Acoustics & Vibration Lab
Simulate soundwaves, calculate octave frequency band ranges, model reverberant spaces, evaluate sinusoidal mechanical structures, and sum logarithmic decibels.
Sound Pressure Level (SPL)
Convert sound pressure from Pascals to decibels (dB SPL). Sum incoherent noise sources and model distance-based inverse-square law attenuation.
Explore Additional Utilities
Script Character ↔ Word Counter
Analyze characters, spaces, punctuation, words, and word density. Convert text density predictions between CJK and Latin scripts.
pH adjustment — acid/alkali drops ↔ pH change estimate
Estimate acidifying or alkalizing solution amounts to safely adjust formulation pH values.
Glaze specific gravity ↔ pint weight — glaze consistency
Convert glaze liquid specific gravities to US/Imperial pint weights and calculate suspended dry material volumes.
Gear ratio ↔ final drive speed — RPM at given speed
Calculate vehicle road speed or engine RPM based on transmission gear ratios, final drive axle ratio, and tire dimensions.
Kite size — wind speed ↔ rider weight
Calculate the recommended kite size in square meters (m²) based on rider weight and wind speed.
Flow velocity — pipe diameter + flow rate → m/s
Calculate average fluid flow velocity from pipe size or inner diameter and volumetric flow rate values.
Mortar mix ratio — cement ↔ sand ↔ water by weight
Calculate standard masonry mortar mix classes (Type M, S, N, O, K) and determine precise cement, sand, and water weights.
Aviation Fuel Weight Calculator
Calculate volume-to-weight changes for standard aviation fuels (Jet A-1, Avgas) across metric and imperial systems.
Drain slope — mm per meter ↔ inches per foot
Convert drainage slope units and calculate vertical height drops across horizontal sewage pipes run lengths.
Concrete strength — MPa ↔ psi ↔ N/mm²
Convert concrete compressive strength between MPa, psi, and N/mm². View typical application guidelines and concrete classes.
CPU clock cycles ↔ instructions per second
Translate CPU frequencies, core counts, and performance CPI/IPC values into Millions of Instructions Per Second (MIPS).
Viscosity — cosmetic grade cps ↔ product texture description
Map centipoise (cPs) values to tangible product textures and view standard cosmetic grade shear behaviours.
IBU ↔ bitterness ratio — hop bitterness vs malt sweetness
Calculate the BU:GU bitterness ratio by comparing hop Bitterness (IBU) against malt sweetness (Gravity Units).
Engine power ↔ hull speed — planing vs displacement
Estimate maximum displacement hull speeds (LWL formula) or calculate planing hull speeds using Crouch's classic marine formula.
BPM ↔ Milliseconds Calibrator
Convert beats per minute (BPM) to millisecond delay values and frequency hertz.
Standing timber volume — DBH + height → cubic meters
Calculate merchantable standing timber volume in cubic meters or board feet using Doyle, Scribner, or International rules.
Premium Rate ↔ Sum Insured
Calculate basic insurance premium rates, loading factors, and sum insured relationships (percentage, permille, and absolute values).
Spring rate — lb/in ↔ N/mm — suspension setup
Convert suspension coil spring stiffness between lb/in and N/mm. Estimate coil spring rates using wire diameter, coil diameter, and active counts.
Tree diameter ↔ basal area — forestry measurement
Convert tree breast height diameters to single tree basal area or estimate stand basal area densities per acre or hectare.
Dimensional Weight ↔ Chargeable Weight
Calculate shipping dimensional weight based on L x W x H using standard carrier factors, and determine final chargeable weight.