Engineering & Construction

34 In-Browser Tools

Ohm's law, wire voltage drop, concrete mix volume, steel rebar weight, AC tonnage, and gear ratios. Zero cloud uploads — runs locally on your machine in volatile memory.

Subcategories:

Engineering & Construction

34 In-Browser Tools Private

Ohm's law, wire voltage drop, concrete mix volume, steel rebar weight, AC tonnage, and gear ratios.

Resistor Color Code Calculator (4, 5 & 6 Band)

electrical

Decode 4-band, 5-band, and 6-band axial resistor color bands into exact resistance value, tolerance, and TCR.

Three-Phase Electrical Power Calculator

electrical

Calculate active power (kW), apparent power (kVA), reactive power (kVAR), and line current for 3-phase circuits.

Steel Rebar Weight Calculator (D²/162)

civil-construction

Calculate total weight and procurement cost of civil reinforcement steel rebars using diameter and length.

AC Tonnage & Room BTU Calculator

hvac

Estimate air conditioner cooling capacity in Tons and BTU/hr based on room dimensions, sunlight, and occupants.

Dimensional Weight Shipping Calculator (Volumetric)

logistics

Calculate dimensional (volumetric) weight and billable shipping weight for FedEx, UPS, DHL, and Air Freight.

Pipe Flow & Water Velocity Calculator

fluid-mechanics

Calculate fluid velocity in pipes and determine Reynolds laminar or turbulent flow regimes.

Gear & Pulley Speed and Torque Ratio Calculator

mechanical

Calculate gear transmission ratios, output shaft RPM, and ideal torque amplification.

Brick & Tile Flooring Estimator (with Grout & Wastage)

construction

Estimate exact tile counts, brick quantities, and commercial box counts for floors and walls.

Paint Wall Coverage & Can Quantity Calculator

construction

Calculate paint volume in liters and gallons required for walls with doors/windows deducted.

CNC Feeds & Speeds Milling Calculator

machining

Calculate optimal spindle speed (RPM) and cutting feed rate for CNC milling and routing.

3D Printing Filament & Electricity Cost Calculator

fabrication

Calculate raw filament material cost, printer electricity consumption, and commercial pricing.

Rebar & Structural Steel Weight Calculator (D²/162)

construction

Calculate reinforcing steel rebar bar weights using the standard civil engineering D²/162 formula in kg and tons.

HVAC Cooling Load & AC Tonnage Calculator

hvac

Estimate required air conditioner cooling capacity in BTU/hr and refrigeration tons based on room dimensions and climate.

Resistor Color Bands & Tolerance Calculator

electronics

Decode 4-band, 5-band, and 6-band resistor color codes to exact Ohms (Ω), tolerance percentage, and temperature PPM.

Electric Motor Horsepower, Kilowatts & Torque Calculator

electrical

Calculate electric motor output power in Horsepower (HP), Kilowatts (kW), full-load rotational RPM, and shaft torque.

OEE (Overall Equipment Effectiveness) Calculator

manufacturing

Calculate Overall Equipment Effectiveness (OEE) from machine Availability, Performance efficiency, and Quality yield.

Battery Runtime & Inverter UPS Backup Calculator

electrical

Calculate backup runtime in hours for home inverters, UPS systems, and battery storage banks based on watt load.

Off-Grid Solar Battery Bank Sizing Calculator

solar

Size off-grid solar battery banks in Amp-Hours (Ah) and Kilowatt-Hours (kWh) with autonomy days margin.

RC Time Constant & Cutoff Frequency Filter Calculator

electronics

Calculate RC circuit time constant (Tau), cutoff frequency (-3dB fc), and capacitor charging/discharging voltage over time.

Sheet Metal Bend Allowance & Flat Pattern Calculator

fabrication

Calculate Bend Allowance (BA), Bend Deduction (BD), Setback, and Flat Pattern blank layout for sheet metal press brake forming.

Structural Beam Deflection & Bending Stress Calculator

structural

Calculate maximum deflection and bending stress for simply supported and cantilever beams under point and distributed loads.

HVAC Cooling Load & Air Conditioner Tonnage Calculator

hvac

Calculate room cooling load in BTU/hr and HVAC air conditioning tonnage sizing based on room dimensions and insulation.

Pipe Friction Pressure Loss & Head Loss Calculator (Hazen-Williams)

plumbing

Calculate hydraulic head loss in meters/feet and pressure drop in PSI/bar across pipes using the Hazen-Williams equation.

Welding Wire, Electrode & Shielding Gas Consumption Estimator

fabrication

Estimate MIG wire weight in kg, stick electrode consumption, and shielding gas volume in liters for fabrication joints.

SMD Resistor Code Calculator & Decoder (3-Digit, 4-Digit, EIA-96)

electronics

Decode surface-mount SMD resistor markings (3-digit, 4-digit, EIA-96, and decimal R notation) into exact Ohms and tolerance.

Gear Ratio, Speed & Torque Calculator

Calculate gear transmission reduction ratio, driven gear RPM, and torque multiplication from tooth counts.

Hydraulic Cylinder Force & Speed Calculator

Calculate hydraulic piston extension and retraction force (kN/tons) and operating speed from bore and pressure.

Brickwork, Masonry & Mortar Quantity Calculator

civil-construction

Calculate required number of bricks, cement bags, and sand volume for masonry walls.

Concrete Mix Ratio & Material Volume Calculator (M15, M20, M25)

civil-construction

Calculate cement bags, sand tons, and coarse aggregate for concrete slabs, columns, and beams.

Flooring & Wall Tile Quantity & Box Calculator

civil-construction

Calculate total floor and wall tiles, boxes needed, and adhesive mortar with wastage.

Wall Paint Coverage & Primer Volume Calculator

civil-construction

Estimate liters of wall paint and primer required based on room dimensions and coats.

Wall Plastering Material & Cement Mortar Calculator

civil-construction

Calculate cement bags and sand volume for internal (12mm) and external (20mm) wall plaster.

Reinforcement Steel Rebar Weight & Length Estimator

civil-construction

Calculate steel rebar weight (kg & tons) from bar diameter (D²/162 formula) and length.

Home Construction & Civil Material Estimation Toolkit

workflows

Comprehensive building estimation suite: Calculate bricks, concrete, tiles, paint, plaster, and rebar.