Plumbing & Pipework Calculations
Industrial and residential grade reference calculators for sizing, flow velocity, surge hydraulics, threading cross-references, hot water load ratings, and drainage pitch offsets.
Pipe Size & OD
NPS vs DN standard dimensions lookup. Cross-reference nominal pipe size, schedule, actual outer diameter, wall thickness, and internal diameter.
Sizing Inputs
For Nominal Pipe Sizes (NPS) **12 inches and smaller**, the nominal size does NOT match the physical outer diameter. For example, a **2" NPS** pipe has an actual outer diameter of **2.375" (60.33mm)**. The actual inside diameter changes based on the Schedule (wall thickness).
Visual Pipe Cross Section
Precise Dimension Specs
General Plumbing & Pipework Reference Guidelines
Ensure calculations correspond to relevant ASTM, ISO, or ASHRAE standards. Always cross-verify fluid speed ratings, pipe threads, and drain grade requirements with local municipal building and plumbing codes before active installation.
Explore Additional Utilities
Void Fill Material Volume
Calculate empty space volume inside a shipping box after placing items to determine packaging material needed.
Tsunami wave speed — ocean depth ↔ km/h
Predict shallow water tsunami wave propagation speed from ocean depth parameters.
BPM ↔ Milliseconds Calibrator
Convert beats per minute (BPM) to millisecond delay values and frequency hertz.
Yeast pitch rate — batch volume + gravity → grams of yeast
Determine required yeast cell counts and dry yeast weight based on batch volume, wort gravity, and target pitch rates.
Fabric & Thread Density Calibrator
Analyze fabric weights, compare cotton single-ply thread counts, and calculate textile density.
GSM ↔ oz per sq yard — fabric weight
Convert fabric weight between Grams per Square Meter (GSM) and ounces per square yard.
Thermohaline density — temperature + salinity → seawater density
Determine seawater density and specific volume from water temperature and salinity using the UNESCO International Equation of State.
Board feet ↔ cubic meters ↔ cubic feet — lumber volume
Convert lumber volume measurements between Board Feet, Cubic Feet, and Cubic Meters.
Engine power ↔ hull speed — planing vs displacement
Estimate maximum displacement hull speeds (LWL formula) or calculate planing hull speeds using Crouch's classic marine formula.
Musical Note ↔ Frequency
Translate standard musical notes and octaves to precise audio hertz frequencies.
Dye concentration — owf % ↔ grams per liter
Convert textile dyestuff concentration between on weight of fiber (% owf) and grams per liter (g/L).
Inverter sizing — load watts ↔ VA rating needed
Analyze total AC continuous and surge loads to specify the ideal inverter Volt-Amp (VA) and wattage ratings.
Heat flux — watts per square meter ↔ BTU/hr·ft²
Convert heat transfer rates per unit area between W/m², kW/m², BTU/hr·ft², and cal/s·cm².
Carbon Footprint Calculator
Convert between distance driven (km or miles) and greenhouse gas emissions (kg CO2) across various vehicle fuel types and efficiencies.
Propeller pitch ↔ boat speed — theoretical boat speed
Calculate theoretical boat speed and actual speed based on propeller pitch, engine RPM, gear ratio, and hull slip percentages.
Knitting Gauge Converter
Convert knitting and crochet stitches and rows count between centimeters and inches.
Translation Pages & Pricing Converter
Convert document page count to word and character counts, and calculate translation pricing for multiple languages and target audiences.
Pump Efficiency Calculator
Calculate pump efficiency and hydraulic power based on volumetric flow rate, head height, fluid density, and input shaft power.
Steel grade equivalents — ASTM ↔ EN ↔ JIS standards
Cross-reference standard steel grades across ASTM/AISI, EN/DIN, and JIS systems. Includes chemical composition and key mechanical limits.
Oxygen Saturation & PaO2 Converter
Convert blood oxygen saturation (SpO2) to partial pressure of oxygen (PaO2) using the clinical Severinghaus-Ellis model.