GCF and LCM Calculator – Find Greatest Common Factor and Least Common Multiple
Free GCF and LCM calculator with step-by-step worked examples, prime factorization method, and a quick reference table.
Math Calculators
Fractions, quadratic, percentage calculators
Serial Dilution Calculator – Concentration at Every Dilution Step
Free Serial Dilution Calculator for lab and microbiology use – enter starting concentration, dilution factor and number of steps to get a full dilution series table.
Brix to ABV Calculator – Estimate Wine and Cider Alcohol Content
Free Brix to ABV Calculator for winemakers and cider makers – enter starting and final Brix readings to estimate alcohol by volume instantly.
Strike Water Calculator – Mash Temperature for Homebrewing
Free Strike Water Calculator for homebrewing – enter grain weight, water-to-grain ratio, grain temperature and target mash temp to find your exact strike water temperature.
IBU Calculator – Beer Bitterness (Tinseth Formula) for Homebrewers
Free IBU Calculator using the Tinseth formula – enter hop weight, alpha acid percent, boil time and batch size to estimate beer bitterness instantly.
Priming Sugar Calculator – Beer Bottle Carbonation (Corn Sugar, DME, Honey)
Free Priming Sugar Calculator for homebrew bottle carbonation – enter batch size, temperature and target CO2 volumes to get corn sugar, table sugar, DME and honey amounts.
Density of Solution Calculator – Mass, Volume and Concentration
Free Density of Solution Calculator. Find density from mass and volume, or convert between density and weight/volume concentration. Includes formula and reference table.
pH Buffer Calculator – Henderson-Hasselbalch Equation Online
Free pH Buffer Calculator using the Henderson-Hasselbalch equation. Find buffer pH from pKa and acid/base ratio, or find the ratio needed for a target pH.
Titration Calculator – Find Unknown Concentration (Acid-Base)
Free Titration Calculator for acid-base reactions. Enter titrant volume, concentration and mole ratio to find the unknown concentration of your analyte instantly.
Specific Gravity to ABV Calculator – Original & Final Gravity
Free Specific Gravity to ABV Calculator for homebrewers. Enter original and final gravity readings to instantly calculate alcohol by volume percentage.