The forms on our website are hard to manage on smaller devices.
It appears you’re using a browsing window that’s too narrow. We recommend having a width of at least 800 pixels.
Please consider using our mobile app. It’s inexpensive ($X.XX), and helps us offset our costs.
The “Unified Calculation” will do all the calculations and either print the “Unified Form” or (if your situation is a “sole” calculation) will also give you the option to create, print, and email the DC-637 form. Click here to give it a try!
Use this form ONLY if one parent is with the child(ren) 90 “days” or less in a year. “Days” has a specific meaning in the Virginia Code so be sure to get advice on how to count your “days.” Use of this form indicates your acceptance of all risks. See notes at the bottom of the page! If you have ANY doubt about which calculator to look at, please consult your attorney!
Press the HELP button to get more detail on how to fill the form out.
Press the Enter Non-Monthly Amounts button so you can enter annual, monthly, weekly, etc. amounts in any field. When you use the Print Form button, you can print either the monthly amounts or the full detail as entered.
Every effort has been taken to make the calculations provided by this site to be as accurate as possible.
However, the calculations require a legal understanding of what information goes into the formulas.
Your use of this site is for general guidance only and is NOT a substitute for obtaining legal advice. Nothing on this web site should be considered legal advice nor create even the appearance of an attorney/client relationship. Please consult an attorney for legal advice as it relates to your situation.
© 2025 Daniel R. Burk. All Rights Reserved.
We just completed a major upgrade to the Unified form.
We’ve made it extra easy to use the data in the Unified Form to print the DC Forms.
Shortly, we will be eliminating the DC 637, 638, and 640 input forms! The input screens for the DC-637, 638 and 640 will be eliminated. If you must print out the old DC forms, you'll still be able to do that from the Unified form.
In the meantime, if you use the old DC forms for input, the results may be off by a dollar or so from the Unified form. EXCEPT there is one situation where it could be way more than a single dollar caused by rounding differences: The Unified Form and the DC 637, 638, and 640 forms it produces calculate credits related to SSDI disability payments after all other calculations and adjustments. We believe that this is the correct calculation under the statute. The old DC input forms calculate the SSDI adjustments and credits before the other adjustments. In this situation, you could end up with a different result when comparing the new print-only DC forms with the DC input forms.
Support for using this DC Form for Entry will be ending. Please use the Unified Form instead!
1) Increased field space for Case Number.(09/06/17)
2) Corrected situation where statutory minimum should not replace calculation where disability payment credits exceed non-custodial parent’s obligation. Also corrected math where non-monthly amounts used for credits in lines 12.(11/24/15)
3) Problem with “Custodial” button corrected. May have existed since 4/22/15. PLEASE let us know if you see ANYTHING not working as you would expect. Easy fix, but we discovered ourselves with random testing. WE NEED YOUR INPUT!!!(04/26/15)
4) Press the “Non-Monthly Amounts” button to enter amounts for any field using monthly, annual, quarterly, weekly, semi-monthly, bi-weekly, and semi-annual amounts. Print the resulting calculations in the “standard” (i.e., monthly) format or with all the details.(04/24/15)
5) Arrow showing which parent is the "custodial parent" for the calculation now shows up on printouts.(03/25/15)
6) When entering the health insurance costs for the children on Line 7b, enter the individual amounts paid by each parent for the marginal cost for the children. These amounts will automatically be shown on Line 11.(12/10/14) Corrected.(01/18/15)
7) Sole calculator now includes required statutory minimum. There are exceptions for when the minimum might not apply, but the calculator will always include the minimum. (12/20/14)
8) At the top of the page, identify who is the "Custodial" parent, that is, the parent who is with the children for 275 days or more.(12/10/14)