Calculators Archive • Page 3 of 6 • Vibromera

Proximity Probe Gap Voltage Calculator | Eddy Current Setup | Free Online Tool

Free online eddy current proximity probe gap voltage calculator. Calculate gap distance, output voltage, and linearity range for shaft vibration and position measurements.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Propeller Unbalance Calculator | Marine Shaft Vibration

Free online calculator for propeller unbalance and centrifugal force. Enter propeller mass, blades, diameter, shaft speed, and balance grade to get permissible unbalance per ISO 21940.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Pressure Vessel Design Calculator | EN 13445 / ASME VIII | Free Online Tool

Free online pressure vessel wall thickness calculator per EN 13445 and ASME VIII Div.1. Calculate required thickness for cylindrical shells, hemispherical, ellipsoidal, and flat heads.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Pressure Vessel Calculator | Thin-Wall Hoop & Longitudinal Stress | Free Online Tool

Free thin-wall pressure vessel calculator. Hoop stress σh=PD/(2t), longitudinal stress σl=PD/(4t). Enter pressure, diameter, wall thickness.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Pressure Unit Converter | bar ↔ PSI ↔ MPa ↔ atm ↔ kgf/cm²

Free online pressure unit converter. Convert between bar, PSI, MPa, kPa, Pa, atm, kgf/cm², mmHg, inHg, mbar, mmH₂O, and inH₂O. Instant results for all units simultaneously.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Press Force Calculator | Blanking & Punching | F = L × t × τ

Free press force calculator for blanking and punching operations. F = perimeter × thickness × shear strength. Enter workpiece dimensions and material to get required tonnage.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Press Fit / Interference Fit Calculator | Free Tool #076

Interference fit calculator using Lame equations. Calculate contact pressure, grip force, and grip torque from shaft OD, hub ID/OD, length, material properties.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Predictive Maintenance ROI Calculator | Free Tool

Calculate ROI of predictive maintenance. ROI = (savings - cost) / cost × 100. Payback period.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Power Unit Converter | kW ↔ hp ↔ PS ↔ BTU/h | Free Online

Free online power unit converter. Convert between kW, W, hp (mechanical), PS (metric horsepower), BTU/h, ft·lbf/s, kcal/h, and torque×RPM. Instant results.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Power Factor Correction Calculator | Qc = P×(tanφ1−tanφ2) | Free Online Tool

Free online power factor correction calculator. Calculate required capacitor kVAR and μF to improve power factor. Qc = P × (tan φ1 − tan φ2).

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Pneumatic Cylinder Response Time Calculator | Stroke Time | Free Online Tool

Free online pneumatic cylinder response time calculator. Estimate stroke time from bore, stroke length, pressure, load, and port size using simplified flow/force model.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Pneumatic Cylinder Force & Speed Calculator | Free Online Tool

Free online pneumatic cylinder calculator. Compute extend and retract force (F=P×A), piston speed from flow rate. Enter bore, rod diameter, and pressure.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Pipe Wall Thickness Calculator | Barlow’s Formula | Free Online Tool

Free pipe wall thickness calculator using Barlow's formula: t=PD/(2S). Enter pressure, pipe OD, allowable stress, and weld factor to find minimum wall thickness.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Pipe Thread Converter BSP/BSPT | ISO 228/ISO 7 | Free Online Tool

Free BSP/BSPT pipe thread reference tool per ISO 228 and ISO 7-1. Select thread size to view OD, TPI, pitch, and tapping drill for parallel and taper threads.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Pipe Support Spacing Calculator | Maximum Span

Calculate maximum pipe support spacing based on pipe size, material, schedule, fluid density and insulation. Simply supported and continuous beam deflection limits.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Pipe Pressure Drop Calculator | Darcy-Weisbach & Colebrook-White | Free Online Tool

Free pipe pressure drop calculator using Darcy-Weisbach equation with iterative Colebrook-White friction factor. Supports laminar and turbulent flow, minor losses, multiple pipe materials.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Pipe Flow Velocity Calculator | v = 4Q/(πd²) | Reynolds Number | Free Online Tool

Free pipe flow velocity calculator. Compute v = 4Q/(πd²), Reynolds number, flow regime. Check velocity against hydraulic system recommendations. Supports metric and imperial units.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Pipe Thermal Expansion & Flexibility Calculator | EN 13480 | Free Online Tool

Free online pipe thermal expansion and flexibility calculator per EN 13480. Calculate thermal expansion, required expansion loop dimensions, and stress check for piping systems.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Pipe Diameter from Flow Rate Calculator | Standard Sizes DN | Free Online Tool

Free pipe diameter calculator. Calculate minimum pipe ID from flow rate and velocity limit. Round up to standard DN sizes. Reverse: max flow for given pipe size. Economic velocity concept.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Paper Machine Roll Balance Calculator | Grade & Tolerance

Free online paper machine roll balance calculator. Calculate operating RPM from surface speed, permissible unbalance per ISO 21940, centrifugal force, and correction mass for paper rolls.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

O-Ring Size Selection | ISO 3601 | Free Online Tool

Free online O-ring size selection tool per ISO 3601. Find the right O-ring ID, cross-section, groove dimensions, squeeze percentage for piston, rod, and face seal applications.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Orifice Plate Flow Calculator ISO 5167 | Free Online Tool

Free orifice plate flow calculator per ISO 5167. Enter orifice diameter, pipe diameter, differential pressure, and fluid density. Q=C×ε×A×√(2ΔP/ρ).

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Oil Viscosity–Temperature Calculator | Walther Equation | VI | Free Tool

Free oil viscosity calculator using the Walther (ASTM D341) equation. Calculate kinematic viscosity at any temperature. Viscosity Index per ASTM D2270. ISO VG classes. Pour point estimation.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Oil Viscosity Classes | ISO VG | ISO 3448

Free online ISO VG viscosity class lookup per ISO 3448. Enter kinematic viscosity at 40°C to find the matching ISO VG class, or select a class to see the viscosity range. Complete reference table VG2–VG1500.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Oil Change Interval Calculator | Adjustment Factors | Free Tool

Calculate adjusted oil change interval based on operating temperature, contamination, load severity, oil type, and filter quality. Cost comparison and oil analysis recommendations.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Ohm’s Law Calculator | Voltage, Current, Resistance, Power | Free Online Tool

Free online Ohm's Law calculator. Enter any two of Voltage (V), Current (A), Resistance (Ω), or Power (W) to calculate the rest. Includes conductance and energy.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

OEE Calculator | Overall Equipment Effectiveness | Free Tool

Calculate OEE = Availability × Performance × Quality. Compare against world-class benchmark of 85%.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Nut Strength Class ISO 898-2 Lookup | Free Online Tool

Free online ISO 898-2 nut strength class reference. Enter nut class to see proof load stress, hardness ranges, and matching bolt property class.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Weld Strength Calculator | Fillet & Butt Weld | Free Online Tool

Free online calculator for fillet and butt weld strength. Enter weld type, throat size, length, load, and material to check stress against allowable limits.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

NPSH Calculator — Net Positive Suction Head | Free Online Tool

Free online npsh calculator — net positive suction head. Calculate NPSHa from suction conditions. Prevent cavitation.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Nominal Bore Converter | DN ↔ NPS ↔ inch ↔ mm | ISO 6708

Free online DN nominal bore converter. Cross-reference DN (Nominal Diameter), NPS (Nominal Pipe Size), inch fraction, and actual OD in mm per ISO 6708 / ASME B36.10.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Noise Level Addition Calculator | Combine dB Sources | Free Tool

Free noise level addition calculator. Sum up to 8 noise sources in dB/dBA. L_total = 10×log10(Σ10^(Li/10)). Logarithmic addition of sound pressure levels.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Noise Exposure Calculator — Permissible Time & Dose (EU/OSHA)

Calculate permissible noise exposure time and dose per EU Directive 2003/10/EC and OSHA standards. Enter noise level in dBA and exposure time. Color-coded risk assessment.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Noise Distance Attenuation Calculator | L₂ = L₁ − 20·log(d₂/d₁)

Free noise distance attenuation calculator. Calculate sound level at any distance using the inverse square law: L2 = L1 − 20·log10(d2/d1).

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

NDT Method Selector | ISO 9712 | Non-Destructive Testing Guide

Free NDT method selector tool. Choose what to inspect, defect type, and material to get ranked recommendations for UT, RT, MT, PT, ET, VT with ISO standards and required qualification levels.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Natural Frequency Calculator (Mass-Spring System)

Calculate the natural frequency of a mass-spring system. Enter mass and spring stiffness to get frequency in Hz, angular frequency, period, and static deflection.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

MTBF MTTR Availability Calculator | A = MTBF/(MTBF+MTTR)

Calculate MTBF, MTTR and availability. A = MTBF/(MTBF+MTTR). Also failure rate λ = 1/MTBF.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Motor Winding Resistance Calculator | Temperature Correction

Free online motor winding resistance temperature correction calculator. Correct resistance readings for copper and aluminum conductors per IEEE/IEC standards. Phase unbalance check.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Motor Torque from Current Calculator | T = P×9549/n | Free Online Tool

Free online motor torque calculator. Convert current to power to torque: T = P × 9549 / n. Chain calculation: I → P → T for three-phase motors.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Motor Starting Current Calculator | I_start = k × I_rated | Free Online Tool

Free online motor starting current calculator. Compute inrush current for DOL, star-delta, soft starter, and VFD methods. I_start = k_start × I_rated.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Motor Slip & Actual RPM Calculator | Induction Motor | Free Online Tool

Free online motor slip calculator. Calculate synchronous speed, actual RPM, slip percentage, and slip frequency for induction motors. Supports 50Hz and 60Hz, 2 to 12 poles.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Motor Sizing Calculator | Load → Motor Selection

Free motor sizing calculator. Enter load type, torque/power, speed, duty cycle and get recommended motor size from standard IEC range 0.37-315 kW with starting current and torque estimates.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Motor Nameplate Decoder | IEC 60034-1 | Read Any Motor Plate

Decode any electric motor nameplate. Enter rated power, voltage, current, frequency, poles, RPM, cos φ, IE class, insulation class, IP rating, duty cycle and frame size. Get synchronous speed, slip, efficiency, torque and more.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Motor Nameplate Current Calculator | FLA from Power | Free Online Tool

Free online motor nameplate current (FLA) calculator. I=P/(√3×V×cosφ×η) for 3-phase, I=P/(V×cosφ×η) for 1-phase. Calculate full-load amps from nameplate data.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Motor Electrical Defect Frequency Calculator

Free online motor electrical defect frequency calculator. Compute synchronous speed, slip, 2× line frequency, pole pass frequency, rotor bar pass frequency, and sidebands for motor diagnostics.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Motor Efficiency Calculator | IE1–IE5 Savings | IEC 60034-30-1

Free motor efficiency calculator per IEC 60034-30-1. Compare IE1–IE5 efficiency classes, calculate annual energy cost and savings from upgrading motor efficiency class.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Motor Capacitor Calculator | Single-Phase Motor C = I/(2πfV) | Free Online Tool

Free online single-phase motor capacitor calculator. Calculate start and run capacitor values. C = I/(2πfV). Inputs: motor power, voltage, frequency.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Metric Thread Dimensions Calculator | ISO 261/724

Free online calculator for metric thread dimensions per ISO 261 and ISO 724. Get pitch diameter, minor diameter, stress area, core area for M3–M48 coarse and fine pitch threads.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Metal Weight Calculator | Pipe, Round Bar, Flat, Sheet, Angle

Free online metal weight calculator. Calculate weight of round bar, pipe, flat bar, square bar, hex bar, angle (L-profile), and channel (U-profile) in steel, stainless, aluminum, copper, brass, titanium.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Measurement Uncertainty Calculator | ISO 17025 / GUM

Free measurement uncertainty calculator per ISO 17025 / GUM. Enter uncertainty sources (Type A and B), calculate combined and expanded uncertainty with coverage factor k=2 (95%).

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Calculators

Engineering calculators for vibration analysis and mechanical engineering