Free Child Support Calculator
All 50 States + DC (2026)
Guideline estimates for every U.S. jurisdiction, built for family law attorneys and their staff. Each state uses its own guideline model — income shares, percentage of income, or the Melson formula — with the controlling statutory authority identified for every state. No account required, and nothing you enter is stored.
Overnights always total 365 — adjusting one side updates the other.
Get the court-ready worksheet — with the guideline edition and controlling statutory citation (Va. Code § 20-108.2) — free for 14 days
- Printable court-ready worksheet with the full line-by-line calculation
- Guideline-edition badge and controlling-authority citation on the printout
- Adjustments detail: parenting-time credit, add-on allocation, deductions
- Save calculations to matters, plus spousal support and property division
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Informational estimate for licensed attorneys and their staff — not legal advice, not a guarantee of any court outcome. Verify against your jurisdiction’s official guidelines worksheet before relying on it.
Child Support Calculators by State
Every jurisdiction's calculator, with its guideline model and controlling authority.
How child support guidelines work
Every U.S. state sets child support by a published guideline. Most states use an income shares model, which combines both parents' incomes and divides the basic obligation in proportion to each parent's share. A handful use a percentage of income model, applying a statutory percentage to the paying parent's income by number of children. Delaware, Hawaii, and Montana use variants of the Melson formula, which reserves each parent's self-support needs first.
This calculator applies each state's current guideline model to produce the presumptive monthly obligation. Courts may deviate from the guideline amount based on statutory factors, and local worksheets can require additional inputs — always verify against the official worksheet for your jurisdiction.