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
Paper Size Comparer
Convert standard paper formats (A4, Letter, Legal, A3) in mm/inches and visually compare overlap.
Flash Guide Number Calculator
Solve the photography flash equation to find guide numbers, aperture, subject distance, or ISO speed for perfect manual flash exposures.
BPM ↔ Milliseconds Calibrator
Convert beats per minute (BPM) to millisecond delay values and frequency hertz.
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.
Weld throat thickness ↔ leg length — fillet weld geometry
Convert between throat thickness and leg length for fillet welds. Estimate joint volume, weld weight, and shear load capacity.
Base64 Encoder
Encode textual strings to Base64 format, or decode Base64 back to raw text.
Battery capacity — Ah ↔ Wh ↔ days of autonomy
Convert between Amp-hours (Ah) and Watt-hours (Wh) and calculate battery bank backup days of autonomy based on loads.
Bit size — horse mouth width ↔ mm/inch measurement
Convert horse mouth width measurement to proper bit sizing in inches, centimeters, and millimeters with clearance safety margins.
Water hardness — ppm ↔ grains per gallon ↔ mg/L
Convert brewing water hardness profiles between ppm, mg/L, Grains per Gallon (gpg), and German degrees (dGH).
Generator sizing — equipment load ↔ kVA needed
Estimate generator apparent power capacity requirements by summing dynamic equipment active and reactive loads.
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.
Clothing Size Converter
Convert apparel sizes (XS to 3XL) across US, UK, European, and Asian standards.
De Broglie wavelength — particle mass + velocity → wavelength
Calculate quantum mechanical wavelengths for matter waves under both classical and relativistic velocities.
Mechanical Power (W ↔ hp)
Convert physical engine horsepower ratings, mechanical draft forces, and electric wattages.
Explosive charge weight — rock volume ↔ kg of explosive
Estimate required explosives (kg, lbs) for blasting a rock volume using powder factor models for open-pit mining.
Data Storage Units
Convert digital storage capacity sizes across bits, Bytes, MB, GB, and Terabytes.
Weight Converter
Convert between kilogram, gram, pound, ounce, stone, and other mass units.
Color Code Converter
Instantly convert between HEX, RGB, HSL, and CMYK color spaces with a visual real-time preview and slider inputs.
Displacement tonnage ↔ cubic meters — ship buoyancy
Convert ship displacement tonnage to submerged volume (m³) and buoyancy force. Choose between freshwater and saltwater standards.
Atomic mass units ↔ grams — mole calculations
Convert Atomic Mass Units (u / Da) to grams or kilograms, and compute molar quantities of chemical elements.