Roof Pitch Calculator
Convert between roof pitch ratios, degrees, and percentages, and calculate rafter lengths.
Slope Parameters
Pitch 2:12 to 4:12. Lower limit for standard asphalt shingles.
Graphical Pitch Representation
Explore Additional Utilities
Horse Height (Hands ↔ cm ↔ inches)
Convert equestrian height from traditional hands (hh, where 1 hand = 4 inches) to centimeters and inches, with pony/horse classification.
Render thickness ↔ coverage per bag
Determine dry render mix weight and bag counts for a target wall area and application thickness. Assess single bag yields.
Water Footprint & Virtual Water Calculator
Estimate virtual water consumption based on diet choices, household activities, and direct/indirect product footprints.
Supersonic Mach Speed
Assess sonic speed boundaries and atmospheric Mach velocities relative to local dry conditions.
Clothing Size Converter
Convert apparel sizes (XS to 3XL) across US, UK, European, and Asian standards.
Lye calculator — oil weight ↔ NaOH ↔ KOH amount
Determine exact NaOH and KOH weights required for cold and hot-process soap formulation batches.
Dissolved oxygen — mg/L ↔ % saturation at temperature
Convert between DO mg/L and % saturation. Analyze solubility boundaries based on water temperature and salinity.
Knitting Gauge Converter
Convert knitting and crochet stitches and rows count between centimeters and inches.
Colony weight gain — nectar flow ↔ kg per day estimate
Estimate the daily hive weight gain from raw floral nectar inflow and final cured honey production.
Karat purity (Karat ↔ Fineness ↔ % gold)
Convert gold purity levels between Karat values, parts-per-thousand millesimal fineness, and pure gold percentage.
Pipe Flow Rate Calculator
Calculate water flow rate, velocity, and capacity under gravity or pressurized nozzle flow.
Electrode size ↔ amperage range — stick welding
Match stick electrode sizes (3/32", 1/8", 5/32") and classes (E7018, E6010, E6013) with optimal welding amperage ranges.
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.
Foreign Exchange Cross Rates
Compare conversion values and custom exchange indicators across popular global currencies.
Torque Converter
Convert rotating force indicators between Newton-meters (Nm), pound-feet (lb-ft), and kgf·m.
GPS Format Converter
Convert global latitude and longitude between Decimal Degrees (DD) and Degrees Minutes Seconds (DMS).
Dewpoint & Relative Humidity Calculator
Calculate dewpoint, relative humidity, or air temperature using the Magnus-Tetens formula.
Electricity Billing (kWh ↔ MJ)
Analyze electric billing kilowatt-hours and physical energy auditing megajoule metrics.
IQ score ↔ percentile rank
Map IQ scores (with standard deviations 15 or 16) to cognitive percentile ranks, rarity indices, and standard intelligence brackets.
Lumens & Bulb Wattage Equivalence
Compare light outputs in lumens with electrical consumption in bulb watts.