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.
Labour Cost Per Unit Calculator — Direct Cost Formula
Calculate labour cost per unit instantly. Enter your fully-loaded hourly rate and either time per unit or units per hour → get ₹ cost per unit.
Open calculator →Free kW to HP Converter – Instant Results (2026)
Convert kW to HP and HP to kW instantly. Enter any value → get mechanical and metric horsepower with a full conversion table.
Open calculator →Loan EMI Calculator — Equipment & Machinery Financing
Calculate monthly EMI, total interest, and total repayment for machinery loans, equipment financing, and project capital loans using the reducing balance method used by Indian banks and NBFCs.
Open calculator →Pipe Volume Calculator
Internal volume of a cylindrical pipe from ID and length.
Open calculator →Free Tank Capacity Calculator – Instant Results (2026)
Volume of a vertical cylindrical tank from diameter and height.
Open calculator →Pump Power Calculator — Motor kW from Flow & Head
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
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 (bar/psi)
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 →Free Pipe Weight Calculator – Instant Results (2026)
Steel pipe weight from OD, wall thickness, length, and density.
Open calculator →Motor Power Calculator — HP to kW & Torque to kW
Calculate electric motor shaft power (kW) from torque and RPM, convert HP to kW, and find torque from power and speed.
Open calculator →Free Material Weight Calculator – Instant Results (2026)
Calculate weight of any material from dimensions and density — steel, aluminium, copper, and more.
Open calculator →Load Torque Calculator — Torque, Force & Power
Industrial load calculator: compute torque from force and radius, and mechanical power from torque and speed.
Open calculator →Cutting Speed Calculator — RPM from Diameter (CNC)
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 →Free OEE Calculator – Instant Results (2026)
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 Planning Calculator — Resource Sizing Tool
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 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 — 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 (IS 694)
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 — Length, Weight, Volume & Pressure
Convert between units of length, weight, volume, temperature, pressure, and more.
Open calculator →Currency Converter — INR, USD, EUR for Import Costs
Convert between major currencies using live or reference exchange rates.
Open calculator →Time Zone Tool — Times for International Vendor Calls
Convert times across global time zones for international project coordination.
Open calculator →Production Cost Per Unit Calculator (Free)
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 →Free Energy Cost Calculator – Instant Results (2026)
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 From Your Load List
Calculate required transformer KVA from electrical load list, demand factor, and diversity factor.
Open calculator →Diesel Generator Sizing Calculator — DG Set KVA
Calculate required DG set KVA from running load, motor starting kVA, and generator loading factor.
Open calculator →GST Calculator — CGST, SGST & IGST for B2B Invoices
Calculate GST instantly — add or extract GST from any amount, with automatic CGST+SGST/IGST split for intrastate and interstate B2B invoices.
Open calculator →CNC Machining Cost Calculator — Per-Part Cost Estimate
Estimate CNC machining cost per part from material, machine rate, cycle time, setup time, and batch quantity — get per-part and total batch cost instantly.
Open calculator →Welding Cost Calculator — Electrode, Labour & Power
Estimate total welding cost from filler/electrode consumption, arc-on time, labour rate, machine power draw, and shielding gas — get an instant cost breakup.
Open calculator →