Use this chemistry calculator to reproduce a named relationship with explicit quantities and units for study, laboratory planning, or an independent numerical check.

Integration A

Required number input.

Integration B

Required number input.

Normalize two NMR integrals so the smaller value becomes one and report the proton ratios rounded to two decimals. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Proton ratio A

The resulting proton ratio a returned as a number.

Proton ratio B

The resulting proton ratio b returned as a number.

• NMR shifts, integrations, and couplings depend on nucleus, field, solvent, temperature, referencing, pulse sequence, relaxation, exchange, and spectral processing. A compact calculation does not assign a structure or resolve overlapping signals.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check units and significant figures, compare the result with limiting cases, and use measured or source-specific constants where available. Laboratory, safety, and regulatory decisions require validated methods and appropriate uncertainty analysis.

• Empirical Ratio Calculator

  Divide two element mole amounts by the smaller one to obtain whole-number-friendly empirical ratios.

• Doubly Charged m/z

  Compute the mass-to-charge ratio of a doubly charged ion as the neutral mass plus two proton masses divided by two.

• Activation Energy Two-Temperature

  Compute activation energy in J/mol from rate constants at two temperatures as R times ln(k2/k1) over one over T1 minus one over T2.