Industrial Calculator — 40+ Free Engineering Tools
Free industrial calculators for cutting speed, flow rate, pressure drop, material weight, motor horsepower, OEE, break-even analysis, safety stock, and more. Formulas, examples, and worked calculations — no signup required.
Loan EMI Calculator
Calculate monthly EMI, total interest, and total repayment for any loan using reducing balance method.
Open calculator →Pipe Volume Calculator
Internal volume of a cylindrical pipe from ID and length.
Open calculator →Tank Capacity Calculator
Volume of a vertical cylindrical tank from diameter and height.
Open calculator →Pump Power Calculator — Motor kW from Flow Rate, Head & Efficiency
Calculate pump hydraulic power and required motor kW from flow rate, total head, fluid density, and pump efficiency.
Open calculator →Flow Rate Calculator — Pipe Flow in m³/h, L/min & GPM (Q = A × v)
Free flow rate calculator: enter pipe diameter and velocity → get volumetric flow in m³/h, L/min, and GPM instantly. Formula: Q = A × v, where A = π(D/2)². Also solves for pipe size from flow rate and velocity. For water, oil, gas, and air. No signup required.
Open calculator →Pipe Pressure Drop Calculator — Friction Loss in bar, Pa & psi (Darcy-Weisbach)
Calculate pipe pressure drop and friction loss for water, oil, and gas using the Darcy-Weisbach equation.
Open calculator →Electrical Load Calculator
Three-phase active power from voltage, current, and power factor.
Open calculator →Pipe Weight Calculator
Steel pipe weight from OD, wall thickness, length, and density.
Open calculator →Motor Power Calculator — HP to kW, Torque to kW & RPM Converter
Calculate electric motor shaft power (kW) from torque and RPM, convert HP to kW, and find torque from power and speed.
Open calculator →Calculate Weight of Material — Steel, Aluminium, Copper & More
Calculate weight of any material from dimensions and density — steel, aluminium, copper, and more.
Open calculator →Load Calculator — Torque, Force & Mechanical Power (N·m, kW)
Industrial load calculator: compute torque from force and radius, and mechanical power from torque and speed.
Open calculator →Cutting Speed Calculator — RPM from Cutting Speed & Diameter (CNC Turning & Milling)
Calculate spindle RPM from cutting speed and diameter, feed rate from chip load, and machining time. For turning, milling, and drilling.
Open calculator →Thermal Expansion Calculator
Calculate linear expansion of materials with temperature change.
Open calculator →Carbon Footprint Calculator
Estimate CO₂ equivalent emissions from energy use, fuel, and travel.
Open calculator →Energy Consumption Tool
Track and project total energy use across multiple equipment items.
Open calculator →Compressed Air Loss Calculator
Calculate energy and cost loss from compressed air leaks.
Open calculator →Solar ROI Calculator
Calculate payback period and returns from a rooftop solar installation.
Open calculator →Fuel Efficiency Calculator
Calculate vehicle or machine fuel efficiency and operating cost per km or per hour.
Open calculator →OEE Calculator — OEE Formula, OEE Calculation & World-Class Benchmark (Free)
Free OEE calculator: enter planned time, downtime, ideal cycle time, total output, and good units — get Availability %, Performance %, Quality %, and OEE % instantly, with a benchmark against world-class 85%. No signup required.
Open calculator →Cycle Time Calculator
Calculate production cycle time, takt time, and throughput rate.
Open calculator →Throughput Calculator
Calculate production throughput rate and identify bottleneck constraints.
Open calculator →Capacity Calculator — Production Capacity Planning & Resource Sizing
Calculate production capacity, identify gaps, and size shifts, machines, and headcount.
Open calculator →Inventory Turnover Calculator
Calculate inventory turnover ratio and days inventory outstanding.
Open calculator →Freight Cost Calculator
Estimate road freight cost from distance, weight, and rate per tonne-km.
Open calculator →Container Loading Tool
Calculate how many units fit in a shipping container by volume and weight.
Open calculator →Warehouse Space Calculator — How Much Warehouse Space Do I Need?
Calculate exactly how much warehouse space you need for your inventory. Enter pallet count, racking levels, and forklift type → get required floor area in m² and space utilisation % instantly.
Open calculator →Lead Time Estimator
Estimate total procurement or production lead time across supply chain stages.
Open calculator →Safety Stock Calculator — Safety Stock Formula, Reorder Point & Service Level
Calculate safety stock and reorder point from demand variability, lead time, and target service level. Formula: Safety Stock = Z × σ_demand × √Lead Time.
Open calculator →Molarity Calculator
Calculate solution molarity, moles, and mass for chemical preparation.
Open calculator →Concrete Volume Calculator
Calculate concrete volume required for slabs, footings, and columns.
Open calculator →Cooling Load Calculator
Estimate HVAC cooling load for an industrial or commercial space.
Open calculator →Cable Size Calculator — kW to mm² for Motors & Industrial Loads (IS 694 / IEC 60364)
Free cable size calculator: enter motor kW (or amps), voltage, cable length, and installation method → get cable size in mm² instantly. Checks both ampacity AND voltage drop per IS 694, IS 732, IEC 60364. Covers 3-phase 415V, single-phase 230V, copper and aluminium. No signup required.
Open calculator →Unit Converter
Convert between units of length, weight, volume, temperature, pressure, and more.
Open calculator →Currency Converter
Convert between major currencies using live or reference exchange rates.
Open calculator →Time Zone Tool
Convert times across global time zones for international project coordination.
Open calculator →Production Cost Per Unit Calculator — Labour, Material & Overhead
Calculate cost per unit from direct labour, raw materials, machine cost, and overheads. Instant result with overhead allocation.
Open calculator →Break-Even Calculator
Find the break-even volume and revenue from fixed costs, variable cost, and selling price.
Open calculator →ROI Calculator
Calculate return on investment, payback period, and net gain.
Open calculator →Energy Cost Calculator
Estimate electricity cost from power consumption, hours, and tariff rate.
Open calculator →Downtime Cost Calculator
Calculate the financial cost of unplanned machine or line downtime.
Open calculator →Margin Calculator
Calculate profit margin, markup, and selling price from cost.
Open calculator →Transformer KVA Calculator — Size a Distribution Transformer from Your Load List
Calculate required transformer KVA from electrical load list, demand factor, and diversity factor.
Open calculator →Diesel Generator Sizing Calculator — Calculate DG Set KVA for Industrial Loads
Calculate required DG set KVA from running load, motor starting kVA, and generator loading factor.
Open calculator →Want the full suite? Browse all tools