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Free A-Z Online Calculators

Free A-Z Online Calculators
  • specific surface area calculator
    Area Calculators

    Specific Surface Area Calculator

    ByXavier December 18, 2025December 19, 2025

    Specific Surface Area Calculator Specific Surface Area Geometric BET (Ads) Particle Shape Sphere (Idealized)Cube Particle Diameter (d) nmµmmm Material Density (ρ) g/cm³kg/m³ Silica (2.65) Water (1.0) Gold (19.3) Iron (7.87) Carbon (2.26) Adsorbate Gas Nitrogen (N₂) – 0.162 nm²Argon (Ar) – 0.142 nm²Krypton (Kr) – 0.210 nm²Water Vapor (H₂O) – 0.125 nm² Monolayer Capacity ($V_m$…

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  • Surface area and volume calculator
    Area Calculators

    Surface Area Volume Calculator

    ByXavier December 18, 2025December 19, 2025

    Surface Area & Volume Calculator Surface Area & Volume Compute geometric properties for common 3D shapes. Box (Rect Prism) Cube Sphere Cylinder Cone Length (l) Width (w) Height (h) Side Length (s) Radius (r) Radius (r) Height (h) Radius (r) Height (h) Surface Area (SA) — units² Volume (V) — units³ The Surface Area and…

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  • surface area to volume calculator
    Area Calculators

    Surface Area To Volume Calculator

    ByXavier December 18, 2025December 19, 2025

    Surface Area to Volume Ratio Calculator SA/V Ratio Calculator Calculate Surface Area to Volume Ratio (SA:V). Cube Sphere Cylinder Dimensions Side Length (s) units Radius (r) units Radius (r) units Height (h) units Results Surface Area to Volume Ratio — SA : V Surface Area — Volume — Formula Used: A higher ratio means more…

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  • Total Flow area calculator
    Area Calculators

    Total Flow Area Calculator

    ByXavier December 18, 2025December 19, 2025

    Total Flow Area (TFA) Calculator TFA Calculator Total Flow Area & Drilling Hydraulics. Nozzle Sizes (1/32″) + Add – Remove Flow Rate (GPM) Mud Weight (PPG) Bit Size (in) Total Flow Area (TFA) — square inches (in²) Jet Velocity — ft/sec HSI — HP/in² Pressure Drop — psi Impact Force — lbf In the high-stakes…

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  • Wing area calculator
    Area Calculators

    Wing Area Calculator

    ByXavier December 17, 2025December 17, 2025

    Designing or setting up an RC airplane requires more than just good looks; it requires precise aerodynamic calculations Advanced Wing Area & CG Calculator Wing Designer Area, MAC, & CG Calculator Imperial (in, oz) Metric (mm, g) Main Wing Panels + Add Tail & Fuselage Root Tip Span (Half) Sweep Tail Distance (Wing Root LE…

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  • Effective Projected Area Calculator
    Area Calculators

    Effective Projected Area Calculator

    ByXavier December 17, 2025December 18, 2025

    Effective Projected Area (EPA) Calculator EPA Calculator (Advanced) Calculate EPA for Structural Shapes & Signs Imperial (ft, lbs) Metric (m, N) Structure & Components + Add Component Wind Conditions Wind Speed (mph) Gust Factor (G) System Stack (Frontal View) WIND FLOW Total Projected Area — sq ft Total EPA ($Area \times C_d$) — sq ft…

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  • Circle area calculator
    Circles & Curved Figures

    Circle Area Calculator

    ByXavier December 17, 2025December 19, 2025

    Circle Area Calculator — Area, Circumference, Radius & Diameter Circle Area Calculator Compute area, radius, diameter, and circumference instantly. Supports multiple units, detailed steps, and interactive visualizations. What do you want to find? Auto-detect (fill any field)Find properties using RadiusFind properties using DiameterFind properties using CircumferenceFind properties using Area Radius mcmmmkminftyd Ft + In Helper…

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  • Triangle area calculator (base & height)
    Area Calculators

    Triangle Area Calculator (Base–Height)

    ByXavier December 17, 2025December 19, 2025

    Remember that one formula from school that actually stuck? “One-half base times height.” It sounds simple, but when you’re standing in your backyard trying to figure out how much plywood you need for a shed roof, the math can get a little fuzzy. That is exactly why we built this calculator. Whether you’re a student,…

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  • square area calculator
    Rectangles

    Square Area Calculator

    ByXavier December 17, 2025December 18, 2025

    Square Area Calculator Square Area Calculator Compute area from side, or find side from area, diagonal, or perimeter. Calculation Mode Find Area (from Side)Find Side (from Area)Find Side (from Diagonal)Find Side (from Perimeter) Side Length (s) mcmmmftinyd Set Area (A) m²cm²ft²in²ac Precision 234 Calculate Reset Result – Conversions Ever found yourself staring at a box…

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  • Rectangle area calculator
    Rectangles

    Rectangle Area Calculator

    ByXavier December 16, 2025December 18, 2025

    Rectangle Area Calculator Rectangle Area Calculator Calculate area, length, or width. Supports Metric, Imperial (ft+in), and other units. Calculation Mode Calculate Area (Length × Width)Find Width (requires Area & Length)Find Length (requires Area & Width) Length (l) mcmmmftinyd ft + in Use Width (w) mcmmmftinyd ft + in Use Area (A) m²cm²ft²in²yd² Precision 234 Calculate…

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