What engineering calculators are available?

AI Calculator offers 203 precision engineering calculators across 6 disciplines: Electrical (53 — Ohm's Law, cable sizing, power factor correction, short circuit analysis, transformer sizing, motor starting, earth fault loop, lighting lux & protection coordination), Mechanical (44 — torque, HVAC load, duct sizing, pipe flow, pump sizing, heat exchangers, thermodynamics), Civil & Construction (54 — beam analysis, concrete design, structural, geotechnical, surveying, roads), Chemical (18 — reactions, thermodynamics, separations, transport phenomena), Physics (17 — kinematics, optics, electromagnetism, quantum, relativity), Electronics (17 — op-amps, 555 timer, PCB design, semiconductors, SMPS, battery sizing). All verified against IEC, ASME, ACI & NEC standards.

What unit conversions are supported?

AI Calculator supports 17 unit conversion categories: Length (12 units), Weight/Mass (11 units), Temperature (4 units), Area (10 units), Volume (15 units), Speed (7 units), Time (12 units), Digital Data (11 units), Energy (10 units), Pressure (9 units), Angle (6 units), Frequency (5 units), Fuel Economy (4 units), Power (6 units), Force (5 units), Cooking (10 units), and Numeral Systems (5 units).

Is the AI Calculator free to use?

Yes, AI Calculator is completely free. It includes all 203 Engineering Calculators, 17 unit converters, scientific calculator, financial calculator, health calculator, and programmer calculator with no registration or payment required.

What calculation modes are available?

AI Calculator offers 7 calculation modes: Engineering (203 precision calculators across 6 disciplines), Basic Calculator (arithmetic operations with AI natural language input), Unit Converter (17 categories with instant conversion), Scientific (trigonometric, logarithmic, and advanced math functions), Financial (loan EMI, SIP, compound interest, tax planning), Health (BMI, BMR, body fat percentage, calorie needs), and Programmer (hexadecimal, octal, binary conversions with bitwise AND, OR, XOR, NOT, shift operations).

AI Calculator | 203 Engineering & Science Tools

203 Precision Engineering Calculators

AI Calculator provides 203 free precision engineering calculators organised across 6 professional disciplines — Electrical (incl. cable sizing), Mechanical (incl. HVAC & piping), Civil & Construction, Chemical, Physics and Electronics — designed for engineers, students, and technical professionals worldwide. All calculations verified against IEC, ASME, ACI & NEC standards.

Electrical Engineering (53 Calculators)

Ohm's Law Calculator, Power Factor Calculator, Short Circuit Calculator, Transformer Sizing Calculator, Motor Starting Current Calculator, Voltage Divider Calculator, 3 Phase Power Calculator, Earth Fault Loop Impedance, Lighting Lux Level Calculator, and Protection Discrimination Analysis.

Cable Sizing (15 Calculators)

Voltage Drop Calculator, Current Carrying Capacity & Cable Sizing, Cable Derating Factors, Cable Tray Fill Ratio, Conduit Fill Calculator, Pulling Tension Analysis, Minimum Bend Radius, Cable Weight Calculator, Drum Length Calculator, Circuit Breaker Sizing, Fuse Rating Calculator, Cable Life Expectancy, Parallel Cable Calculator, Harmonic Derating, and Emergency Overload Rating.

Cable Accessories (15 Calculators)

Cable Gland Selection (A2, CW, BW, E1W, E1FW, D1FW types), Cable Lug Sizing, Termination Kit Selection, Gland Plate Layout, Stuffing Gland Calculator, and more cable accessory tools for industrial installations.

Mechanical Engineering (44 Calculators)

Torque Calculator, Gear Ratio Analysis, Belt Drive Calculator, Spring Constant, Bearing Life Calculator, Shaft Design, and Flywheel Energy Storage.

Civil Engineering (54 Calculators)

Beam Deflection Calculator, Concrete Mix Design, Soil Bearing Capacity, Retaining Wall Calculator, Slope Stability, Foundation Load Calculator, Rebar Calculator, Column Design, Surveying & Roads.

Chemical Engineering (18 Calculators)

Molarity Calculator, pH Calculator, Dilution Calculator, Ideal Gas Law, Mass Balance, Chemical Dosing Calculator, and Heat of Reaction.

Physics (17 Calculators)

Projectile Motion Calculator, Simple Pendulum, Wave Properties, Thermodynamics Calculator, Kinetic Energy, Gravitational Force, and Electric Field Strength.

Electronics (17 Calculators)

Resistor Color Code Decoder, RC Time Constant, RL Circuit Calculator, Op-Amp Gain Calculator, BJT Transistor Calculator, and LED Resistor Calculator.

Hydraulics (now integrated into Mechanical)

Pipe Flow Calculator, Pump Head Calculator, Bernoulli's Equation Solver, Valve Coefficient (Cv) Calculator, and Reynolds Number Calculator.

HVAC (integrated into Mechanical)

Heat Load Calculator, HVAC Duct Sizing Calculator, Refrigeration Capacity, Heat Exchanger Calculator, Air Changes per Hour (ACH), and Psychrometric Calculator.

17 Unit Conversion Categories

Comprehensive unit converter supporting Length, Weight/Mass, Temperature, Area, Volume, Speed, Time, Digital Data, Energy, Pressure, Angle, Frequency, Fuel Economy, Power, Force, Cooking Measurements, and Numeral Systems with instant bidirectional conversion and formula display.

Additional Calculator Modes

Basic Calculator with AI natural language processing, Scientific Calculator with trigonometric and logarithmic functions, Financial Calculator for loan EMI, SIP returns, compound interest, and tax planning, Health Calculator for BMI, BMR, body fat percentage, and daily calorie needs, and Programmer Calculator with hexadecimal, octal, and binary conversions plus bitwise AND, OR, XOR, NOT, and shift operations.

Professional PDF Report Export

All 203 engineering calculators support professional PDF report generation with branded header, detailed input parameters, calculation results with engineering units, unique document reference number, timestamp, and standard engineering disclaimer. Reports can be printed directly or saved as PDF files for documentation and compliance purposes.

Why Engineers Trust AI Calculator

AI Calculator is designed for professional engineers, students, and technical professionals who need accurate, standards-compliant calculations. Every calculator is verified against the latest international standards including IEC 60364 (Low-Voltage Installations), IEC 60909 (Short-Circuit Currents), ASME (Mechanical Engineering), ACI 318 (Concrete Design), NEC (National Electrical Code), and BS 7671 (18th Edition). All professional PDF reports include branded headers with QR codes for easy sharing.

Frequently Used Engineering Calculators

Cable Sizing Calculator

Our IEC 60364-compliant cable sizing calculator determines the correct cable cross-section based on current capacity, voltage drop limits, and short-circuit withstand. Supports single-phase, three-phase, and DC systems with automatic derating factor calculation for temperature, grouping, and installation method.

Voltage Drop Calculator

Calculate voltage drop for any cable run using the Darcy method. Supports copper and aluminium conductors, all standard cable sizes from 1.5mm� to 630mm�, and checks compliance with IEC 60364 limits (3% for lighting, 5% for power).

Ohm's Law Calculator

Solve any two of voltage, current, resistance, and power using Ohm's Law (V=IR) and the power equation (P=IV). Instant results with unit conversion and PDF export.

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