Tools
Practical calculators and utilities for engineering teams
25 tools found
Generator Load Estimator
Generator & Site Settings
Set generator duty, derating and starting capability globally. Organize loads into panels (switchgear, MCC, distribution, lighting) with their own voltage and diversity; site diversity reduces the sum of panel peaks to the generator peak.
Import format: use the Template button to download a sample file. Expected columns: Panel, Name / TAG, Load type, Qty, Power, Unit, Power factor, Demand %, Starting method, Voltage (V), Observations. Load types: Motors / HVAC (with Starting) — Lighting, Resistive, Welder, UPS, Control Panel, Capacitor Bank, Spare, Other. Units: kW, HP, kVA. Starting: DOL, Star-Delta, Soft Starter, VFD, Auto-Transformer, n/a. Headers in Spanish or English are auto-detected. After import you can map any unmatched columns and fix rows in the preview before confirming.
Loads in Main Switchgear (2)
| Name | Type | Qty | Size | Unit | PF | Demand% | Eff | Starting | Voltage | Run kW | Run kVA | Observations | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 13.26 | 15.60 | ||||||||||||
| 3.50 | 4.12 |
Loads in Lighting Panel (1)
| Name | Type | Qty | Size | Unit | PF | Demand% | Eff | Starting | Voltage | Run kW | Run kVA | Observations | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n/a | n/a | 5.00 | 5.56 |
Recommended Generator
80 kVA · 64 kW
Standby duty (85% load factor) · Est. full-load 96 A @ 480 V
26.6
kW
30.9
kVA
21.8
kW (× site div.)
25.3
kVA (× site div.)
122.7
kVA
73.6
kVA incl. margin/derating
23%
32%
of recommended
Panel Summary
| Panel | Type | Voltage | Diversity | Run kW | Run kVA | Peak kVA | Feeder A |
|---|---|---|---|---|---|---|---|
| Main Switchgear | Switchgear | 480 V | 1 | 16.8 | 19.7 | 117.2 | 24 |
| Lighting Panel | Lighting | 208 V | 1 | 5 | 5.6 | 5.6 | 15 |
| Sum of panels (before site diversity 1) | 21.8 | 25.3 | 122.7 | ||||
| Site total (× site diversity) | 21.8 | 25.3 | 122.7 | 96 @ bus | |||
Engine power req.
30.7 kW
Largest motor start adder
97.5 kVA
Peak load vs recommended
153%
Preliminary generator sizing using the demand-factor method with motor starting inrush by starting method (DOL 6×, Star-Delta 2.5×, Soft Starter 2.5×, VFD 1.4×). Loads are aggregated per panel (each with its own voltage and diversity factor), then summed with a site diversity factor. Each panel's largest motor is assumed to start last; site peak assumes only one motor starts at a time. Not a certified genset selection per NECA/ISO 8528 — verify with the manufacturer's sizing software.
Instrumentation
4–20 mA Scaling Calculator
Convert engineering units to/from 4–20 mA signal values. Useful for PLC/DCS scaling configuration.
Instrumentation
I/O Card Selector
Enter I/O point counts by signal type (DI, DO, AI, AO, RTD, TC) and get the quantity and model of I/O cards to specify. Covers PLC platforms (Allen-Bradley, Siemens, Schneider M580 & TriconCX) and DCS platforms (Emerson DeltaV, Honeywell Experion, Yokogawa CENTUM, ABB AC 800M) with spare capacity.
Instrumentation
Junction Box Capacity Estimator
Estimate terminal block count, DIN rail utilization, and cable gland schedule for junction box sizing.
Instrumentation
RTD / Thermocouple Quick Reference
Temperature vs resistance/millivolt lookup for PT100, PT1000, Ni100 and thermocouple types J, K, T, E, N, R, S, B. Includes sensor comparison table.
Instrumentation
Instrument Cable Voltage Drop
Calculate voltage drop for instrument signal cables over distance.
Electrical
Voltage Drop Calculator
Calculate voltage drop for power cables based on load, cable size, and distance.
Electrical
Motor FLA Estimator
Estimate full load amps for AC motors based on HP/kW and voltage.
Electrical
Generator Load Estimator
Estimate generator sizing from a connected load list with demand factors and motor starting inrush (DOL, Star-Delta, Soft Starter, VFD). Standby/Prime/Continuous duty, altitude derating, planning margin, voltage-dip check, CSV & printable report.
Process
Restriction Orifice Sizing
Preliminary restriction orifice (RO) sizing for gas and single-phase liquid services using differential-pressure & compressible-flow equations. Critical/subcritical detection via critical pressure ratio, multi-stage equal-ratio distribution, cavitation/flashing screening. Steam and two-phase flashing are not certified methods here. SI & US Customary.
Process
Orifice Plate Sizing Calculator
Preliminary orifice plate sizing for natural gas using a Reader-Harris/Gallagher discharge-coefficient form (ISO 5167-2 equation structure) with flange taps. Solve for flow rate or bore diameter. Includes an optional gas chromatography module for Z-factor (Hall-Yarborough) and SG from composition. Not a certified ISO 5167 / AGA-3 / API MPMS 14.3 custody-transfer calculation.
Instrumentation
Control Valve Cv Calculator
Calculate required valve flow coefficient (Cv) for liquid and gas services using ISA/IEC 60534-2-1 equations.
Instrumentation
Control Valve Sizing Calculator
Preliminary control-valve sizing for liquid, gas and steam per IEC 60534-2-1 / ISA-75.01.01. Required Cv/Kv, recommended nominal size, choked/cavitation/flashing checks, multi-case (min/normal/max), lead & printable report. Preliminary — not for final procurement or safety-critical design.
Process
Pipe Sizing Tool
Verifies line hydraulics (liquid/gas/multiphase): velocity, frictional ΔP/L and API 14E erosion via Darcy–Weisbach/Colebrook and Beggs & Brill. Editable acceptance criteria and batch line sizing, with auto-size and exports. Preliminary — not a certified calculation.
Process
Pressure Unit Converter
Convert between PSI, bar, kPa, MPa, kg/cm², and inH₂O.
Process
Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin, and Rankine.
Process
Gas Flow Unit Converter
Convert gas flow rates between SCFM, SCFH, MMSCFD, Nm³/h, and other units.
Process
Flare Radiation Calculation
Preliminary flare thermal-radiation calculation per API 521 (simple point-source method): heat release, flame length, wind-relative flame geometry, atmospheric transmissivity, optional solar baseline, exclusion radii, receiver flux, and required stack height. Not a substitute for Brzustowski-Sommer, solid-flame, or CFD siting.
Process
Separator Preliminary Sizing
Preliminary screening of horizontal/vertical two-phase and three-phase oil & gas separators (Souders–Brown gas capacity + liquid retention holdup). ID, L/H, L/D, gas velocity vs allowable, retention checks, bilingual, unit systems, traceable calculation details. Screening only — not certified API 12J / GPSA or mechanical design.
Commissioning
HART Loop Resistance Checker
Verify HART loop resistance compliance and transmitter voltage on a 4–20 mA HART analogue loop before commissioning. Checks total loop resistance ≥ HART modem minimum (typ. 250 Ω) and supply voltage at the device.
Electrical
kW / HP / Amp Conversion
Convert between kilowatts, horsepower, and amperes for motors and loads. Bidirectional power↔current with motor context (voltage, phases, power factor, efficiency).
Process
Pressure Safety Valve (PSV) Sizing
Preliminary PSV sizing per API RP 520 Part I for gas/vapor, liquid and steam services. Multi-case relief scenarios, API 526 orifice selection (D-T), choked-flow detection and oversize-margin check. Lead-gated PDF datasheet for procurement. Preliminary — not for final procurement or safety-critical design.
Electrical
Power Factor Calculator
Calculate apparent, real, and reactive power from power factor and kVA.
Commissioning
Commissioning Punch List
Printable punch list template for pre-commissioning and commissioning activities.
Commissioning
FAT Checklist Generator
Factory Acceptance Test checklist based on system type.
Commissioning
SAT Checklist
Site Acceptance Test checklist for instrumentation and control systems.