California Child Support Calculator
Five questions. Sixty seconds. A clear estimate of California guideline child support — with the math shown, not just the number.
Estimate child support →
Free. No account. Your answers never leave your browser.
Built on the statute
Uses the California Family Code §4055 formula — including the post-SB 343 K-table that took effect September 1, 2024.
Shows the math
Most calculators give you a number. We show the formula with your values substituted in, so you understand why.
Privacy first
Calculation runs entirely in your browser. Nothing about your income or family is sent to our servers.