Concrete Curing Calculator

Estimate concrete curing time to reach target strength based on cement type and ambient temperature using ACI 209 and Nurse-Saul maturity.

Ambient Temperature (°F)

Cement Type (1=Type I, 2=Type III, 3=Type II)

Target Strength (% of 28-day)

Tab to move between fields

Curing Days (at 73°F)

8.3

Adjusted Curing Days

8.7

7-Day Strength (%)70.4%

28-Day Strength (%)100.7%

56-Day Strength (%)108.5%

Temperature Factor0.949

Hot Weather Risk (1=Yes)0

Cold Weather Risk (1=Yes)0

How to Use This Calculator

Select your cement type: 1 for Type I (normal), 2 for Type III (high early strength), or 3 for Type II (moderate heat).
Enter the average ambient temperature in °F during the curing period.
Set the target strength as a percentage of the 28-day design strength (e.g., 75% for typical stripping).
Read the Curing Days at 73°F to see the baseline time, then use Adjusted Curing Days for your actual temperature.
Check the Hot/Cold Weather Risk flags — above 90°F or below 40°F requires special curing measures.
Use the strength development chart to confirm what percentage of design strength is achieved at 7, 28, and 56 days.

Ad Placeholder

Related Calculators

Estimate concrete compressive strength using Abrams' law and ACI 209 maturity model with temperature correction.

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

Calculate shotcrete volume needed including rebound waste, overspray, weight, and application time estimates.

Calculate pervious concrete volume, infiltration rate, stormwater storage capacity, and runoff reduction compared to impervious surfaces.

Ad Placeholder