pH Acid/Base Index
Evaluate hydrogen ion concentrations and check acidic or alkaline levels using pH logarithmic scales.
Explore Additional Utilities
Essential oil dilution — drops ↔ % in carrier oil
Convert dilution percentages to drop counts and precise weights for facial, body, and therapeutic carrier oils.
Gear ratio ↔ final drive speed — RPM at given speed
Calculate vehicle road speed or engine RPM based on transmission gear ratios, final drive axle ratio, and tire dimensions.
Gelatin & Agar Agar Converter
Convert between gelatin sheets (platinum, gold, silver, bronze), powdered gelatin, and vegan agar agar.
No Claim Discount (NCD)
Track and project No Claim Discount percentages, claim-free year scales, and calculate potential premium savings with claim step-backs.
Recycling Weight & Resource Savings Calculator
Convert quantities of recycled materials (plastic, glass, paper, aluminum) into greenhouse gases, water, and landfill space saved.
Water resistance — ATM ↔ bar ↔ meters depth rating
Convert water pressure tolerances across ATM, Bar, and depth meters. Understand safe real-world water sport activities.
Kite size — wind speed ↔ rider weight
Calculate the recommended kite size in square meters (m²) based on rider weight and wind speed.
Ammonia toxicity — total ammonia ↔ pH ↔ toxic fraction
Calculate the highly toxic un-ionized ammonia (NH3) fraction from Total Ammonia Nitrogen (TAN), pH, and water temperature.
Lye calculator — oil weight ↔ NaOH ↔ KOH amount
Determine exact NaOH and KOH weights required for cold and hot-process soap formulation batches.
Leather weight — oz ↔ mm thickness
Convert leather weights in ounces to exact millimeter or fractional inch thickness. View target usage categories.
Stepper motor steps (degrees ↔ steps ↔ microsteps)
Convert between motor rotation angles in degrees, physical steps, and microsteps based on step angle and microstepping resolution.
Feed conversion ratio — feed weight ↔ fish weight gain
Determine feed efficiency (FCR), specific growth rate, and economic cost per kg of fish biomass gain.
Muzzle velocity — fps ↔ m/s ↔ km/h
Convert velocities between fps, m/s, and km/h. Calculate muzzle kinetic energy in Joules and Foot-Pounds.
Superfat percentage — excess oil ↔ skin conditioning level
Calculate excess unsaponified superfat oils and skin-conditioning moisture metrics.
Cosmic Distance Converter
Convert huge distances across Light Years, Parsecs, Astronomical Units, and Kilometers.
Depth ↔ Geostatic & Hydrostatic Pressure
Determine lithostatic (rock overburden) and hydrostatic (fluid) pressure at custom geological underground depths or deep underwater.
Blood Glucose Converter
Convert blood glucose levels between mmol/L and mg/dL, with diabetic range assessments and HbA1c approximations.
Translation Pages & Pricing Converter
Convert document page count to word and character counts, and calculate translation pricing for multiple languages and target audiences.
Body Surface Area (BSA) Calculator
Calculate body surface area (BSA) for clinical dosing using Mosteller, DuBois, Haycock, and Gehan-George formulas.
One Rep Max (1RM) Calculator
Estimate your single repetition maximum lifting capacity (1RM) using major clinical lifting models (Epley, Brzycki, Lander).