Marine Engineering & Buoyancy Calculators
Verify ship displacement tonnages, estimate theoretical boat speeds and propeller slip, evaluate hull speeds (planing vs displacement), calculate fuel burn rates, and determine line breaking strengths.
Propeller Pitch & Slip
Calculate theoretical boat speed and actual speed based on propeller pitch, engine RPM, gear ratio, and hull slip percentages.
Propulsion Parameters
Engineering Report
Real-time CalculationsQuick Formulas Summary
Explore Additional Utilities
Saddle fit — tree width ↔ horse back angle & measurement
Determine tree width (Narrow, Medium, Wide, Extra Wide) from wither angle measurements and back curvature.
Envelope size — letter size ↔ envelope dimensions needed
Match standard paper formats and fold styles to commercial envelope dimensions with proper clearance parameters.
Paint Coverage Calculator
Estimate the gallons or liters of paint needed based on area and number of coats.
pH adjustment — acid/alkali drops ↔ pH change estimate
Estimate acidifying or alkalizing solution amounts to safely adjust formulation pH values.
Water Depth & Pressure Converter
Convert ocean depth between fathoms, meters, and feet, and estimate hydrostatic pressure and bathymetric marine zones.
Marine Fuel Consumption Estimator
Estimate marine engine fuel consumption in liters per hour at given RPM values using theoretical propeller law curves.
Flight Visibility & RVR Converter
Compare meteorological visibility and runway visual range (RVR) across nautical, statute, and metric scales.
Voltage Divider Designer
Calculate output voltage, resistor ratios, and locate standard E24 resistor values for divider networks.
Musical Note ↔ Frequency
Translate standard musical notes and octaves to precise audio hertz frequencies.
Paper weight — gsm ↔ lb bond ↔ lb cover ↔ lb text
Convert paper weights between Grams per Square Meter (GSM) and standard US basis weights (Bond, Text/Book, Cover).
Hash output size — MD5 ↔ SHA1 ↔ SHA256 ↔ SHA512 bits
Analyze hash function characteristics (MD5, SHA-1, SHA-2, SHA-3), including bit size, hex length, collision vulnerability, and use cases.
Lux & Foot-Candles Photometry
Calculate architectural light levels, illuminance indexes, and foot-candle units.
Shoe Size Converter
Convert footwear sizes across US, UK, Europe, and Japanese standards for men and women.
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.
Period Tracker & Predictor
Track menstrual cycles, predict future period start dates, cycle phases, and typical symptom occurrences.
Weight-Based Medication Dosing
Calculate safe weight-based medicine dosages, volume outputs, and administration frequency.
Barometric Altimeter Settings
Calibrate pressure settings between QNH and QFE based on airfield elevation and temperature.
Ink coverage — % coverage ↔ grams per sq meter
Estimate wet/dry printing ink consumption and layer weight based on sheet area and CMYK channel coverage percentages.
Lactate threshold — heart rate % ↔ training zone
Convert heart rate threshold percentages into targeted cardiovascular athletic training zones.
Alcohol by Volume & Proof Converter
Convert between alcohol by volume (ABV), proof, and standard alcohol units for drinks and home brewing.