Jurisdiction-aware legal calculators

Legal math, traced to the source.

Deadlines, interest, and damages, computed against verified primary law and delivered with the citation attached. Run one calculation or build a full case analysis.

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Transparent calculations. Every figure shows the work, so you can check it before you file.

Jurisdiction-specific rules. All 50 US states, federal, and 14 more countries.

Court-ready outputs. Export to PDF, Word, or CSV, formatted for a filing.

Judgment interest

California

Principal amount

Interest rate (%)

Days elapsed

Total owed

$146,755.14

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Calculated per Cal. Code Civ. Proc. § 685.010

Live preview. Change any figure.

75JurisdictionsSpanning 15 countries, including all 50 US states

9,000+Reference articlesPlain-language guides to the rules the calculators apply

How It Works

Get accurate, jurisdiction-specific legal calculations in three simple steps

Select Calculator

Choose from jurisdiction-aware calculators covering everything from judgment interest to court deadlines.

Enter Details

Input your case details with real-time validation and jurisdiction-specific rules automatically applied.

Get Court-Ready Results

Export to PDF, Word, or CSV with detailed explanations, citations, and court-ready formatting.

Why DocketMath?

Built for lawyers who care about getting it right the first time

Accuracy & Trust

Clear, reviewable calculations designed to reduce spreadsheet-style errors.

Save Time

Hours of manual work reduced to seconds. Focus on winning cases, not wrestling with spreadsheets.

Court-Ready Exports

PDF, Word, and CSV exports with detailed explanations, citations, and professional formatting.

Full Case Analysis

Chain multiple calculators into a single matter. Compare the same case across jurisdictions. Export complete reports.

Rules With Their Sources

Rules across 15 countries and 75 jurisdictions, with on-demand research beyond. Sources shown where available.

Spreadsheet Health Checks

Turn “looks fine” spreadsheets into confidence. Get a fast health report, safe fixes with examples, and clear calculator recommendations. Scans run in your browser; we only save metadata and results to your workspace.

Workspaces for Real Legal Work

Keep your calculations and supporting artifacts organized in one place. Save runs, return later, and export court-ready outputs when you need them.

Build a Complete Case Analysis

Chain calculators together into a single matter. Five ready-made templates for personal injury, employment disputes, debt collection, family law, and real estate.

Chain Calculators

Outputs from one step automatically feed the next. Damages flow into interest. Interest flows into attorney fees. No re-typing numbers.

Compare Jurisdictions

Run the same case across multiple states. See which jurisdiction gives the best recovery, the shortest deadline, or the most favorable caps.

Export Full Reports

One-click PDF with every step, every citation. Attach it to a demand letter, bring it to a mediation, or share it with a partner.

25+ calculators, from judgment interest to statutes of limitations.

Every one jurisdiction-aware, with the governing authority shown where verified.

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Simple, Transparent Pricing

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Every calculator, with the statute behind each answer.

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All 31 calculators

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Breakdowns citing the governing statute

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Save up to 10 results

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Watermarked exports