Sourdough Water Temperature Chart for a 72 Degree (72°F / 22°C) Kitchen — High-Friction Planetary Mixer (74°F DDT)
4-factor Desired Dough Temperature (DDT) and mixer friction offset (+24°F) for hitting 74°F dough in a 72°F room.
Target a 74°F (23.3°C) dough, account for a 72°F (22.2 Celsius) room plus 72°F flour and levain, then add the +24°F of heat that high-friction planetary mixer (74°f ddt) generates: 4 × 74°F − (72 + 72 + 72 + 24) = 56°F of mix water. Blending 23g of crushed ice with 327g of 68°F water is how you reach 56°F in this kitchen; the phase change alone strips 80 cal per gram before the water even warms.
- Required Water Temp
- 56°F (13.3°C)To hit 74°F DDT in 72°F room
- 350g Batch Ice Split
- 23g Ice / 327g WBased on 68°F tap water & 80 cal/g latent heat
- Mixer Friction Factor
- +24°FHigh-Friction Planetary Mixer
- Target Final Dough Temp
- 74°F (23.3°C)Locks fermentation clock & protease rate
DDT Reference for 72°F Kitchens — High-Friction Planetary Mixer (74°F DDT) Water & Ice Split
Sums each row to the batch water weight so the split between ice and liquid always reconciles.
| Water Load | Theoretical Temp | Crushed Ice | Tap Water | Final Dough Temp |
|---|---|---|---|---|
| Line 350g [350g Ref] | required 56°F (13.3°C) | weigh 23g ice | measure 327g liquid | expect 74°F dough |
| Line 300g 100g Lighter | required 56°F (13.3°C) | weigh 20g ice | measure 280g liquid | expect 74°F dough |
| Line 400g 100g Heavier | required 56°F (13.3°C) | weigh 27g ice | measure 373g liquid | expect 74°F dough |
| Line 250g Half Batch | required 56°F (13.3°C) | weigh 17g ice | measure 233g liquid | expect 74°F dough |
| Line 500g Large Batch | required 56°F (13.3°C) | weigh 33g ice | measure 467g liquid | expect 74°F dough |
Interactive Desired Dough Temp (DDT) & Ice Solver Calculator
Compare your exact mixing bowl dimensions, flour protein percentage, or discard weight in real time.
Offsetting +24°F Mixer Friction in a 72°F (22°C) Kitchen: Target 56°F Water
Levain temperature is the silent variable in this equation. If the 22.2°C (72°F) kitchen assumption holds for the room and the flour but the levain actually sits two degrees cooler, the finished dough will miss the 74°F target by about half a degree, and in a hot month that is enough to ferment the dough noticeably faster than planned.
Probe the ingredients, not the plan. Room, flour and levain each carry their own temperature in a 72 deg F (22.2°C) kitchen, and the 56°F (13.3°C) figure above assumes all three are at 72 deg F. A 3°F error in the flour alone shifts the finished dough by roughly 1°F.
Thermal Control Protocol for High-Friction Planetary Mixer (74°F DDT) in a 72°F Room
- Check for Sunlight: A 72 degrees (22.2°C) reading taken in direct sun is unreliable — move the bowl to the work surface and re-probe before you trust the arithmetic.
- Equalise the Levain: Pull the starter out of the refrigerator and let it come toward 72 degrees, because the levain is a third of the 4-factor equation and a cold levain silently drags the whole dough down.
- Build the Slush: Combine 23g of finely crushed ice with 327g of tap water at 68°F and stir until no shards remain.
- Mix, Probe and Trust: Run high-friction planetary mixer (74°f ddt) (+24°F), then confirm the dough reads 74°F ± 1°F before the fermentation clock starts.
Frequently Asked Questions for This Desired Dough Temp (DDT) & Ice Solver Spec
Does the type of mixer actually change the water temperature?
Yes, and that is exactly what the friction factor models. High-Friction Planetary Mixer contributes +24°F, so the same 72°F (22.2°C) kitchen needs a 56°F mix water for this machine and a different one for a hand-mixed dough.
Does humidity in a 72 degrees (22.2°C) kitchen change the water temperature?
Marginally. On a humid morning the dough surface loses less moisture and cools a little less, so half a degree less cold water is usually right. Treat it as a refinement, not a correction.
Why is my crumb gummy even though the dough looked the right temperature?
A correct 74°F dough can still bake badly if the core never reached 208°F. Check the internal temperature with a probe rather than trusting the oven dial, and remember to cool the loaf for two hours before slicing.