About SpousalCalc

Free, statute-accurate family law calculators for the English-speaking world — built by a team that has lived through divorce and understands what the numbers actually mean.

Updated April 2026 290+ calculators · 50 US states · UK / CA / AU / NZ No tracking · No accounts

Our Mission

Family law decisions — divorce, child support, alimony, property division, marriage finances — sit at the intersection of the most consequential choices people make and the highest emotional stress they will ever experience. The people who need clear answers most urgently are usually the least positioned to pay $350/hour for preliminary calculations.

SpousalCalc.com exists to give those people the math — accurately, privately, free — so they can walk into an attorney's office with informed questions rather than blank panic.

What We Publish

How We Build Calculators

Every calculator on this site follows a four-step construction process. We document this in detail in our Methodology.

  1. Primary source research. We read the actual statute, court rule, or administrative guideline — not secondary articles. For example: California Family Code §4055(b)(3) after SB 343, New York Domestic Relations Law §240(1-b), UK Child Support Maintenance Calculation Regulations 2012.
  2. Implementation. We code the formula in JavaScript, with every variable mapped to a specific statutory provision.
  3. Cross-check. We verify results against official government calculators where they exist (Texas OAG, California DCSS, UK CMS, Services Australia) and against worked examples from legal treatises.
  4. Documentation. Every page cites its sources, shows the formula, walks through a realistic example, and clearly states when professional advice is required.

Editorial Principles

Our Editorial Policy commits us to five principles:

Who We Are

SpousalCalc is built and maintained by a small editorial team with firsthand experience of divorce and family finance decisions across multiple jurisdictions. We draw on legal research from certified family law specialists and Certified Divorce Financial Analysts (CDFAs) for technical review of our most consequential calculators.

We are not a law firm. We do not provide legal advice. We build calculators that help you understand your numbers — which is a precondition for every good legal conversation, not a substitute for one.

Privacy by Design

We built SpousalCalc with a specific constraint: people entering their income, their spouse's income, and custody arrangements into a divorce calculator should never have to wonder where that data goes. The answer is nowhere. Every calculation runs entirely in your browser. We have no server-side database of user inputs because we never collect them. We use Cloudflare's privacy-preserving analytics (no cookies, no personal data). We have nothing to leak because we have nothing to store.

See our Privacy Policy for the technical details.

What We Are Not

See our full Disclaimer for additional context.

How We Stay Current

Contact & Corrections

We take accuracy seriously. If you find a calculator that produces an incorrect result, a sources section that cites an outdated statute, or content that is unclear or wrong, please tell us.

Email: [email protected]
For corrections: Include the URL, the inputs you used, the result you got, and the result you expected (with a source if possible). We respond within 72 hours and credit the reporter in our changelog if they want credit.