Concrete Curing Time Planner

Inputs

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Pour
°C
Targets
Strength milestonesStrength milestonescuring 7 days01371428days50%70%100%myconstructioncalculator.com
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Results

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Minimum moist curing (ACI 308.1)
7 days→ Mon, 9 Nov 2026
50% of 28-day strength47 hours → Wed, 4 Nov 2026
70% (soffit striking)4.8 days → Sat, 7 Nov 2026
100% (28-day strength)28.1 days → Mon, 30 Nov 2026
Strength at 7 days78 % of 28-day

Estimates only. Confirm striking times with field-cured cubes or maturity sensors and the engineer’s approval.

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Working
  1. Strength gain βcc(t) = exp{s[1 − √(28/t)]}, s = 0.25 for class N (EN 1992-1-1 Eq. 3.2)
  2. Temperature-adjusted age: 0.998 equivalent days per day at 20 °C (Annex B)
  3. Days to ratio r = 28 ÷ (1 − ln r ÷ s)² ÷ temperature factor → 50%: 2.0, 70%: 4.8, 100%: 28.1 days

Results are estimates for planning and material ordering only. They are not a substitute for structural design or approval by a qualified engineer. Read the full disclaimer.

Concrete Curing Time Planner byMy Construction Calculator: free construction calculators with the working shown.