How do I add dagen to a date?

Pick the start date, leave the operation on 'Add', and enter the nummer of dagen (and optionally weeks, maanden, jaren). The result date updates direct.

How are maanden and jaren added?

Years and maanden are applied first as calendar units, clamping to the last valid day (Jan 31 + 1 month = Feb 28/29). Weeks and dagen are then added as exact 24-hour dagen.

What is the total day offset?

It is the net nummer of calendar dagen between the start date and the result — positive when adding, negative when subtracting.

Date Add / Subtract Calculator

Gratis add/subtract date calculator. Pick a start date, choose to add or subtract, and enter jaren, maanden, weeks and dagen to get the resulting date and the total day offset.

Add or subtract jaren, maanden, weeks and dagen from any date.

Gerelateerde calculators

Datumsverschil Calculator

Count the dagen, weeks, maanden and business dagen between two dates.

Leeftijd Calculator

Find your exact age in jaren, maanden and dagen, plus totals and your next birthday.

Tijdsduur Calculator

Bereken the uren and minuten between a start and end time, minus breaks.

Aftellen Calculator

Count the dagen, weeks and business dagen until a target date.