Form Stripping Time Calculator

Estimate minimum form removal time based on concrete strength gain and temperature.

Ambient temperature (°F)

28-day design strength (psi)

Member type

Cement type

Wet curing

Tab to move between fields

Min stripping time (hours)

14.7

Min stripping time (days)0.6

Required strength (psi)500

Est. strength at strip (psi)543

% of 28-day strength13.6

Maturity (°F·hr)752

Member LabelVertical (wall/column)

How to Use This Calculator

Enter the Ambient Temperature in °F and the 28-Day Design Strength of the concrete mix.
Select the Member Type (vertical, slab soffit, or beam/joist soffit) and Cement Type.
Indicate whether Wet Curing or blankets are being used — this reduces minimum strip time.
Review Minimum Stripping Time in hours and days before removing any formwork.
Check Estimated Strength at Strip and % of 28-Day Strength to confirm structural adequacy.

How the result changes with Ambient temperature (°F)

Ambient temperature (°F): Average ambient temperature during curing.
28-day design strength (psi): Specified 28-day compressive strength of the concrete.
Member type: 0 = Vertical (wall/column), 1 = Slab soffit, 2 = Beam/joist soffit.
Cement type: 0 = Type I (normal), 1 = Type III (high-early strength).
Wet curing: 1 = Wet cured or blankets used, 0 = No special curing.

Min stripping time (hours): Minimum time before forms can be safely removed.
Min stripping time (days): Minimum stripping time expressed in days.
Required strength (psi): Minimum concrete strength needed before stripping.
Est. strength at strip (psi): Estimated concrete strength at the stripping time.
% of 28-day strength: Estimated strength as percentage of 28-day design strength.
Maturity (°F·hr): Nurse-Saul maturity index at stripping time.

Identify Input Parameters
4 parameters
Ambient temperature (°F) = 65, 28-day design strength (psi) = 4000, Member type = 0, Cement type = 0 = 5 input(s) provided
Calculate Min stripping time
Min stripping time = finalStrippingDays * 24
14.7 = 14.7
Calculate Min stripping time
Min stripping time = tempAdjustedDays * curingFactor
0.6 = 0.6
Calculate Required strength
Required strength = f28 * requiredStrengthFraction
500 = 500