Date add and subtract calculator
Use the Date add and subtract calculator for fast, clear results with formulas and practical examples.
Date add and subtract calculator
Result2026-09-02
How to use this tool
- Enter the known values.
- Select Calculate to process the inputs.
- Review the result, formula, and calculation steps.
Worked example
Follow this example to see the method in practice.
Formula
target date = base date ± calendar duration
Frequently asked questions
Formula
The formula below shows how the result is calculated.
Important information
Results are estimates for general informational purposes. Check important decisions with an appropriate professional or primary source.