ConCalc - Concrete Calculator

Contains ads
528 reviews
Content rating
Everyone
100K+
Downloads
Content rating
Everyone
Users Interact
Learn more
Screenshot image
Screenshot image
Screenshot image
Screenshot image

About this app

Know exactly how much concrete to order. ConCalc works out the volume for the shapes you actually pour, in cubic yards or cubic meters, and adds them into one running total.

Built for contractors and for anyone doing it themselves.

TWELVE SHAPES
Slabs — rectangular, round, semicircle, or straight from an area. Footings, walls, curbs, curbs with gutter, square and round columns, steps, and drainage channels. Each one asks only for the dimensions it needs, with a diagram showing what you're measuring.

ONE JOB, ONE TOTAL
Save calculations into a named project and keep a job on file for as long as it runs. Subtract a cutout or an opening from the total. Add a waste allowance and see it carried through to the figure you order from.

WHAT TO ORDER, AND WHAT IT COSTS
Buying ready-mix? Price it by volume. Buying bags? Choose from nine bag sizes, 40 lb through 40 kg, and get the bag count and the cost together.

TAKE IT OFF THE PHONE
Export a project as a CSV and send it wherever it needs to go — email, messages, or a spreadsheet.

ON THE JOBSITE
• US or metric units
• English, Spanish, Portuguese and French
• Works with no signal — no internet connection required
• No ads, no account, no tracking
Easy and running total concrete volume (Cubic Yards, Cubic Meters) calculator.
Updated on
Aug 14, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • No data collected
    Learn more about how developers declare collection

Ratings and reviews

501 reviews
Seth Davis
August 17, 2026
I've been using this app for years, it's been a life saver... it's great for quick figures for call backs, perfect for 60-80lb bag count for small jobs... love the new update guys, thx so much for creating this app!
Did you find this helpful?
Luso Studios
September 16, 2026
So glad to hear it and i am a solo developer that needed this type of application for my own needs, and then decided to share it. I'm delighted that it helps others.
A Google user
April 11, 2020
I like the old version better because on small quantities it would give you the number of 60 or 80# bags needed. This version is still great for our big jobs but would like to have the option for number of bags for small jobs.
4 people found this review helpful
Did you find this helpful?
Luso Studios
May 13, 2020
In order to see the quantity of bags needed click on the volume once a calculation is done. Thank you for providing your valuable feedback. Please reach out to me at Scardoso95@gmail.com, if you have other suggestions or questions.
Dustin Rubio
May 3, 2020
I miss the old version that told you how many bags needed for my small projects at home. This is fine for big jobs but and very disappointed. If used the app for years but am now going to search around for a different one..
3 people found this review helpful
Did you find this helpful?
Luso Studios
May 13, 2020
In order to see the quantity of bags needed click on the volume once a calculation is done. Thank you for providing your valuable feedback. Please reach out to me at Scardoso95@gmail.com, if you have other suggestions or questions.

What’s new

Now in Spanish, Portuguese and French.
• Cost estimates — price a pour by the cubic yard or by the bag
• Nine bag sizes, matched to what your market actually sells
• Projects — name a job, keep its calculations together, export to CSV
• Every shape redrawn, from slabs and footings to stairs and columns
Also: decimal entry now reads a comma correctly, and swipe-to-delete only fires on a full swipe.
Content rating
Everyone
Users Interact
Learn more

App support

About the developer
Sergio M Cardoso
info@lusostudios.com
62 Morris Ct South Amboy, NJ 08879-2283 United States