Calculators Archive

Flange Bolt Pattern Calculator | Free Online Tool

Free online calculator for flange bolt pattern loads. Enter pressure, gasket OD/ID, number of bolts, and bolt size to calculate per-bolt load and required preload.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

Washer Selection — ISO 7089/7090 Lookup | Free Online Tool

Free online washer selection tool per ISO 7089/7090. Enter bolt size to see flat washer ID, OD, thickness and spring washer dimensions.

By Nikolai Shelkovenko, 1 month ago February 15, 2026

Voltage Drop Calculator | Free Cable Sizing Tool | Vibromera

Free online voltage drop calculator. Compute cable voltage drop for single-phase and three-phase circuits. ΔV = k×ρ×I×L/A. Shows % drop and cable recommendations.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

Viscosity Converter | cSt ↔ cP ↔ SUS ↔ Pa·s

Convert between kinematic (cSt, m²/s) and dynamic (cP, Pa·s) viscosity. Needs density for cross-conversion.

By Nikolai Shelkovenko, 1 month ago February 15, 2026

Viscosity Converter | ISO VG ↔ SAE ↔ AGMA

Free online viscosity converter. Cross-reference between ISO VG, SAE crankcase, SAE gear, and AGMA viscosity grades. Convert cSt to cP, SUS (Saybolt). Complete equivalence table.

By Nikolai Shelkovenko, 1 month ago February 15, 2026

ISO 20816-1 Vibration Zones A/B/C/D Evaluation Tool

Free online vibration zone evaluation calculator per ISO 20816-1. Enter machine group and measured vibration to determine zone A/B/C/D with color-coded results and action recommendations.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

ISO 10816 Vibration Velocity Limits — Zone Calculator

Check permissible vibration velocity per ISO 10816 / ISO 20816. Select machine class, enter measured velocity to get zone evaluation A/B/C/D with color-coded results.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

Vibration Unit Converter: mm/s ↔ μm ↔ g ↔ dB | Vibromera

Free online vibration unit converter. Convert between velocity (mm/s), displacement (μm), acceleration (g, m/s²), and dB at any frequency. Instant results for all vibration units.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

Remaining Life from Vibration Trend | RUL Estimator

Free online tool to estimate remaining useful life (RUL) from vibration trending data. Uses linear, exponential, and power law growth models to project time to alarm and danger levels.

By Nikolai Shelkovenko, 1 month ago February 15, 2026

Vibration Transmissibility Calculator | Free Online Tool

Free online calculator for vibration transmissibility and isolation efficiency. Enter forcing frequency, natural frequency, and damping ratio to calculate transmissibility T and isolation percentage.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

Vibration Source Identifier by Frequency | Diagnostic Tool

Free interactive vibration diagnostic tool. Enter vibration frequency as order of running speed to identify likely fault sources: unbalance, misalignment, bearing defects, looseness, and more.

By Nikolai Shelkovenko, 1 month ago February 15, 2026

Vibration Severity Chart | ISO 10816 / 20816 Quick Reference

Interactive vibration severity chart per ISO 10816 and ISO 20816. Enter measured velocity (mm/s RMS), select machine class, and instantly see zone evaluation A/B/C/D with color-coded visual chart.

By Nikolai Shelkovenko, 1 month ago February 15, 2026

Vibration Sensor Sensitivity Calculator | Vibromera

Free online vibration sensor sensitivity calculator. Calculate output signal voltage from sensor sensitivity and vibration level. Supports accelerometers, velocity sensors, and proximity probes.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

Vibration Phase Angle Calculator | Free Vector Tool

Free online vibration phase angle calculator. Calculate relative phase, vector sum, and vector difference of two vibration signals with amplitude and phase.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

Overall Vibration Level Calculator | RMS from Spectrum

Free online calculator for overall vibration level from spectrum components. Enter up to 10 amplitude values to calculate RMS overall level and crest factor.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

Vibration Mount Selection Calculator | Free Online Tool #063

Free online vibration mount selection calculator. Enter machine mass, operating frequency, and target isolation percentage to determine required mount stiffness, number of mounts, and static deflection.

By Nikolai Shelkovenko, 1 month ago February 15, 2026

Gear Drive Vibration Limits — ISO 20816-9 Free Tool

Free online vibration zone evaluation calculator per ISO 20816-9 for gear drives. Evaluate bearing housing velocity against zone A/B/C/D limits for parallel shaft, planetary, and bevel gearboxes at various speeds.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

ISO 20816-8 Vibration Limits for Reciprocating Compressors

Free online vibration zone evaluation calculator per ISO 20816-8 for reciprocating compressors. Evaluate bearing housing velocity against zone A/B/C/D limits for process gas, air, and refrigeration compressors on rigid and flexible foundations.

By Nikolai Shelkovenko, 1 month ago March 18, 2026

Vibration Limits for Hydro Turbines per ISO 20816-5 | Vibromera

Free online vibration zone evaluation calculator per ISO 20816-5 for hydraulic turbines, pump-turbines, and pumps. Evaluate bearing housing velocity and shaft displacement against zone A/B/C/D limits.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

Vibration Limits — Gas Turbines | ISO 20816-4

Free online vibration zone evaluation calculator per ISO 20816-4 for gas turbines. Evaluate bearing housing velocity and shaft displacement against zone A/B/C/D limits for industrial, aero-derivative, and small gas turbines.

By Nikolai Shelkovenko, 1 month ago February 15, 2026

ISO 20816-3 Vibration Limits — Machines 15kW–50MW | Vibromera

Free online vibration zone evaluation calculator per ISO 20816-3 for industrial machines 15 kW to 50 MW. Evaluate vibration velocity against zone A/B/C/D limits by machine group and support type.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

Vibration Limits for Steam Turbines & Generators | ISO 20816-2

Free online vibration zone evaluation calculator per ISO 20816-2 for steam turbines and generators over 40 MW. Evaluate bearing housing velocity and shaft relative displacement against zone A/B/C/D limits.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

Wind Turbine Vibration Limits per ISO 20816-21 | Vibromera

Free online vibration zone evaluation calculator per ISO 20816-21 for wind turbines. Evaluate bearing housing velocity and acceleration against zone A/B/C/D limits for main bearing, gearbox, generator, and tower top.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

ISO 2954 Vibration Instrument Class Verification | Vibromera

Free ISO 2954 vibration instrument class verification tool. Check if your measurement instrument meets class requirements based on frequency range, accuracy, and filter characteristics.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

Vibration Analysis Glossary | ISO 19499 | 100+ Terms

Interactive searchable glossary of vibration analysis terms. 80+ definitions including acceleration, FFT, BPFI, BPFO, RMS, spectrum, envelope analysis, and more. Based on ISO 19499.

By Nikolai Shelkovenko, 1 month ago February 15, 2026

Vibration Displacement Calculator — Velocity to μm | Vibromera

Convert vibration velocity (mm/s) to displacement (μm) and acceleration (m/s², g) at any frequency. Free online tool with formulas and practical examples.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

Vibration Measurement Plan Generator | Free Online Tool

Free vibration measurement plan generator. Calculate recommended frequency range, measurement points, data storage, and generate downloadable measurement plans for pumps, motors, fans, compressors, and turbines.

By Nikolai Shelkovenko, 1 month ago February 15, 2026

Vibration Acceleration Calculator — mm/s to m/s² & g

Convert vibration velocity (mm/s) to acceleration (m/s², g) at any frequency. Free online tool with ISO 20816 reference, formulas, and practical examples.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

VFD Selection Calculator — Size Your Drive Free | Vibromera

Free online VFD selection calculator. Size a variable frequency drive based on motor power, voltage, and overload requirements. Calculate rated and VFD current.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

V-Belt Selection Calculator | ISO 5288 | Free Online Tool

Free online V-belt selection calculator per ISO 5288. Enter power, speed, and service factor to select belt cross-section (Z, A, B, C, D, SPZ, SPA, SPB, SPC) and calculate number of belts needed.

By Nikolai Shelkovenko, 1 month ago February 15, 2026

Valve Leak Rate Calculator | ISO 5208 Classes A–F

Free online valve leak rate calculator per ISO 5208. Determine maximum permissible leakage for valve seat leakage classes A through F. Evaluate pass/fail for liquid and gas testing.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

Kv/Cv Valve Flow Coefficient Calculator | Vibromera

Free Kv/Cv valve flow coefficient calculator. Bidirectional: calculate Kv from flow+ΔP, flow from Kv+ΔP, or ΔP from Kv+flow. Supports liquid and gas. Cv↔Kv conversion.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

Universal Unit Converter | Force, Moment, Flow & More

Multi-category unit converter: force, moment, flow, viscosity, length, mass, pressure, temperature.

By Nikolai Shelkovenko, 1 month ago February 15, 2026

Ultrasonic Testing Calculator — Beam Path & Near Field | Vibromera

Free ultrasonic testing calculator. Calculate beam path, skip distance, near field length, wavelength. Includes material velocity reference for NDT inspectors.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

Turning Surface Finish Calculator | Ra Formula | Vibromera

Free surface roughness calculator for turning. Ra = f²/(32r). Enter feed per revolution and tool nose radius to calculate theoretical surface finish Ra.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

Turbine Blade Natural Frequency & Campbell Diagram Calculator

Free online turbine blade natural frequency calculator with Campbell diagram check. Calculate first-mode frequency, check harmonic crossings, and identify resonance risks across the operating speed range.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

Torque Converter | Nm ↔ kgf·m ↔ ft·lbf ↔ in·lbf

Convert between Nm, kgf·m, ft·lbf, in·lbf and dNm torque units.

By Nikolai Shelkovenko, 1 month ago February 15, 2026

Torque — Power — Speed Calculator | kW, Nm, RPM

Free online calculator to convert between torque (Nm), power (kW), and rotational speed (RPM). Given any two, calculate the third. Includes hp and ft·lbf conversions.

By Nikolai Shelkovenko, 1 month ago February 15, 2026

Tolerance Stack Analysis Calculator | Free Online Tool

Free online tolerance stack-up analysis calculator. Enter up to 8 dimensions with bilateral tolerances. Calculate worst-case and RSS (statistical) total tolerance.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

ISO 8015 Independence Principle Calculator | Vibromera

Free online ISO 8015 independence principle calculator. Check compliance with envelope requirement. Enter size tolerance, form tolerance, and measured values.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

Tip Speed Calculator | Mulcher, Shredder & Rotor Tool

Free online tip speed calculator for mulchers, shredders, chippers, and hammer mills. Enter rotor diameter and RPM to get tip speed in m/s, ft/min, km/h with comparison to typical operating ranges.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

Timing Belt Calculator | HTD, GT2, GT3 | Free Online Tool

Free online timing belt sizing calculator. Calculate belt length in pitches and number of teeth for HTD 3/5/8/14 and GT2/GT3/GT5 profiles. Enter drive ratio, center distance, and pitch.

By Nikolai Shelkovenko, 1 month ago February 15, 2026

Three Phase Motor Power Calculator | Free Online Tool

Free online three-phase motor power calculator. Compute power P=√3×V×I×cosφ×η, apparent power, reactive power. Bidirectional — solve for any variable.

By Nikolai Shelkovenko, 1 month ago March 3, 2026

Thread Size Converter | Metric ↔ UNC ↔ UNF ↔ BSW | Free

Free online thread size converter. Cross-reference metric (M), UNC, UNF, and BSW thread sizes. Search, filter, and find equivalent thread sizes with pitch, TPI, and stress area data.

By Nikolai Shelkovenko, 1 month ago February 15, 2026

Thermography Temperature Limits per ISO 18434 | Vibromera

Free thermography severity classification tool per ISO 18434. Enter component type and measured ΔT to get severity level, recommended action, and temperature limits.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

Thermal Stress Calculator | σ = E·α·ΔT | Free Online Tool

Free online thermal stress calculator for constrained members. σ = E × α × ΔT. Enter elastic modulus, coefficient of thermal expansion, and temperature change.

By Nikolai Shelkovenko, 1 month ago February 15, 2026

Accelerometer Mounting Resonance Calculator

Calculate accelerometer usable frequency range based on mounting method. Compare stud, adhesive, magnet and probe tip mounting resonance frequencies and their effect on measurement bandwidth.

By admin, 1 month ago February 15, 2026

Thermal Growth Compensation Calculator | Vibromera

Free online thermal growth calculator for shaft alignment. Compute vertical centerline growth due to thermal expansion for motors, pumps, turbines, and gearboxes. Determine cold alignment pre-offset targets.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

Thermal Expansion Calculator — Linear, Volumetric & Stress

Free thermal expansion calculator: linear and volumetric expansion with 20+ materials. Pipe expansion between anchors, expansion loop sizing. Thermal stress σ=EαΔT when constrained.

By Nikolai Shelkovenko, 1 month ago March 5, 2026

Temperature Converter | °C ↔ °F ↔ K ↔ °R | Free Online Tool

Free temperature converter. Convert between Celsius, Fahrenheit, Kelvin, and Rankine instantly. Shows all 4 values simultaneously.

By Nikolai Shelkovenko, 1 month ago February 15, 2026

Calculators

Engineering calculators for vibration analysis and mechanical engineering