HVAC & Thermal Calculations
Standard sizing utilities for ventilation blower capacity, thermal wall insulation R-values, residential cooling loads, dew point safety audits, and factory refrigerant split-system lines.
Cooling Load (BTU)
Calculate room-by-room cooling requirements in BTU, kilowatts, and Tons of Refrigeration based on area, insulation, sun exposure, and occupancy.
Physical Room Inputs
Conversion & Calculationsaccurate results
Air Conditioner Sizing Recommendation
Recommended AC Unit Size: 6812 BTU/hr (approx. 0.5 Tons).
Insulation factor used: average. Sun factor: normal. Calculated additional chemical heat load includes 2 occupants and 150 Watts of running appliances.
Explore Additional Utilities
Angular Scales & Rotations
Convert degrees, radians, and gradians for geometric or angular rotations.
Reserve deployment altitude — height ↔ opening time
Evaluate deployment altitude, reserve opening time, and descend safety duration.
Soil pH & Amendment Calculator
Calculate the required lime or sulfur applications needed to correct soil acidity/alkalinity for plant growth.
Text Case Converter
Swiftly switch text between UPPERCASE, lowercase, camelCase, snake_case, or Title Case.
Handicap index ↔ course handicap — golf scoring
Translate USGA/R&A Handicap Index to Course Handicap with slope rating and course rating adjustments.
Frequency ↔ wavelength — antenna length calculation
Determine electromagnetic wavelength from frequency and velocity factors. Get recommended quarter-wave and half-wave antenna lengths.
Thermohaline density — temperature + salinity → seawater density
Determine seawater density and specific volume from water temperature and salinity using the UNESCO International Equation of State.
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.
Sample size calculator — confidence level ↔ margin of error
Determine required sample sizes for research surveys or experiments based on population size, confidence levels, and target margin of error.
Planck units ↔ SI units — fundamental physics constants
Translate between SI physical units and the fundamental Planck natural units based on universal constants.
IQ score ↔ percentile rank
Map IQ scores (with standard deviations 15 or 16) to cognitive percentile ranks, rarity indices, and standard intelligence brackets.
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).
Radioactive Decay Half-Life
Estimate remaining isotope amounts and decay timelines from standard half-life periods.
Chisel bevel angle — degrees ↔ sharpening guide setting
Calculate chisel bevel angles and determine the exact projection distance needed for hone sharpening guides.
Premium Rate ↔ Sum Insured
Calculate basic insurance premium rates, loading factors, and sum insured relationships (percentage, permille, and absolute values).
Kiln temperature — cone number ↔ degrees Celsius
Map pyrometric Orton cones to exact kiln temperature equivalents at fast or slow heating rates.
Preservative usage rate — product weight ↔ grams needed
Determine exact weight additions of cosmetic-grade preservatives in grams based on batch specifications.
Board feet ↔ cubic meters ↔ cubic feet — lumber volume
Convert lumber volume measurements between Board Feet, Cubic Feet, and Cubic Meters.
Hardness converter — Rockwell ↔ Brinell ↔ Vickers
Convert between Rockwell C, Rockwell B, Brinell, and Vickers scales with approximate tensile strengths for steel materials.
Drilling rate — ROP in m/hr ↔ ft/hr
Translate Rate of Penetration (ROP) and calculate specific drilling time, drilling speed efficiency, and shift performance.