Desired dough temperature: how to hit the same dough temperature every day
If your dough comes off the mixer at 21 °C one day and 27 °C the next, it will not ferment the same way, no matter how carefully you weighed it. The desired dough temperature (DDT) method fixes that with simple arithmetic: choose the dough temperature, measure what you cannot change, and set the water temperature to make up the difference.
Last reviewed: 2026-10-25
Open the Dough Temperature (Water Temp) Calculator →
Why dough temperature matters
Fermentation speed follows temperature. King Arthur Baking's pro reference points out that dough leaving the mixer at 70 °F one day and 80 °F the next will not give uniform results, and that keeping dough temperature consistent is what gives consistent fermentation, flavor and production timing. It also notes that although yeast grows fastest in the mid-90s °F, very warm doughs lose flavor, because the organic acids that build flavor form at lower temperatures.
Of all the temperatures involved, water is the only one a baker can easily adjust at mixing time. Flour sits at storeroom temperature, the room is what it is, and the mixer adds heat whether you want it or not. So the method solves for the water.
What temperature to aim for
King Arthur gives 75–78 °F (24–26 °C) at the end of mixing for wheat doughs. Naturally leavened doughs that ferment in a retarder may run slightly lower, and sourdoughs with a high proportion of rye are mixed warmer, in the low to mid 80s °F (roughly 27–29 °C).
The formula for a straight dough
For a straight dough (no preferment), three things set the temperature besides the water: the flour, the room and the friction of mixing. Multiply the desired dough temperature by 3 and subtract the other three:
Water = DDT × 3 − flour − room − friction factor
King Arthur's example in Fahrenheit: a desired dough temperature of 76 °F, flour at 72 °F, room at 74 °F and a friction factor of 24 °F.
76 × 3 = 228 → 228 − 72 − 74 − 24 = 58 °F water
The 3 is there because three temperatures are averaged (flour, room and water); the friction factor is then subtracted as the heat the mixer adds on top.
With a preferment: multiply by 4
A poolish, biga or levain brings its own temperature into the dough, so it becomes a fourth factor:
Water = DDT × 4 − flour − room − preferment − friction factor
King Arthur's example: DDT 75 °F, flour 68 °F, room 68 °F, preferment 71 °F and friction 26 °F. 75 × 4 = 300, then 300 − 68 − 68 − 71 − 26 = 67 °F water.
Use the 4-factor version whenever a preferment is a real part of the dough. The preferments guide explains how preferments fit into the formula itself.
Working in Celsius
The formula is linear, so it works unchanged in Celsius as long as every temperature is in °C and the friction factor is a rise in °C. Convert the friction factor by dividing the Fahrenheit rise by 1.8, not with the usual temperature conversion: a 24 °F rise is 24 ÷ 1.8 = 13.3 °C.
Example with the Dough Temperature Calculator's default values: target 25 °C, flour 22 °C, room 23 °C, friction 13.3 °C.
25 × 3 − 22 − 23 − 13.3 = 16.7 °C water
Add a levain at 21 °C and switch to 4 factors: 25 × 4 − 22 − 23 − 21 − 13.3 = 20.7 °C water. The water can be warmer because the levain, at 21 °C, now supplies part of the dough's mass at a temperature below the target.
The friction factor, and how to measure yours
The friction factor is the heat transferred to the dough by mixing and kneading. King Arthur calls it the hardest variable to quantify: it depends on the type of mixer (spiral, oblique or planetary), the mixing time, the speed and the batch size. Published figures give a starting point:
| Mixing | Friction factor | In °C |
|---|---|---|
| Hand kneading, figure many bakers use | 0–4 °F | 0–2.2 °C |
| Hand kneading, 8 minutes (King Arthur test) | 6–8 °F | 3.3–4.4 °C |
| 7-quart stand mixer, 3 min stir + 4 min speed 2 (King Arthur test) | 22–24 °F | 12.2–13.3 °C |
| Most mixers, 3 min speed 1 + 4 min speed 2 (Hamelman, Bread) | 24–28 °F | 13.3–15.6 °C |
From King Arthur Baking's blog post on determining the friction factor. °C figures are the °F rise ÷ 1.8.
Your own number is better than any table. King Arthur describes two ways to find it.
1. Work it backwards from a real mix
Mix a dough, measure its temperature straight after mixing, and rearrange the formula: multiply the dough temperature by 3 (or 4 with a preferment) and subtract the room, flour, water and preferment temperatures. What is left is the friction factor. King Arthur's baguette example: dough 78 °F, room 73 °F, water 67 °F, poolish 76 °F, flour 73 °F.
78 × 4 = 312 → 312 − (73 + 67 + 76 + 73) = 312 − 289 = 23 °F friction
The calculator's "Find my friction factor" mode does exactly this.
2. Tweak an assumed value
Assume a friction factor, use it to set the water, mix and measure. Then correct the assumption by the miss. In King Arthur's example the baker assumed 24 °F and aimed for 77 °F, but the dough came out at 75 °F, 2 degrees short, so the real friction factor was 24 − 2 = 22 °F. Had the dough reached 78 °F, it would have been 24 + 1 = 25 °F.
Repeat the measurement a few times, and keep separate figures for different mixers, speeds and batch sizes, since all of them change the heat the dough picks up.
When the water would have to be below freezing
On a hot day the formula can ask for water colder than liquid water can be. Say the target is 24 °C, the flour has warmed to 30 °C, the room is 32 °C and the mixer adds 15.6 °C: 24 × 3 − 30 − 32 − 15.6 = −5.6 °C.
The options are to cool the other inputs (store the flour somewhere cooler before mixing), to reduce the friction (a shorter or slower mix), or to accept a slightly warmer dough and shorten fermentation to match. The calculator warns you when the result falls below freezing.
Common mistakes
- Converting the friction factor with the °F to °C temperature formula. It is a temperature rise: divide by 1.8.
- Assuming the flour is at room temperature. Measure it, especially if it is stored in a cold storeroom or near an oven.
- Using the 3-factor formula when a preferment is in the dough.
- Never checking the result. Probe the dough after every mix for a while; that is how you find your real friction factor.
Frequently asked questions
What is desired dough temperature?
The temperature you want the dough to have at the end of mixing. King Arthur Baking gives 75–78 °F (24–26 °C) for most wheat doughs and the low to mid 80s °F for rye-heavy sourdoughs.
Why multiply by 3 or by 4?
Because the formula averages the temperatures that make up the dough: flour, room and water (3), plus the preferment when there is one (4). The friction factor is subtracted separately as the heat added by mixing.
How do I convert the friction factor to Celsius?
Divide the Fahrenheit figure by 1.8. A 24 °F rise is 13.3 °C. Do not subtract 32: it is a temperature difference, not a temperature.
What friction factor should I use for hand kneading?
Many bakers use 0–4 °F (0–2 °C); King Arthur measured 6–8 °F (3–4 °C) for 8 minutes of hand kneading. Measure your own once and use that.
What if the formula gives a negative water temperature?
You cannot reach the target with water alone. Cool the flour, mix for less time, or accept a warmer dough and shorten fermentation.
Dough Temperature (Water Temp) Calculator — The water temperature that lands your dough at its target temperature, using the desired-dough-temperature formula, with or without a preferment.
Open the Dough Temperature (Water Temp) Calculator →Sources
- King Arthur Baking — Dough temperature (pro reference) — formulas, worked examples, target temperatures, why consistency matters
- King Arthur Baking — Determining the friction factor — measured friction factors, Hamelman 24–28 °F, both measuring methods, baguette example
Found an error in this guide? Tell us at contact@bakerymath.com