Tm Calculator

This tool calculates the Tm using the nearest-neighbor method based on the primer's nucleotide sequence.

Results

Primer Sequence-
Reverse Complement-
Length- bases
GC Content- %
Tm- ℃

Note

  • This tool calculates the Tm using the nearest-neighbor method based on the primer's nucleotide sequence.
  • Please consider this as one of the parameters when designing primers.
  • Tm is the temperature at which 50% of the double-stranded DNA dissociates into single-stranded DNA.
  • It is said that the reaction works best when the annealing temperature for PCR is set at a temperature about 5℃ lower than the Tm
  • The annealing temperature for PCR is typically set between 55℃ to 60℃.
  • The values of ΔH and ΔS are taken from the reference.
  • By checking the box for “Multiple Sequences“, you can calculate the Tm of multiple primer sequences at once.

References