Land Area & Acres Metric Calibrator
Evaluate acreage, hectares, square meters, and square feet calculations.
Explore Additional Utilities
Pattern scaling — original size ↔ scaled dimensions
Scale sewing and cutting patterns up or down uniformly. Convert dimensions between source and target sizes.
Exposure Value (EV) & Lux Converter
Convert between EV and various shutter speed, aperture, and ISO combinations, with equivalent scene lux and EV100 references.
Numerical aperture ↔ acceptance angle — fiber coupling
Determine light coupling capabilities, supported modes, V-numbers, and acceptance cone widths for optical optical fibers.
R-value ↔ U-value — insulation thermal resistance
Convert between R-value thermal resistance and U-value heat transmittance with preset materials lookup.
Concrete strength — MPa ↔ psi ↔ N/mm²
Convert concrete compressive strength between MPa, psi, and N/mm². View typical application guidelines and concrete classes.
Tire size decoder — 205/55R16 ↔ diameter ↔ width ↔ aspect
Decode metric tire specs to calculate sidewall height, total diameter, circumference, and compare speedometer error against a secondary size.
Clothing Size Converter
Convert apparel sizes (XS to 3XL) across US, UK, European, and Asian standards.
Shrink Wrap Roll Coverage
Determine how many pallets can be wrapped with a single shrink wrap roll based on roll dimensions, gauge, and layers.
Unix Epoch Converter
Convert Unix epochs (seconds/milliseconds) to human-eye standard DateTimes, and transform local dates to Epoch times.
Essential oil dilution — drops ↔ % in carrier oil
Convert dilution percentages to drop counts and precise weights for facial, body, and therapeutic carrier oils.
Bandwidth ↔ throughput — theoretical vs real world
Compare absolute Shannon-Hartley channel capacity limits against expected TCP throughput using packet loss and round-trip times.
Handicap index ↔ course handicap — golf scoring
Translate USGA/R&A Handicap Index to Course Handicap with slope rating and course rating adjustments.
Salinity — PSU ↔ g/kg ↔ % — seawater concentration
Convert between Practical Salinity Units (PSU), salinity concentration in g/kg (ppt ‰), and percentage (%).
Screw gauge ↔ mm diameter — imperial vs metric screws
Cross-reference standard wood screw gauges with thread diameter in millimeters and inches for pre-drilling and pilot holes.
Julian ↔ Gregorian Calendar
Convert between Julian Dates (JD, MJD) and standard Gregorian calendar dates with day of the year and century metrics.
URL Encoder & Decoder
Safely encode illegal URL string sequences or decode clean string paths.
Subtitle Timing & Readability
Evaluate subtitle card readability by computing characters per second (CPS), words per minute (WPM), and duration constraints.
Bohr radius ↔ nanometers — atomic scale reference
Determine electron orbital radius and binding energy levels for Hydrogen-like atomic configurations.
Paper Size Comparer
Convert standard paper formats (A4, Letter, Legal, A3) in mm/inches and visually compare overlap.
Hebrew ↔ Gregorian Calendar
Convert between the Hebrew lunisolar calendar and standard Gregorian dates, detailing standard Jewish months, holidays, and leap years.