Engineering Calculation Tools
Welcome to your digital toolbox. Select a calculator below to get instant, accurate results for your construction projects. All tools are free to use for site engineers, architects, and students.
Rebar Weight
Calculate steel reinforcement weight (D²/162) and total tonnage.
Open Tool →Concrete Volume
Estimate concrete volume (m³) and premix bags for slabs & columns.
Open Tool →Staircase Design
Calculate step count, riser height, and tread depth (Blondel Rule).
Open Tool →Brick & Block
Calculate wall materials, mortar joints, and wastage.
Open Tool →Slope & Gradient
Find slope percentage (%), angle, and ratio for ramps & roofs.
Open Tool →Unit Converter
Convert Length, Area, Volume, and Pressure (Metric ↔ Imperial).
Open Tool →Asphalt Tonnage
Calculate Hot Mix Asphalt required for roads and driveways.
Open Tool →Paint Cost
Estimate paint liters & gallons for walls and ceilings.
Open Tool →CNC Feeds & Speeds
Calculate Milling RPM and Feed Rate (mm/min).
Open Tool →Ohm's Law
Calculate Voltage, Current, and Resistance (V=IR).
Open Tool →Resistor Decoder
Decode 4 & 5 band resistor colors to Ohms.
Open Tool →Scientific Calculator
Advanced functions: Sin, Cos, Tan, Log, Exponents.
Open Tool →LED Resistor
Calculate the series resistor for any LED circuit.
Open Tool →555 Timer Calc
Calculate Frequency, Duty Cycle and Period for Astable Mode.
Open Tool →Voltage Divider
Step down high voltage to lower voltage easily.
Open Tool →Beam Calculator
Calculate support reactions & bending moment (Point Load).
Open Tool →Bridge Designer CAD
Design truss structures in a mini-CAD environment. Snap-to-grid included.
Open Tool →Solar Calculator
Calculate daily & monthly energy production for PV systems.
Open Tool →Graphing Plotter
Plot math functions instantly. Interactive zoom & pan.
Plot Function →Formula Cheat Sheet
Quick reference guide for Civil, Electrical & Mech formulas.
Search Formulas →3D Builder
Build structures in 3D. Calculate volume and weight instantly.
Open 3D Tool →Note: These tools are designed for estimation purposes. Always consult a professional structural engineer for final construction drawings.
Why Use Our Engineering Calculators?
Construction projects leave no room for error. Whether you are calculating the reinforcement weight for a high-rise building or estimating the asphalt tonnage for a driveway, precision is key.
At Real Engineerings, we provide a suite of free, professional-grade tools designed to simplify complex site calculations. Instead of relying on manual formulas and risking human error, our automated tools give you instant, accurate results based on industry standards (ACI, Eurocode, ASTM).
🏗️ Structural & Material Estimations
From Rebar Weight to Concrete Volume, our tools help site engineers and quantity surveyors prevent material wastage. Knowing the exact amount of bricks, blocks, or premix bags required can save up to 15% of your project budget.
⚙️ Precision for Machining & Design
We go beyond civil engineering. Our CNC Feeds & Speeds Calculator helps mechanical engineers and machinists optimize their milling operations, preventing tool breakage and ensuring the perfect surface finish for Aluminum and Steel parts.
📐 Architect-Approved Design Tools
Designing a comfortable staircase or a wheelchair-accessible ramp requires strict adherence to building codes. Our Staircase and Slope Calculators ensure your designs meet safety regulations like the Blondel Rule and ADA standards.
Bookmark this page and make it your daily companion on the construction site. We update our algorithms regularly to ensure they match the latest engineering practices.
