CalculatorCast
Mathématiques Finance Santé & Fitness Date et Heure Convertisseurs d'Unités Informatique Physique Chimie Construction Ingénierie Statistiques Éducation Vie Quotidienne Biologie Automobile Cuisine & Alimentation Sport & Fitness Immobilier Photographie Électricité Agriculture Voyage Affaires
Toutes les Calculatrices Favoris ()
English Español Français Deutsch Português Italiano Nederlands Polski Türkçe 日本語 한국어 Svenska Norsk Dansk Suomi עברית

Ajouter ou soustraire des jours

Avance ou recule d'un nombre de jours donné à partir de n'importe quelle date.

Introduction

Add or Subtract Days — Jump forward or back a set number of days from any date. Enter Start date, Days, Operation to get an instant, accurate result.

Formule

Result date = start date ± number of days, using real calendar-day arithmetic.

Étape par étape

  1. Enter the Start date.
  2. Enter the Days.
  3. Enter the Operation.
  4. Click Calculate to see your result instantly.

Exemple concret

Example: With Start date = 2026-10-09, Days = 30, Operation = +, the Add or Subtract Days gives Result Date: 2026-11-08.

Questions Fréquentes

Does this handle month/year boundaries correctly?
Yes, it's calculated using real calendar arithmetic, not a fixed 30-day month assumption.
Can I subtract a large number of days?
Yes, any number of days forward or backward works.
What inputs does the Add or Subtract Days need?
You'll need to provide: Start date, Days, Operation. All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.
How accurate is the Add or Subtract Days?
The Add or Subtract Days applies the formula exactly as calculated — Result date = start date ± number of days, using real calendar-day arithmetic. — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.
Is the Add or Subtract Days free to use?
Yes, the Add or Subtract Days is completely free, requires no signup, and runs instantly in your browser.

À propos de Ajouter ou soustraire des jours

The Add or Subtract Days uses a real, verifiable formula — Result date = start date ± number of days, using real calendar-day arithmetic. — so results are accurate every time, not an approximation.