Gallons Per Minute Calculator: fast, accurate, and built for real-world flow Need to know how quickly water moves through a pipe or a hose? This Gallons Per ...

Roof Pitch Calculator — Convert Rise & Run to Angle, Percent, and Rafter Length Use this roof pitch calculator to turn quick measurements into clear ...

Board Foot Calculator When you shop for hardwood lumber you pay by the board foot. Our calculator removes the guesswork, so you can plan your cut list, ...

Vapor Pressure of Water Calculator (kPa, mmHg, psi and more) Get fast, accurate vapor pressure of water or ice at any temperature. Convert between kPa, Pa, ...

Rate Constant Calculator Use this Rate Constant Calculator to quickly find the reaction rate constant (k), the rate of reaction, a missing concentration, or ...

Chemical Name Calculator Need a fast way to turn ions into a correct compound name or formula? The Chemical Name Calculator lets you select a cation and an ...

Arrhenius Equation Calculator The Arrhenius Equation Calculator lets you solve for the rate constant k, activation energy Ea, pre-exponential factor A, or ...

Water Hardness Calculator Use this water hardness calculator to turn routine lab numbers for calcium and magnesium into a clear hardness value you can act on. ...

Henderson–Hasselbalch Calculator Buffer chemistry shouldn’t feel like a maze. With this Henderson–Hasselbalch calculator you can plug in any three values and ...

Percent Solution Calculator: Easily Find w/v%, w/w%, and v/v% Concentrations When you prepare a solution for a lab, a classroom demo, or a production line, ...