Brewing Variables

Brew Time and Contact Time

Use timing as evidence while recognizing that methods define contact differently.

By Julian R. NorthcottUpdated July 2026

Pour-over includes active pouring and drawdown, while immersion starts when water reaches grounds. Timing helps diagnose consistency only when ratio and grind are controlled.

What to evaluate

Keep the decision connected to the actual coffee, brewer and serving goal.

  • Start timing at the same event
  • Record total drawdown
  • Separate steep and drain time
  • Assess machines at intended batch size

A repeatable workflow

Use one baseline, then change only what the evidence supports.

  1. Use a baseline grind
  2. Time the full brew consistently
  3. Taste before adjusting
  4. Change grind when flow is clearly wrong

Common mistakes

These errors make comparisons unreliable or create avoidable problems.

  • Stopping the timer differently
  • Forcing target time with agitation
  • Ignoring clogs
  • Comparing one-cup and full-pot times