Concrete Temperature Calculator

Calculate fresh concrete temperature from ingredient temperatures using the ACI 305/306 formula. Assess hot/cold weather risks and ice requirements.

Cement Temperature (°F)

Water Temperature (°F)

Aggregate Temperature (°F)

Ambient Temperature (°F)

Tab to move between fields

Fresh Concrete Temp (°F)

Hot Weather Risk (0-1)

Cold Weather Risk (0-1)0

Temp Over 90°F Limit0°F

Ice Needed (lbs/yd³)0

Ice as % of Water0%

Corrected Temp w/Ice76°F

Slump Loss Risk (1=Yes)0

How to Use This Calculator

Enter the temperature of each ingredient: cement (often 100–150°F from grinding), mixing water, aggregates, and ambient air.
The calculator applies the ACI 305/306 weighted formula to predict the Fresh Concrete Temperature.
If the temperature exceeds 90°F, check the Temp Over 90°F Limit and Ice Needed (lbs/yd³) outputs.
Replace a portion of the mixing water with crushed ice equal to the Ice Needed quantity to cool the mix.
Monitor the Hot Weather Risk (0–1) flag; a value of 1 requires ice, chilled water, or night pours.
In cold weather, check Cold Weather Risk and ensure the fresh temperature stays above 50°F per ACI 306.

How the result changes with Aggregate Temperature (°F)

Cement Temperature (°F): Cement is often the hottest ingredient (100-150°F from grinding)
Water Temperature (°F): Mixing water temperature (easiest to control)
Aggregate Temperature (°F): Temperature of coarse and fine aggregates (largest thermal mass)
Ambient Temperature (°F): Outside air temperature at the job site

Identify Input Parameters
4 parameters
Cement Temperature (°F) = 120, Water Temperature (°F) = 60, Aggregate Temperature (°F) = 75, Ambient Temperature (°F) = 85 = 4 input(s) provided
Calculate Fresh Concrete Temp
Fresh Concrete Temp
76 = 76
Calculate Hot Weather Risk
Hot Weather Risk
0 = 0
Calculate Cold Weather Risk
Cold Weather Risk
0 = 0
Calculate Temp Over 90°F Limit
Temp Over 90°F Limit
0 = 0

Engine last updated July 26, 2026. Checked against 2 independently-derived tests — how we verify calculators.

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