All engineering calculators, A to Z
All 179 calculators and 12 unit converters in one list. Type to narrow it down, or jump to a letter.
191 in all
A
- Added resistance in waves (STAwave-1)Maritime
- Admiralty coefficient and speed–power scalingMaritime
- Air changes per hour (ACH) and CFM calculatorHVAC and building services
- Air density calculatorHVAC and building services
- Air draft and bridge clearanceMaritime
- Alternative fuel tank volumeMaritime
- Amps to kWElectrical
- Amps to wattsElectrical
- Anchor cable catenary and scopeMaritime
- AWG wire gauge chart and converterElectrical
B
- Ballast water exchange timeMaritime
- Bar to psi converterConverters
- Battery capacity and runtimeElectrical
- Battery charge timeEnergy and renewables
- Beam deflection and bending stressStructural
- Beaufort, wind speed and sea state converterMaritime
- Bernoulli's equation and venturiFluids and pumps
- Berthing energy and fender selectionMaritime
- Bilged compartment (lost buoyancy)Maritime
- Bollard pull for a towMaritime
- Bolt torque and preloadMechanical
- Breaker size calculatorElectrical
- BTU calculator: AC size for a roomHVAC and building services
- BTU/h to kW converterConverters
- Building heat loss calculator (U-values)HVAC and building services
- Bunker quantity and density correctionMaritime
C
- Cable short-circuit withstandElectrical
- Cable sizing and voltage dropElectrical
- Cargo securing (CSS Code Annex 13)Maritime
- Cargo tank heating time and steamThermal
- Cargo ventilation and dew pointMaritime
- Carnot efficiency and COP calculatorThermal
- Cathodic protection anodesMaritime
- CFM to m³/h converterConverters
- Charter party performance claimMaritime
- CII rating estimatorMaritime
- Column buckling (Euler and Johnson)Structural
- Compass error by amplitude or azimuthMaritime
- Concrete bag calculatorCivil
- Concrete column and post hole calculatorCivil
- Concrete footing calculatorCivil
- Concrete slab calculatorCivil
- Concrete volume and rebar weightCivil
- Conduit fill calculator (NEC)Electrical
- Control valve Cv / Kv sizingFluids and pumps
- Course to steer with set and driftMaritime
- CPA and TCPA from radar plotsMaritime
- Crane outrigger pad bearing pressureCivil
- cSt to SSU viscosity converter (Saybolt seconds)Fluids and pumps
D
- Density unit converterConverters
- Dew point calculatorHVAC and building services
- Draft surveyMaritime
- Dry-docking critical instantMaritime
- Duct size calculatorHVAC and building services
E
- Earthwork cut and fill volumesCivil
- Electricity cost and energy useEnergy and renewables
- Enclosed space purge timeMaritime
- Energy unit converterConverters
- Energy-saving device paybackMaritime
- Engine BMEP, torque and powerMechanical
- Engine power and SFOC to ISO 3046 conditionsMechanical
- Engine-room ventilation (ISO 8861)Maritime
- Engineering unit converterGeneral
- EU ETS and FuelEU MaritimeMaritime
F
- Fillet weld strengthStructural
- Fixed CO₂ fire-extinguishing systemMaritime
- Flow rate and pipe velocityFluids and pumps
- Flow rate unit converterConverters
- Footing size calculatorCivil
- Force unit converterConverters
- Fuel blending and heating viscosityMaritime
- Fuel changeover before an ECAMaritime
- Fuel consumption and voyage costMaritime
- Fuel net specific energy and CO₂ factorMaritime
G
- Gear ratio, rpm and torqueMechanical
- Generator load sharing with droopElectrical
- Generator load, kVA and fuelElectrical
- Generator size calculatorElectrical
- GPM to L/min converterConverters
- Great-circle and rhumb-line distanceMaritime
- GZ curve and intact stability criteriaMaritime
H
- Hazen–Williams head loss calculatorFluids and pumps
- Heat exchanger effectiveness–NTU calculatorThermal
- Heat exchanger LMTDThermal
- Heat transfer calculator: conduction, convection, radiationThermal
- Holtrop–Mennen resistance and powerMaritime
- Hull roughness and fouling penaltyMaritime
- Hydraulic cylinder force and speedMechanical
- Hydrostatic pressure at depthFluids and pumps
- Hydrostatics basicsMaritime
I
- Ideal gas law (PV = nRT)Thermal
- Inclining experimentMaritime
- Initial stability GM and listMaritime
- Interference fitMechanical
K
- kg/cm² to psi converterConverters
- kg/m³ to lb/ft³ converterConverters
- Knots to mph converterConverters
- kPa to psi converterConverters
- kVA to ampsElectrical
- kVA to kWElectrical
- kW to ampsElectrical
- kW to hp converterConverters
- kW to kVAElectrical
L
- LED series resistorElectrical
- Length unit converterConverters
- Lifting sling and wire rope loadMechanical
- Light, radar and VHF rangeMaritime
- Lighting design (lumen method)Electrical
- Loading condition from an item listMaritime
M
- m/s to km/h converterConverters
- mAh to Wh battery capacityEnergy and renewables
- Mass moment of inertia calculatorMechanical
- Mass unit converterConverters
- Measurement uncertainty (GUM)General
- Mercator (rhumb-line) sailingMaritime
- Minor losses calculator (pipe fittings and valves)Fluids and pumps
- Moment of inertia calculator (section properties)Structural
- Mooring line and winch brake (MEG4)Maritime
- Motor starting current and voltage dipElectrical
- MPa to psi converterConverters
N
- N·m to ft-lb converterConverters
- Newtons to lbf converterConverters
- NOx tier limit by engine speedMaritime
O
- Ohm's law and electrical powerElectrical
- Open-channel flow (Manning)Civil
- Optimal hull cleaning intervalMaritime
- Optimal speed under charterMaritime
- Orifice and venturi flow (ISO 5167)Fluids and pumps
P
- Padeye design checkStructural
- Paint coverage and quantityMaritime
- Passage plan from waypointsMaritime
- Pipe and tank insulation heat lossThermal
- Pipe flow and pressure dropFluids and pumps
- Pipe volume and mass of contentsFluids and pumps
- Pipe wall thickness (ASME B31.3)Mechanical
- Power factor correctionElectrical
- Power unit converterConverters
- Pressure unit converterConverters
- Propeller curve and light running marginMaritime
- Propeller slip and speed through waterMaritime
- Psi to bar converterConverters
- Pump and fan affinity lawsFluids and pumps
- Pump NPSH and suction liftFluids and pumps
- Pump power calculatorFluids and pumps
Q
- Quick statistics of a seriesGeneral
R
- Rational-method runoffCivil
- RC time constant and filterElectrical
- Rebar weight and quantity calculatorStructural
- Reliability and redundancyGeneral
- Relief valve sizing (API 520)Fluids and pumps
- Resistor colour codeElectrical
- Retaining wall earth pressure calculator (Rankine)Civil
- Reynolds number and flow regimeFluids and pumps
- Roll period and synchronous rollingMaritime
- Rolling bearing L10 life (ISO 281)Mechanical
- Rotor sail (Flettner rotor) thrust and savingMaritime
S
- Sea state statisticsMaritime
- Series and parallel capacitorsElectrical
- Series and parallel resistorsElectrical
- Shaft torque, power and diameterMechanical
- Shallow water correction (Raven / Lackenby)Maritime
- Ship squat and under-keel clearanceMaritime
- Short-circuit current (IEC 60909)Electrical
- Sight reduction (intercept method)Maritime
- Slope calculator: percent, degrees, ratio and pitchCivil
- Snow load calculator (Eurocode and ASCE 7)Structural
- Soil bearing capacity calculator (Terzaghi and Eurocode 7)Civil
- Solar panel calculator: how many panels do I need?Energy and renewables
- Solar PV array and storage sizingElectrical
- Specific heat calculator (Q = mcΔT)Thermal
- Speed unit converterConverters
- Speed–power curve fitMaritime
- Spring rate calculator (helical compression spring)Mechanical
- Starting air receivers and compressorsMaritime
- Steam table calculator (IAPWS-IF97)Thermal
- Steel and metal weight calculatorStructural
- Steel beam size calculatorStructural
- Stiffener with attached platingStructural
T
- Tank sounding trim and heel correctionMaritime
- Tank volume and partial fillMechanical
- Temperature unit converterConverters
- Thermal expansion and restraint stressThermal
- Thin-wall pressure vesselMechanical
- Three-phase power and motor currentElectrical
- Tidal height (rule of twelfths)Maritime
- Tolerance stack-upMechanical
- Tons of refrigeration to kW converterConverters
- Torque unit converterConverters
- Torque, power and speedMechanical
- Total dynamic head (TDH) calculatorFluids and pumps
- Transformer size calculator (kVA)Electrical
- Trench and excavation volume calculatorCivil
- True wind from apparent windMaritime
- Truss calculator (Pratt, Howe, Warren)Structural
V
- Vibration isolation and severityMechanical
- Voltage dividerElectrical
- Volume unit converterConverters
W
- Wageningen B-series propellerMaritime
- Water hammer (Joukowsky)Fluids and pumps
- Water temperature and density correctionMaritime
- Watts to ampsElectrical
- Wave properties and encounter periodMaritime
- Weld fatigue damage (DNV-RP-C203)Structural
- Wind load calculator (Eurocode and ASCE 7)Structural
- Wind resistance (ISO 15016)Maritime
- Wire size calculator (AWG and mm²)Electrical