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Both calculators run independently — change the inputs on either side to compare results.

Parts Per Million Calculator

Calculate the concentration of a solute in parts per million (ppm) by mass. Ideal for environmental testing, water quality analysis, and trace-level chemical measurements.

Mass of solute (g)

Total mass of solution (g)

Fill in the required fields to see your result.

Chemistry

Activation Energy Calculator

Calculate the activation energy of a chemical reaction from rate constants at two temperatures using the Arrhenius equation. Widely used in kinetics research, catalyst design, and shelf-life studies.

Rate constant 1 (s⁻¹)

Temperature 1 (K)

Rate constant 2 (s⁻¹)

Temperature 2 (K)

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Key differences

	Parts Per Million Calculator	Activation Energy Calculator
Category	Chemistry	Chemistry
Inputs required	2	4
Result	Concentration (ppm)	Activation Energy (J/mol)
What it does	Calculate the concentration of a solute in parts per million (ppm) by mass. Ideal for environmental testing, water quality analysis, and trace-level chemical measurements.	Calculate the activation energy of a chemical reaction from rate constants at two temperatures using the Arrhenius equation. Widely used in kinetics research, catalyst design, and shelf-life studies.