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

Carbon atoms

Required integer input.

Estimate the M+1 to M peak intensity ratio from carbon count times 0.011 for natural 13C abundance of 1.1 percent. 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]

M+1 over M ratio

The resulting m+1 over m ratio returned as a number.

• Radioactive and nuclear calculations require the correct isotope, decay mode, mass convention, and time unit. Branching, daughter products, detector efficiency, shielding, and uncertainty in tabulated nuclear data may require a fuller model.
• 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.

• Isotopic Abundance Calculator

  Solve the two-isotope percent abundances that produce a known weighted-average atomic mass.

• Mass Spec m/z Calculator

  Compute the mass-to-charge ratio as the neutral mass plus charge times the proton mass divided by the charge.

• Plate Number N

  Compute the theoretical plate number N as sixteen times the square of the ratio of retention time to baseline peak width.