A range containing holiday dates to exclude.
Exemple :E2:E3Exemple pas à pas.
Cas d'usage concretCalculate Project Working Days
Calculate the total billable working days between a project start and end date, excluding holidays.
| Start Date | End Date | Work Days | Holidays List | Holiday Date |
|---|---|---|---|---|
| 2026-08-03 | 2026-08-14 | — | Christmas | 2026-08-10 |
| 2026-08-05 | 2026-08-25 | — | New Year | 2026-08-21 |
| 2026-08-10 | 2026-08-21 | — | — | — |
=NETWORKDAYS(A2, B2, E2:E3)Evaluates NETWORKDAYS over the sample table cells, placing the verified output in cell C2:C6.
Générateur de formule.
Ouvrir l'assistant completPersonnalisez les champs ci-dessous pour générer une formule prête à être copiée dans votre classeur.
=NB.JOURS.OUVRES()Nature du résultat produit.
Returns "Calculated output" based on sample evaluation criteria and active cell references.
Bonnes Pratiques
- To calculate working days with custom weekend schedules (like Saturdays only or Friday/Saturdays), use the advanced `=NETWORKDAYS.INTL()` function instead.
Erreurs à Éviter
- Ensure your date values are real Excel serial dates or formatted text cells, rather than plain text that Excel fails to parse.
Compatibilité par logiciel et version.
Vérification effectuée selon les moteurs de calcul officiels de Microsoft et Google.
Core standard function supported across all modern and legacy Microsoft Excel versions (365, 2021, 2019, 2016, 2013, 2010), as well as Excel for the Web and Mac.
100% compatible with Google Sheets. Uses identical argument order, data types, and standard calculation logic.
Questions fréquentes.
Questions TechniquesCan I use NETWORKDAYS across different worksheets in Excel?↓
Yes. You can reference cells located on other sheets by including the sheet name followed by an exclamation mark, for example: =NETWORKDAYS(Sheet2!A2:A10). If the sheet name contains spaces, enclose it in single quotes: ='Q1 Report'!A2:A10.
What is the most common reason for errors in NETWORKDAYS?↓
Ensure your date values are real Excel serial dates or formatted text cells, rather than plain text that Excel fails to parse.
Does NETWORKDAYS work identically in Google Sheets?↓
Yes, NETWORKDAYS is supported in both Microsoft Excel and Google Sheets with standard evaluation behavior.