Engineering & Science calculators
Choose a task below. Check each calculator’s assumptions and units before using its result.
Battery C-Rate & Peukert Runtime Calculator
Determine discharge current from C-rate, Peukert exponent derating ($t = H(C/IH)^k$), effective usable capacity, and full charge duration.
Battery Pack Series-Parallel Sizing Calculator
Determine battery pack configuration ($N_s \times N_p$), nominal voltage, total energy storage (kWh), internal resistance, and BMS passive cell balancing bleed duration.
Battery SEI Growth & Capacity Fade Calculator
Compute Solid Electrolyte Interphase (SEI) parabolic growth, loss of active lithium inventory (LLI), calendar capacity degradation, and Arrhenius temperature acceleration.
Battery SOC & Coulomb Counting Calculator
Compute battery State of Charge ($SOC$), Coulomb counting integration error, Open Circuit Voltage ($OCV$) correlation, and Kalman filter correction thresholds.
Battery Thermal Runaway Heat Calculator
Calculate irreversible Joule heating, reversible entropic heat ($T \cdot \Delta S$), total heat dissipation per Bernardi's equation, and runaway self-heating onset.
BCS Superconductor Energy Gap Calculator
Superconductivity & condensed matter physics: Calculate Bardeen-Cooper-Schrieffer (BCS) energy gap ($\Delta(T)$), thermodynamic critical magnetic field ($H_c(T)$), condensation energy, and penetration depth.
Bearing Fault Frequency BPFO BPFI Calculator
Calculate exact kinematic rolling element defect frequencies for vibration spectrum analysis and peak identification per ISO condition monitoring standards.
Beer Carbonation Pressure Calculator - CO2 Volumes Chart
Model equilibrium head pressure, Henry’s law gas solubility, temperature adjustments, and counter-pressure isobaric transfers for bright tanks and kegging.
Beggs and Brill Multiphase Flow Regime Calculator
Identify multiphase pipeline flow patterns (Segregated, Intermittent Slug, Distributed) and calculate in-situ inclined liquid holdup per the Beggs and Brill method (SPE 4007).
Beggs-Brill Multiphase Flow Calculator
Subsea Pipeline Hydraulics: Predict two-phase flow regime, liquid holdup correction for pipe inclination, and hydrostatic vs. frictional pressure gradients.
Beggs-Brill Multiphase Flow Holdup Calculator
Multiphase Pipeline Hydraulics: Calculate liquid holdup ($H_L$), flow pattern regime, mixture density ($\rho_m$), and hydrostatic pressure gradients.
Belt Conveyor Power Calculator - CEMA Tension Sizing
Calculate CEMA effective tension (Te), slack-side tension (T2), drive pulley power, and motor size for bulk material belt conveyors per CEMA 7th Edition.
Belt Tension Frequency Calculator - V-Belt Span Tuning
Calculate natural acoustic resonant frequency (Hz), static strand tension (lbf), and force-deflection values for V-belts and synchronous timing belts using transverse wave vibration theory.
Betatron Tune & Chromaticity Calculator
Beam Optics & Lattice Design: Evaluate horizontal/vertical betatron tunes ($\nu_x, \nu_y$), natural chromaticity ($\xi_{nat}$), sextupole correction, and working point stability.
Bi-Elliptic Transfer Delta-V Calculator
Advanced Astrodynamics: Evaluate three-impulse bi-elliptic transfer maneuvers vs Hohmann transfers across intermediate apogee ratios ($r_b / r_1$).
Bi-Elliptic Transfer Delta-V Calculator
Space mission astrodynamics: Compute 3-impulse bi-elliptic transfer $\Delta v$, intermediate apoapsis ($r_b$), transfer time, and evaluate Delta-V savings vs Hohmann transfer.
Bi-Elliptic vs Hohmann Delta-V Calculator
Orbital mechanics: Compare total $\Delta V$ budgets and time-of-flight between classic two-impulse Hohmann transfers and three-impulse Sternfeld bi-elliptic transfers across extreme orbital radius ratios.
Bieniawski Coal Pillar Strength Calculator
Underground Coal Mining Geomechanics: Calculate ultimate pillar compressive strength ($\sigma_p$), tributary overburden stress ($\sigma_v$), and safety factors ($SF$).
Binary Geothermal ORC Power Calculator
Low-to-Medium Enthalpy Resources: Calculate organic Rankine cycle (ORC) gross/net electrical output, working fluid flow rate, and reinjection temperature.
Binary ORC Geothermal Calculator - Organic Rankine Cycle
Determine thermal efficiency, gross and net electrical generation (MWe), and heat exchanger pinch limits for low-to-medium enthalpy geothermal brine.
Bingham Plastic Mud Rheology Calculator - PV YP Sizing
Compute Plastic Viscosity (PV), Yield Point (YP), Apparent Viscosity (AV), and Bingham shear stress profiles from standard API rotational viscometer dial readings.
Biopharma SIP Sterilization F0 Calculator
Aseptic Processing & Validation: Calculate thermal sterilization lethality ($F_0$), cumulative log reduction of resistant bacterial spores, and Sterility Assurance Level (SAL).
Bioreactor Impeller Power Draw Calculator
Biochemical engineering & hydrodynamics: Calculate impeller Reynolds number (Re), ungassed power (P₀), gassed power draw (P_g), and tip speed shear velocity.
Bioreactor kLa Oxygen Transfer Calculator
Bioprocess & fermentation engineering: Calculate volumetric oxygen transfer coefficient (kLa), Oxygen Uptake Rate (OUR), Oxygen Transfer Rate (OTR), and critical DO limit.
Bipod Flexure Mount Compliance Calculator
Precision Space Optics: Determine axial strut stiffness ($k_{axial}$), transverse bending compliance, thermal decoupling ratio, and assembly resonant frequency.
Bishop Simplified Slope Stability Calculator
Geotechnical slope stability: Determine the Factor of Safety ($FS$) against rotational circular failure using Bishop's Simplified Method of Slices and effective stress analysis.
Bistatic RCS & Forward Scattering Calculator
Anti-stealth radar & forward scattering: Calculate bistatic radar cross section ($\sigma_B$), Kell bistatic equivalence, and Babinet optical forward-scattering shadow peaks ($\sigma_{FS}$).
Blade Element Momentum BEM Calculator
Rotor aerodynamics & blade design: Calculate axial induction factor (a), tangential induction factor (a'), Glauert turbulent wake state correction, and Prandtl tip loss.
Blown Film Blow-Up Ratio Calculator
Blown film line kinematics: Calculate Blow-Up Ratio (BUR), Take-Up Ratio (TUR), final film gauge thickness (\(t_f\)), and frost line cooling parameters.
Boiler Acid Dew Point & Cold End Corrosion Calculator
Determine sulfuric acid vapor condensation temperature ($T_{adp}$), flue gas $SO_3$ concentration, and air preheater minimum metal temperature margin.
Boiler Blowdown Calculator - Cycles of Concentration Sizing
Compute boiler continuous surface blowdown rate, cycles of concentration (COC), blowdown thermal energy losses, and heat recovery savings per ABMA standards.
Boiler Combustion Calculator - Stack Loss Efficiency
Determine industrial boiler thermal efficiency using the ASME PTC 4 indirect loss method, including dry gas loss, hydrogen moisture loss, and economizer savings.
Boiler Combustion Efficiency Calculator - Stack Excess Air
Calculate excess air from stack flue gas oxygen, sensible stack losses, fuel moisture losses, and monetary savings from tuning burner air-fuel ratio.
Boiler Condensate Recovery Calculator - Fuel Savings
Model thermal fuel savings, makeup water reduction, sewer fee avoided costs, and chemical savings achieved by increasing boiler condensate return percentage.
Boiler Deaerator Calculator - Steam Mass Balance
Model deaerator pegging steam demand, mixed feedwater temperature, incoming makeup flow, and ASME storage tank retention volume.
Boiler Deaerator Steam Calculator - Mass Balance Sizing
Compute deaerator pegging steam consumption, makeup water heating demand, and dissolved oxygen removal to < 7 ppb per ASME PTC 12.3 standards.
Boiler Excess Air Calculator - Flue Gas O2 & Efficiency
Determine percent excess air from dry stack oxygen (O2), stoichiometric air-fuel ratio, and quantify sensible stack heat losses via the Siegert equation.
Boiler Feedwater Pump Calculator - BFP Hydraulic Power NPSH
Calculate boiler feedwater pump (BFP) total dynamic head, hydraulic liquid power, shaft brake horsepower, and electric motor sizing margins.
Boiler Natural Circulation Ratio & Head Calculator
Determine thermosiphon gravity driving pressure, circulation ratio ($CR = dot{m}_w / dot{m}_s$), riser void fraction, and waterwall DNB margin.
Boiler Safety Valve Relieving Capacity Calculator
Compute certified steam relieving capacity ($lb/hr$ or $kg/hr$), Napier formula sizing, orifice area selection, and $3\%$ accumulation limits per ASME Section I.
Boiler Tube Creep Life Larson-Miller Calculator
Estimate remaining creep life ($t_r$, operating hours) and Larson-Miller Parameter ($LMP$) for superheater and reheater alloy boiler tubes under thermal stress.
Bond Ball Mill Work Index Calculator - Grinding Energy
Calculate specific grinding energy (W), Rowland efficiency correction factors, required mill pinion motor power, and critical speed per Fred C. Bond theory.
Boron Dilution & Reactivity Insertion Calculator
Determine primary system boron concentration drop over time, reactivity insertion rate (pcm/min), and time to critical threshold.
Bosch DRIE Aspect Ratio Etch Calculator
MEMS & Semiconductor Micromachining: Model Bosch process Deep Reactive Ion Etching (DRIE), aspect-ratio-dependent etch lag (ARDE), scallop depth, and mask selectivity.
Bracelet Anode Resistance Calculator - McCoy Marine Sizing
Determine electrical discharge resistance (R_a) of half-shell bracelet sacrificial anodes on subsea pipelines per the McCoy formula and DNV-RP-F103.
Brayton Cycle Gas Turbine Efficiency Calculator
Determine thermodynamic net specific work ($w_{net}$), thermal efficiency ($\eta_{th}$), back work ratio ($BWR$), and heat rate across simple and recuperated gas turbine cycles.
Brewery Glycol Chiller Calculator - Cellar Cooling Load
Size commercial brewery chillers, propylene glycol reservoirs, and cellar pump flow rates across fermentation holding, cold crashing, and wort knockout.
Bridge Deck Flutter Velocity Calculator
Bridge Aeroelastics: Compute critical flutter onset wind speed ($V_{cr}$), frequency ratio ($\omega_T/\omega_B$), and mass moment of inertia using Selberg’s formula.