Skip to main content
Calcimator

Concrete Strength Calculator

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

Inputs

Results

28-Day Strength (psi)

7,262 psi

Temp-Corrected Strength

6,942 psi

Strength Ratio95.59%
7-Day Strength (psi)5,109 psi
28-Day Strength (psi)7,262 psi
56-Day Strength (psi)7,881 psi
Strength at Curing Day7,314 psi
Cement Adequate (1=Yes)1
How to Use This Calculator
  1. Enter the cement content in kg/m³ — typical structural mixes use 300–450 kg/m³.
  2. Set the water/cement ratio (0.25–0.80); lower values produce stronger concrete.
  3. Enter the number of curing days since placement and the average curing temperature in °F.
  4. Read the 28-Day Strength (psi) as the baseline prediction from Abrams' law.
  5. Compare Temp-Corrected Strength to the baseline to see how temperature has helped or hurt strength gain.
  6. Use the strength development chart to verify 7-day and 56-day milestone strengths against project requirements.
Ad Placeholder

Related Calculators

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.

Concrete Temperature Calculator

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

Fiber Reinforcement Calculator

Calculate fiber reinforcement quantities and costs for concrete including synthetic micro, steel, and macro fibers. Compare to welded wire fabric.

Rebar Weight Calculator

Calculate rebar weight by bar size, length, and quantity using ASTM A615 standard weights per foot.

Ad Placeholder