Relative Time Calculator

Add or subtract a duration from a base date. Line 1: base date. Line 2: offset like +3 days, -2 weeks, or +90 minutes.

  • Runs entirely in your browser
  • No data stored or sent to a server
  • Free forever — no signup
  • Instant conversion

Input and Output

Use the interactive encoder and decoder on this page to process your text.

Learn more about relative time

How to Add or Subtract Time

Relative Time

Offset Format

Line 1: base date. Line 2: offset like +3 days, -2 weeks, or +90 minutes.