Industry-Specific

  • Fraction to MM Conversion Chart Calculator
    Convert any fractional inch to millimeters and decimal inches instantly. Enter a numerator and denominator to get mm, cm and decimal values.
  • Crypto Mining Profitability Calculator
    Estimate GPU crypto mining profit from your hashrate, network hashrate, block reward, coin price, power draw and electricity rate. Daily, monthly and yearly.
  • Cubic Feet Calculator (Volume & Cost for Multiple 3D Shapes)
    Calculate volume in cubic feet for boxes, rooms, tanks, cylinders, spheres and more. Convert to cubic inches, yards, meters, gallons, liters and total cost.
  • Concrete Slab Calculator
    Calculate concrete slab area and volume. Enter length, width, and thickness to get square feet, cubic feet, cubic yards, and bag estimates.
  • IP Subnet & Host Count Calculator
    Calculate usable hosts, subnet mask, wildcard mask and total addresses from any IPv4 CIDR prefix (/0 to /32). Free subnetting tool.
  • Heating & Cooling Load Calculator (Quick Manual J)
    Estimate your home's heating and cooling load in BTU/hr with this quick Manual J-style calculator. Based on US ACCA rule-of-thumb factors.
  • Trucking Cost Per Mile Calculator
    Calculate your trucking cost per mile (CPM) by dividing total fixed and variable costs by miles driven. Free CPM calculator for owner-operators.
  • Solar Panel Payback & ROI Calculator
    Calculate your solar panel payback period and ROI. Enter system cost, annual savings, and lifespan to see break-even years, lifetime savings, and return.
  • Surface Feet per Minute (SFM) Calculator
    Calculate SFM (surface feet per minute) from RPM and tool diameter, or solve for spindle RPM from a target cutting speed. Free machining speed tool.
  • Tap Drill Size Calculator
    Calculate the correct tap drill size for imperial (TPI) or metric (pitch) threads using thread engagement percentage. Fast, accurate machinist tool.
  • CCTV Storage Calculator
    Calculate how much disk space your IP CCTV cameras need. Enter bitrate, recording hours, cameras and retention days to get total GB and TB.
  • Room Lighting Lumens Calculator
    Calculate how many lumens a room needs based on its size and lighting purpose. Enter length, width, and light level to get total lumens and bulb count.
  • Rainwater Harvesting Calculator
    Calculate how many gallons of rainwater you can harvest from your roof based on catchment area, rainfall depth, and runoff coefficient.
  • Wavelength to Frequency Calculator
    Convert wavelength to frequency or frequency to wavelength using λ = c / f. Uses the speed of light by default; supports any wave speed.
  • Pool Chlorine Dosage Calculator
    Calculate how much chlorine to add to your pool to reach a target free chlorine ppm. Enter volume, current and target ppm, and product strength.
  • Lumens to Lux Calculator
    Convert lumens to lux instantly. Enter luminous flux (lm) and the illuminated area in m² to find illuminance (lux = lumens ÷ area).
  • Pool Volume Calculator
    Calculate the volume of a rectangular swimming pool in US gallons from length, width, and depth. Includes liters, surface area, and average depth.
  • Hydraulic Cylinder Force Calculator
    Calculate hydraulic cylinder push and pull force from pressure and bore/rod diameter. Supports bar & mm or psi & inches. F = P × A.
  • Shaft Torque from Power Calculator
    Calculate shaft torque from motor power and RPM. Enter kilowatts or horsepower and speed to get torque in N·m and lb-ft instantly.
  • Solar Panel Number Calculator
    Calculate how many solar panels you need based on daily kWh energy use, panel wattage, peak sun hours, and system efficiency derating.
  • Pulley RPM & Speed Calculator
    Calculate driven pulley RPM from driver pulley diameter, speed, and driven diameter using N2 = N1 × D1 / D2. Find belt drive ratio fast.
  • kVA Calculator
    Calculate apparent power in kVA from voltage and current for single-phase and three-phase circuits. Free, instant kVA calculator with formula.
  • Pipe Flow Velocity Calculator
    Calculate fluid velocity in a pipe from flow rate and inner diameter using v = Q / (π/4 × D²). Free, instant pipe flow speed calculator.
  • Generator Size Calculator
    Calculate the right generator size in watts. Add running watts plus the largest starting surge, with a safety margin, to size your generator correctly.

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