Apparel / Best Sellers
Black t-shirt with "1+1+1=1" and Matthew 28:19 text graphic in a classic style.

Catholic Math T-Shirt - Multiple Sizes

Sale price$32.95
Low stock: Less than 10 remaining

Celebrate the mystery of the Holy Trinity with this black Catholic Math T-Shirt, featuring the equation 1+1+1=1. Designed by The Catholic Company, this shirt explains the core of Christian faith with a reference to Matthew 28:19. Made from a comfortable blend of polyester, cotton, and rayon, it's a unique gift or wardrobe addition. Available in multiple sizes, showcasing faith in a fun, stylish way. See more...

Size: S
Product information
  • Black short sleeve T-shirt
  • The mystery of the Holy Trinity: 1+1+1 =1 
  • Fun, faithful and functional
  • Great Catholic gift or unique addition to your own wardrobe
  • Designed and produced exclusively by The Catholic Company
Catholic Math is one part sense and one part mystery, with this faithful, fun, and unique T-shirt. It features a simple explanation of the Holy Trinity. How much easier can you get?! 

The shirt reads 1+1+1=1, representing the Father, Son, & Holy Spirit who form the Blessed Trinity.

Below this basic equation for the Christian faith is a Scripture reference to Matthew 28:19, "Go therefore, and make disciples of all men, baptizing them in the name of the Father and of the Son and of the Holy Spirit."

Need we say more? It's the central mystery of our Faith, a unique gift for any Christian, and a great addition to your own wardrobe. 


© Copyright 2024 - 2025 Trinity Road LLC/The Catholic Company


SKU: CD4ZABUC1ZZ2

  • Various Sizes Available
  • 50% Polyester, 25% Cotton, 25% Rayon
  • Classic Fit, Pre-shrunk

Satisfaction Guaranteed

The Catholic Company is committed to your complete satisfaction. For over 27 years, we have proudly served our customers by offering meaningful, high-quality Catholic products that inspire and support your faith journey.

Our Promise to You:

  • We stand behind every product we sell with a commitment to your happiness. If you are not satisfied, we’ll work with you to make it right.
  • 30-Day Return Policy: Most items can be returned within 30 days of purchase. Simply reach out to our dedicated customer service team to initiate your return.
  • Guardian Angel Protection: Choose this optional coverage at checkout, and if your item is lost, damaged, or stolen, we’ve got you covered.

Your satisfaction and trust are important to us. Contact us by email, phone, or live chat for assistance with any order, and rest assured—we’re here to help. Thank you for choosing The Catholic Company to be part of your faith journey.

Questions?

For more details on returns, exchanges, or to start a return, our friendly customer service team is ready to assist.
Guided by Tradition
No Hassle Returns
Packaged with Prayer
Delivers by: Jul 2 - 5

Overall rating: 4.75 / 5 from 8 reviews.

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Reviews

Love it!

"This shirt is a conversation piece. I love it!!! Describes the Doctrine of the Trinity perfectly. But you have to know the Doctrine to get the message!. So cool!!!"

— E. R. (5/5)

The perfect gift for my

"The perfect gift for my grandson who loves math! Great quality shirt."

— Joan S. (5/5)

Using the wrong operation

"If I could make a comment, being a Catholic and a high school math teacher, the shirt should be 1*1*1=1 because God is being multiplied not added because the adding would imply that Father, Son, and Holy Spirit are separate not 1."

— HRW (5/5)

The material is so soft,

"The material is so soft, love the feel."

— ANNA C. (5/5)

love it

"LOVE THIS T-SHIRT"

— Jeanne T. (5/5)

Very lightweight material.

"Very lightweight material."

— GREGORY G. (3/5)

Love this shirt

"Love this shirt"

— Mark P. (5/5)

Math T shirt

"Excellent"

— TRUDY C. (5/5)

Q&A

Are these Men’s sizes?
Thank you for your question. Our T's are unisex and yes, the sizes are standard men's sizes.