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
Fold ratio — paper thickness ↔ maximum folds possible
Compute theoretical limit of fold iterations possible for paper size and thickness (Britney Gallivan equation).
Dog Age ↔ Human Age Equivalent
Calculate the human age equivalent of a dog based on their age and breed size category (small, medium, large, or giant), using modern veterinary curves.
IPv4 ↔ decimal ↔ binary — IP address formats
Translate standard dot-decimal IPv4 addresses to raw decimal integers and 32-bit binary representations.
Torque Converter
Convert rotating force indicators between Newton-meters (Nm), pound-feet (lb-ft), and kgf·m.
Stellar Magnitude Converter
Calculate apparent vs. absolute magnitudes of stars and estimate their physical distance.
Atomic mass units ↔ grams — mole calculations
Convert Atomic Mass Units (u / Da) to grams or kilograms, and compute molar quantities of chemical elements.
Pixel resolution — ground sample distance ↔ map scale
Calculate Ground Sample Distance (GSD), raster pixel resolutions, and minimum map scales for digital cartography and aerial imagery.
Length Converter
Convert between meter, kilometer, centimeter, mile, yard, foot, inch, and more.
Infill density (% ↔ structural strength)
Estimate mechanical tensile strength and relative part weight based on infill percentage, material choice, and shell count.
Visual Acuity Converter
Convert visual acuity measurements between Snellen US (20/20), Snellen Metric (6/6), decimal, LogMAR, and Percentage systems.
Swimming Pace & Yardage Converter
Convert swim splits and paces between per-100m, per-100 yards, and overall distances with custom pool sizes.
Electron volts ↔ joules ↔ nanometers — photon energy
Convert between photon energy (eV, Joules) and physical wavelengths (nm, pm) or frequency (THz).
Clinical Blood Pressure Gauges
Compare clinical medical blood pressure or vacuum values between mmHg and kPa units.
Soil Plasticity Index Calculator
Calculate Plasticity Index (PI) from Liquid Limit (LL) and Plastic Limit (PL), and interpret soil state using the Atterberg limits chart.
Scale factor (model size ↔ real world)
Convert dimensions between model design sizes and physical real-world scale targets, including imperial/metric conversions.
Morse Code Translator
Translate standard text to Morse code signals (dots and dashes) and decode them in real-time.
Pump Efficiency Calculator
Calculate pump efficiency and hydraulic power based on volumetric flow rate, head height, fluid density, and input shaft power.
Heel angle ↔ righting moment
Calculate heel angle, righting arm (GZ), righting moment, and sailboat stability from displacement, vertical center of gravity, and wind force.
Soil Bearing Capacity Converter
Convert soil bearing capacities between Kilopascals (kPa), Tons per Square Foot (tsf), Pounds per Square Foot (psf), and kg/cm² with typical soil range guides.
Cooling load — room size ↔ BTU ↔ tons of refrigeration
Calculate room-by-room air conditioner cooling load requirements in BTU, tons, and kilowatts based on area, insulation, and occupants.