Answer firstGreat, repeatable pour-over comes down to three levers: grind, water temperature and time. Too sour, go finer / hotter / longer; too bitter, the opposite. Golden rule: change one variable at a time, so you know what did what.
Dial-in cheat sheet: find your cup
Set a baseline first
Before adjusting, start from a baseline: 1:15 ratio, medium grind, 92°C, 2:30–3:00 total. From a fixed baseline, change one variable at a time to dial in clearly.
1:15
Ratio
Medium
Grind
92°C
Water temp
2:30–3:00
Total time
Baseline: ratio · grind · temp · time
The three levers: how each affects extraction
Grind: finer → more surface → more extraction (biggest impact). Temperature: hotter → faster extraction. Time: longer → more extraction. Together they set how much you extract.
Grind · temperature · time, three sliders
What grind size looks like
Coarse
French press · cold brew big grains · low surface area
slow → sour side
Medium
pour-over · drip easiest to start
balanced
Fine
espresso many grains · high surface area
fast → bitter side
Same dose: finer grind means more particles and more surface area, so it extracts faster (bitter risk); coarser is slower (sour risk).
Taste diagnostic, quick chart
Too sour (under-extracted) → grind finer / hotter / longer. Too bitter (over-extracted) → grind coarser / cooler / shorter. The middle is where sweetness lives.
1. Set ratio 1:15 → 2. brew and taste → 3. too sour? finer/hotter/longer; too bitter? coarser/cooler/shorter, one change only → 4. brew and taste again until balanced. Note each change.
Set ratio → taste → change one → taste again
· · ·
Common mistakes
Changing two variables at once (you can’t tell which did what); an inconsistent grind (cheap grinder; evenness beats everything); wrong water temperature; blind brewing (no scale, no timer).
Two changes at once / uneven grind / wrong temp / blind brewing
Taste and feel calibrate fastest with a trainer beside you. JWC’s 1-day hands-on class dials you in.
FAQ
Why one variable at a time?
So you know which lever did what. Two at once and you can’t tell.
Grind or temperature first?
Fix the ratio, then grind (biggest impact), then fine-tune temp and time.
No temperature kettle?
After boiling, wait 30–40 seconds to drop to about 92–94°C.
Inconsistent grind?
Get a better grinder; evenness matters more than anything.
Stop guessing
Is your pour-over pure luck?
Learn a systematic dial-in for a great cup every time · RM199 · real gear · hands-on
