DNA Grandparent Test
- Results in 1-2 business days
- Easy at-home sample collection
- 2x Testing Guarantee
- AABB, ISO/IEC 17025 & CAP-CLIA Accredited
- Serving Families Across [the_region]
Grandparent DNA Testing
When direct parent-child testing isn’t possible, our DNA Grandparent Test provides the answers you need. This specialized genetic analysis determines the biological relationship between a potential grandparent and grandchild with scientific precision, offering families clarity during difficult or uncertain times.
Ideal when you need to establish:
- Whether your son or daughter is the biological parent of a child
- Grandparent-grandchild relationships for legal or personal reasons
- Family connections when the parent is deceased, missing, or refuses testing
- Biological relationships for inheritance, custody, or immigration cases
How it Works
Order your DNA Kit
Place your order online, and we’ll send you a DNA test kit with everything you need to collect your samples.
Collect your Samples
Follow the detailed, step-by-step instructions to collect DNA samples using the provided mouth swabs.
Lab Analysis
Use the provided return envelope to mail your DNA samples to our accredited laboratory for analysis.
Receive Results
Download your DNA results from your online account within 1-2 business days of sample receipt at the lab.
Establish Grandparent-Grandchild Relationships with Confidence.
DNA Tests Direct is committed to providing accurate, private, and reliable DNA testing services for families across the United States. Here’s what sets our grandparent DNA test apart:
- Accredited Laboratory: Our testing laboratory holds major international accreditations, including AABB, CAP, and CLIA, ensuring your test is performed to the highest international standards.
- Fast and Secure Results: Receive your confidential results through our secure online portal in just 1-2 business days from when our lab receives your samples.
- Comprehensive Analysis: Our laboratory analyzes up to 27 genetic markers to deliver the most accurate statistical assessment of the potential grandparent-grandchild relationship.
- Dual-Process Testing: Every test undergoes our dual-process analysis, meaning your samples are independently tested twice to ensure maximum accuracy.
Understanding Your DNA Grandparent Test Results
Your DNA Tests Direct Grandparent Test report will provide a “Combined Kinship Index.” This is a statistical score indicating how likely it is that the tested individual is the biological grandparent of the child. The test is based on the fact that a child inherits a predictable amount of DNA from their grandparents through their parents. By comparing the DNA profiles of the child and the potential grandparent, we can measure the strength of this genetic link.
- A high Kinship Index (significantly above 1.0) suggests a greater likelihood of the tested grandparent-grandchild relationship. The stronger the index, the more compelling the evidence.
- A Kinship Index close to 1.0 can be inconclusive, meaning the genetic evidence doesn’t strongly confirm or deny the relationship based on the tested individuals alone.
- A low Kinship Index (significantly below 1.0) suggests it’s less likely the individuals share the tested grandparent-grandchild relationship.
While testing a single grandparent can provide a strong indication, the most definitive results are often achieved by testing both grandparents from the same side of the family. Testing both individuals allows our laboratory to reconstruct a more complete genetic profile of the alleged, missing parent, which provides more genetic information to compare against the child. Our dedicated client support team is available to guide you on how to achieve the most accurate outcome for your situation and to help you interpret your results.
Why Choose DNA Tests Direct?
You don’t compromise on the things that matter, and neither do we. For over 25 years, DNA Tests Direct has been the leading choice for individuals, families, and professionals who need reliable results. We turn uncertainty into clear answers by combining proven laboratory science with a simple, efficient process that works around your schedule.
We pair this technical expertise with a deep respect for your privacy, ensuring all client information is handled with the highest degree of security. With thousands of satisfied customers worldwide, DNA Tests Direct has become the trusted choice for genetic answers that matter.
Need a DNA Grandparent Test for Legal Reasons in the United States?
Painless Mouth Swabs
Secure Online Results
Trusted Laboratory Expertise
Frequently Asked Questions
What is a DNA Grandparent Test and when would I need one?
A Grandparent DNA Test determines the statistical probability of a biological relationship between a grandparent and a grandchild. This test is a reliable option for establishing a family connection, most commonly used to indirectly establish a parental link when the alleged father is deceased, unwilling, or unavailable to participate in a standard paternity test.
The process is simple and can be done from the comfort of your own home. We send a kit with instructions for collecting a DNA sample using a painless mouth swab from the grandparent and the grandchild. If both grandparents participate, the results can be even more accurate. There is no age requirement for the person being tested, so it is a safe and easy option for grandchildren of any age. For your convenience, if the grandparent and grandchild live in different cities, we can split the kit and send the components to separate addresses.
Once the samples arrive at our laboratory, we get to work quickly to provide you with answers. You can expect your confidential results to be available through our secure online portal in just 1 to 2 business days. To ensure the highest level of accuracy, every test is run twice. While this test provides a strong indication of the likelihood of a biological relationship, it is important to note that only results from a paternity or maternity test are absolutely conclusive.
How accurate is your DNA Grandparent Test?
Our DNA Grandparent Test provides a statistical likelihood rather than the definitive results of a paternity test. The test analyzes up to 27 genetic markers through dual-process testing in our accredited laboratory. Because grandchildren share approximately 25% of their DNA with each grandparent, results are presented as a Combined Kinship Index showing how likely the grandparent relationship is compared to no relationship. Including both grandparents and/or the available parent significantly improves accuracy.
Can the DNA Grandparent Test be shipped to multiple addresses?
If participants live in different cities or countries, we can split the DNA test kit and ship components to separate addresses. Each kit part is individually barcoded for secure tracking, and testing begins once all samples have arrived at our laboratory.
To request a split kit, include the following in the “Additional Information” section at checkout:
“Please send Person A’s kit to [Name, Address] and Person B’s kit to [Name, Address].”
Note: Additional shipping fees apply for multi-address orders.
Is this test legally admissible in court?
For legal matters such as court proceedings, child custody, support cases, or inheritance claims, you will need to order the Legal DNA Grandparent Test. This test requires a chain of custody procedure to ensure the results are admissible in court. The process includes having DNA samples collected by an impartial third party, proper identification of participants, and samples being directly sent to the testing laboratory.
Click here to learn more about our Legal DNA Grandparent Test →
Does the DNA test kit expire?
No, the DNA test kits do not have an expiration date and can be stored indefinitely before sample collection. However, once a sample is collected, it’s recommended to send the kit back to our laboratory for testing within 3 months to ensure the best results.
What will my DNA grandparent test tell me?
Your DNA Grandparent Test report is centered around a single, important value: the “Combined Kinship Index.” This is a statistical score calculated by our laboratory after we compare the DNA profiles of the grandchild and the potential grandparent. The analysis determines if the amount of shared genetic material matches what is expected for a true biological grandparent-grandchild pair.
The value of this index directly translates to the likelihood of the relationship, as shown in the table below. A high index, with a value significantly greater than 1.0, indicates that the biological relationship is likely, very likely, or even practically proven; the higher the value, the stronger the evidence. Conversely, a low index value that is less than 1.0 suggests the relationship is unlikely or highly unlikely. A result of exactly 1.0 is considered inconclusive, as the genetic evidence does not lean strongly in either direction.
| Combined Kinship Index | Interpretation |
| > 10,000 | Practically proven |
| > 1,000 to 10,000 | Highly likely |
| > 100 to 1,000 | Very likely |
| > 10 to 100 | Likely |
| > 1 to 10 | Slightly more likely than unlikely |
| 1 | Inconclusive |
| 0.1 to < 1 | Slightly more unlikely than likely |
| 0.01 to < 0.1 | Unlikely |
| < 0.01 | Highly unlikely |
Is the collection process difficult?
The collection process is simple and painless. Your kit includes easy-to-use cheek swabs that you gently rub against the inside of the cheek for about 30 seconds. This collects more than enough DNA for testing without any blood or needles. The process works for everyone, including infants. Your kit includes clear instructions, and our customer service team is available if you need assistance.
How will I receive my DNA grandparent test results?
Your DNA grandparent test results are delivered electronically through our secure online portal to ensure complete privacy and confidentiality. Once the laboratory analysis is complete, we issue a notification by email, as well as by SMS for customers who opted in for text message updates during kit activation. Your comprehensive report is then made available within your account as an easy-to-understand PDF document that can be saved for your personal records. For your convenience, our online system also allows you to track the status of your test from its arrival at the lab until the moment your results are posted.
Should I test one or both grandparents?
For the most accurate and conclusive grandparent DNA test, the best approach is to test both the alleged grandmother and grandfather. Testing both grandparents allows our laboratory to build a more complete genetic profile for the alleged parent who is unavailable for testing. This provides significantly more genetic information to compare against the child, leading to a stronger, more definitive conclusion. While testing a single grandparent can still provide a strong indication of a relationship, including both grandparents greatly increases the likelihood of a conclusive result.
