Post-Judgment Interest Calculator

Interest on a judgment using an annual rate

Runs locally in your browser

Judgment amount ($)

Annual interest rate (%/year)

Days since judgment

Federal judgments use 28 U.S.C. § 1961 (Treasury rate). State rates differ — enter the applicable rate.

How it works

Calculate interest accrued on a court judgment at a specified annual rate.

Who it's for: Creditors and attorneys tracking post-judgment amounts owed.

Interest = judgment amount × (annual rate ÷ 100) × (days ÷ 365).

Shows total owed including principal and accrued interest.

Federal judgments use the Treasury rate under 28 U.S.C. § 1961; state rates differ.

Enter Judgment amount ($), Annual interest rate (%/year), and Days since judgment.
Read Interest accrued and Total owed.

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