Concrete Engineering vs Uncertainty Calculator

Concrete Engineering Calculator is a professional-grade app with all 56 calculators for concrete and civil engineering — fully unlocked from first launch. Smart auto-fill pickers, calculation history with PDF export, and ACI code references on every calculator. Key Features: Supports both Metric (SI) and Imperial (USCS) units Includes detailed formulas for all calculations Smart auto-fill pickers for concrete mix grades, rebar grades, and bar sizes Calculation history with save, review, and PDF export ACI 318-19 code reference badge on every calculator Beam Calculations: Water/Cementitious Materials Ratio Modulus of Elasticity Tensile Strength Compressive Stress (Beam) Stress in Reinforcement Cross-sectional Area (Tensile and Compressive Reinforcement) Stress (Extreme Fiber of Concrete) Shear and Diagonal Tension Nominal Shear Stress Ultimate Shear Capacity Cracking Moment Bending Moment Capacity (Underreinforced and Rectangular Beams) Column Calculations: Total Allowable Axial Load Spiral Reinforcing Ratio Long-Column Load Reduction Factor (Fixed Ends) Maximum Permissible Eccentricity (Spiral and Tied Columns) Bending Load (Spiral and Tied Columns) Slab and Wall Calculations: Slab Thickness Flexural Stiffness Ratio (Beam Section and Slab Width) Axial Capacity of Wall Nominal Shear Stress on Wall Vertical Shear Reinforcement Ratio of Wall Development Lengths and Crack Control: Tension Development Lengths (Various Bar Types) Compression Development Length Development Length (Hooked Bar) Crack Width Control Additional Calculations: Volume of Spiral Steel to Concrete Core Ratio Moment at Balanced Condition Shear Friction Reinforcement Area Coefficient of Sliding Friction Modular Ratio Steel Ratio Effective Moment of Inertia Total End Shear (Counterfort Walls) Ultimate Strength (No Wind, With Wind, With Earthquake Load) Auto-Fill Reference Pickers: Concrete mix picker fills compressive strength and modulus of elasticity automatically Rebar grade picker fills yield strength and modulus of steel automatically Bar size picker fills cross-sectional area and diameter automatically All pickers support both SI and USCS unit modes

Uncertainty Calculator evaluates the error propagation throughout the mathematical expressions comprised of variables of uncertain value. The application allows input of up to three value-error pairs (A, B and C), that can be used as a parameters in the final expression. Error values should be provided in absolute (100 +/- 5) or in relative format, the latter should appear in percent format (100 +/- 5%). The evaluated expression can include numerous functions, that provided by row of the appropriate buttons. Components and functions can be added directly to the expression field by pressing the corresponding buttons. To encompass expression into the preset formula, select the expression and press the corresponding formula button. Particular attention should be paid to placing brackets to avoid equation ambiguity. The application deals with independent, random errors. So if this is a case never use A + A, but rather 2*A and never A*A*A but rather A^3! Obviously, different parameters can be combined in any way (A+B or C *A^2 .. is perfectly fine). Angles for trigonometric functions can be provided in degrees or radians, and that should be reflected by setting a yellow button to "DEG" or "RAD". Bear in mind the importance of units in any of calculations! Implementation Examples: 1.The charge passing through an electrical circuit is defined by: Q = I * t, where I is the current and t is the time. Calculate the total charge value when a current of 0.15 ± 0.01 A passes through the circuit for 120 ± 1 s: Input: A = 0.15 ± 0.01, B = 120 ± 1 The final expression will be A*B, and press Calculate: The final value will be: 18 ± 1.2 Thus, it can be reported the total charge as 18 C ± 1 C. Important! One should only report as many significant figures as are consistent with estimated error! So the value should be rounded to the rightmost decimal place at which error applies. 2. A ball is tossed straight up into the air with initial speed vo = (4.0± 0.2) m/s. After a time t = (0.60 ± 10%) s, the height of the ball is h = vo*t - 0.5gt^2 = 0.636 m (g = 9.80 m/s^2). What is the value and uncertainty of height? Input: A = vo = 4.0 ± 0.2, and B = t = 0.60 ± 10%, then the final expression should be: A*B – 0.5*9.8*B^2 The final value will be: 0.6 ± 0.4 (meters).