Okla. Stat. tit. 23 § 6
Current through Laws 2024, c. 453.
Any person who is entitled to recover damages certain, or capable of being made certain by calculation, and the right to recover which is vested in him upon a particular day, is entitled also to recover interest thereon from that day, except during such time as the debtor is prevented by law, or by the act of the creditor from paying the debt.
Okla. Stat. tit. 23, § 6