Ore Grade & Concentration Converter
Convert concentrations of valuable minerals across g/t, weight percentage (%), oz/ton, and ppm, plus compute total metal yield and recovery values.
Explore Additional Utilities
Dog Age ↔ Human Age Equivalent
Calculate the human age equivalent of a dog based on their age and breed size category (small, medium, large, or giant), using modern veterinary curves.
Barometric Altimeter Settings
Calibrate pressure settings between QNH and QFE based on airfield elevation and temperature.
Duration Converter
Convert time intervals seamlessly between weeks, days, hours, minutes, and seconds.
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.
Cooling & HVAC Power (BTU/h ↔ W)
Compare heating, cooling, and air conditioning power capacities with corresponding watt ratings.
Hijri ↔ Gregorian Calendar
Convert between Islamic Hijri calendar and standard Gregorian dates, with customized crescent visibility observation adjustments.
Numerical aperture ↔ acceptance angle — fiber coupling
Determine light coupling capabilities, supported modes, V-numbers, and acceptance cone widths for optical optical fibers.
No Claim Discount (NCD)
Track and project No Claim Discount percentages, claim-free year scales, and calculate potential premium savings with claim step-backs.
Period Tracker & Predictor
Track menstrual cycles, predict future period start dates, cycle phases, and typical symptom occurrences.
Radioactive Decay Half-Life
Estimate remaining isotope amounts and decay timelines from standard half-life periods.
URL Encoder & Decoder
Safely encode illegal URL string sequences or decode clean string paths.
Roman Numeral Converter
Convert between classical Roman numerals (XIV, MCMLXX) and decimal integers dynamically.
Time Zone Converter
Compare and convert times between universal time zones with ease.
Nautical Distance & Speed Sizer
Convert distances between nautical miles, statute miles, and kilometers, and calculate knot-based speeds.
Flesch-Kincaid Reading Level
Calculate readability scores and Flesch-Kincaid school grade levels for any input text in real-time.
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).
Reproductive Health Tracking Suite
Track menstrual cycles, predict ovulation day, fertile windows, and estimate pregnancy due dates & milestones.
Dewpoint & Relative Humidity Calculator
Calculate dewpoint, relative humidity, or air temperature using the Magnus-Tetens formula.
Bullet drop — distance ↔ inches ↔ cm at given range
Estimate bullet drop trajectories over distance based on muzzle velocity, projectile mass, and gravitational pull.
Draw weight — lbs ↔ kg — bow poundage
Convert between Pounds (lbs) and Kilograms (kg) draw weights. View recommended setups for various target types.