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Construction Calculator A1 Pro
Concrete Steel & BOQ Estimator
Information
Preview 2 platforms
iPhone 8 images
iPad 7 images
What’s New Version 2026.04.06
What’s New
Tired of searching for the right construction formula? We’ve got you covered.
• Added new calculators for Water Tanks, Walls, Staircases, Footings, Gutters, and Tubes to handle daily site calculations easily
• Enhanced House Cost Calculator to generate professional quotations and branded PDFs for clients
• Can’t find a formula? Use Custom Calculators to create and save your own calculations
• Keep all project details organized with Rich Notes, project-wise folders, and support for images, videos, and file attachments
• Faster and smoother construction calculations with quick-action buttons designed for site use
• Access essential material details instantly with the new Material Library
This update focuses on saving time, reducing manual work, and making construction calculations simpler and more organized.
Description
The #1 construction calculator trusted by 1M+ contractors, builders, and engineers worldwide.
CONCRETE CALCULATOR
• Slabs, footings, columns, beams, stairs & circular slabs
• Instant material quantities: cement bags, sand, gravel
• Mix ratios for any project specification
REBAR & STEEL CALCULATOR
• Bar Bending Schedule (BBS) with shape codes
• Weight calculator for all bar sizes (#3-#18)
• Lap length, cover & spacing calculations
• Steel tonnage for structural estimates
FEET-INCHES CALCULATOR
• Add, subtract, multiply, divide in feet-inches-fractions
• No decimal conversion needed
• Perfect for lumber & framing calculations
AREA & VOLUME
• 15+ shapes: rectangle, circle, triangle, trapezoid & more
• Room area, paint coverage, flooring estimates
• Excavation & fill volume calculations
UNIT CONVERTER
• Length, area, volume, weight conversions
• Construction-specific units included
PROFESSIONAL FEATURES
• Bill of Quantities (BOQ) with PDF/Excel export
• Save & organize calculations by project
• Share estimates with clients instantly
• Material cost estimation
• Company branding on reports
Built for real job sites. Used by professionals in 150+ countries.
Download now and estimate like a pro.
Accessibility
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Version history 18 versions
Build 884197868v2026.04.062026-04-06 22:41:47
What’s New
Tired of searching for the right construction formula? We’ve got you covered.
• Added new calculators for Water Tanks, Walls, Staircases, Footings, Gutters, and Tubes to handle daily site calculations easily
• Enhanced House Cost Calculator to generate professional quotations and branded PDFs for clients
• Can’t find a formula? Use Custom Calculators to create and save your own calculations
• Keep all project details organized with Rich Notes, project-wise folders, and support for images, videos, and file attachments
• Faster and smoother construction calculations with quick-action buttons designed for site use
• Access essential material details instantly with the new Material Library
This update focuses on saving time, reducing manual work, and making construction calculations simpler and more organized.
Build 881757235v2026.01.042026-01-23 22:06:20
What’s New
Tired of searching for the right construction formula? We’ve got you covered.
• Added new calculators for Water Tanks, Walls, Staircases, Footings, Gutters, and Tubes to handle daily site calculations easily
• Enhanced House Cost Calculator to generate professional quotations and branded PDFs for clients
• Can’t find a formula? Use Custom Calculators to create and save your own calculations
• Keep all project details organized with Rich Notes, project-wise folders, and support for images, videos, and file attachments
• Faster and smoother construction calculations with quick-action buttons designed for site use
• Access essential material details instantly with the new Material Library
This update focuses on saving time, reducing manual work, and making construction calculations simpler and more organized.
Build 881590838v2026.01.032026-01-21 06:57:46
All new calculators (water tanks, walls, staircases, footings, gutters, tubes)
New features (house cost, custom calcs, rich notes, material library)
Build 881409822v2026.01.022026-01-12 18:21:10
New Formula Generator
Can’t find a specific calculation? Create your own custom formulas, save them, and reuse anytime. Built for real-world construction flexibility.
Enhanced Construction Calculator
Perform fast and accurate calculations like feet-inch + feet-inch, diagonal measurements, and area & volume using dedicated calculator keys.
Faster & Smarter Experience
Optimized performance for quicker results and smoother usage on site.
This update makes Construction Calculator A1 more powerful, customizable, and efficient for engineers, contractors, and construction professionals.
Build 881228833v2026.01.012026-01-06 16:50:23
What’s New in This Update
• New Formula Generator
Can’t find a specific calculation? Now create your own custom formulas, save them, and reuse them anytime. Designed for real-world construction needs with complete flexibility.
• Enhanced Construction Calculator
Quick and accurate construction calculations are now easier than ever. Perform common operations like feet–inch + feet–inch, diagonal calculations, and area & volume calculations directly using dedicated calculator keys.
This update makes calculations faster, smarter, and more customizable for site engineers, contractors, and construction professionals.
Build 869364520v2024.09.012024-10-02 21:48:39
* Multiple language support added
* Dam & Sewage Calculations: Added capacity, flow, and tank design.
* Water Supply & Rail: New tools for demand, pump power, gradient, and braking.
* Road & Brickwork: Pavement, slope, bond types, and paver block updates.
* Excavation: One trip volume and trip count.
* Other Enhancements: BOQ sharing, quiz, and location-based units.
Build 858381799v10.2023.012023-07-10 19:09:59
*Precast Boundary wall quantity added
*Shoe size converter added
*minor bug fixes
Build 852818862v10.2022.012022-10-24 03:46:45
Following quantities added
* Arc calculator
* Slope backfilling
* Helix Bar
* Plum Concrete By Volume
* Partly Fill Rectangular Tank
* Partly Fill Circular Tank
* Super Elevation
Build 852536400v09.2022.012022-09-30 18:44:02
New quantity added
- Baluster
New areas added
- Kite
- Heptagon
- Decagon
New volumes added
- Pipe Culvert
- Step Wall
- Triangular Slice
Build 851132616v2.5.52022-07-27 15:52:47
* Minor bug fixes
Build 850170433v2.5.32022-06-15 17:15:02
(1) Concrete quantities added -
- Box Footing
- Trapezoidal Footing
- Dog legged Staircase
- Various wall shapes
- various curb stone shapes
- Square tube
- Various gutter shapes
- Configure your own mix designs in new mix design section
- Detailed calculation added with pie chart
(2) Brick work quantities added -
- Stretcher bond
- Header bond
- English bond
- Flemish bond
- Cube
- Wall
- L Wall
- C Wall
- Rectangular Chamber
- Wall with door
- Wall with arch door
(3) Added in Area Section-
- Semi circle
- Ring Area calculator
- Diamond Area Calculator
- 3 different shapes
(4) In volume section-
- Hexagonal Prism
- Cylindrical Tube
- Rectangular Tube
- L Shape
- Slope Wall
- Sector Of sphere
(5) In Converter section-
- Conductivity
- Acceleration
- Magnetic field strength
- Heat Flux
- Specific volume
- Specific Heat
- Luminus Intensity
- Heat Transfer
(6) Informative home page icons
(5) small bug fixes
Build 849851177v2.5.22022-06-06 18:02:06
Update :
1. Search option added
2. UI enhancements for increasing user experience
3. Following converters added
- Fuel Converter
- Illumination Converter
- Heat Converter
- Viscosity Converter
- Magnet Field Converter
- Inertia Converter
- Permeability Converter
- Resolution Converter
- Surface tension Converter
- Torque Converter
- Flow Converter
- Radiation Converter
- Luminance Converter
4. Perimeter added in area calculators
Build 849819450v2.5.12022-06-05 13:06:03
Update :
1. Search option added
2. UI enhancements for increasing user experience
3. Following converters added
- Fuel Converter
- Illumination Converter
- Heat Converter
- Viscosity Converter
- Magnet Field Converter
- Inertia Converter
- Permeability Converter
- Resolution Converter
- Surface tension Converter
- Torque Converter
- Flow Converter
- Radiation Converter
- Luminance Converter
Build 848808357v2.5.02022-05-04 18:36:43
**Update
1. Following quantities added
AC Capacity
Swimming Pool
Solar(Electric)
Solar Water heater
Plywood Sheet
Paver Calculator
Plum Concrete
Rain Water Harvesting
Waterproofing
Shuttering
Tile Grout
2. New areas added
Sector
Pentagon
Hexagon
Octagon
Trapezoid
More Shapes
3. New volumes added
Parallelepiped
Sliced Cylinder
Barrel
4. Converters added
Resistance
Current
Voltage
*New study sections added
Construction material
Structural Analysis
Construction Management
Surveying
& many more
Build 846238425v2.0.22022-01-29 03:38:17
* bug fixes
Build 846133328v2.0.12021-12-23 23:21:40
* Metal calculator added
* Bill of quantity added(BOQ)
* minor bug fixes
Build 845637482v2.0.02021-12-03 13:26:05
Metal calculator added, Bill of quantity (BOQ) added, currency selection option in quantity, quiz, etc.
Build 844295034v1.02021-10-02 07:58:12
Price history by region
Currency
Show
Columns
Search
Availability 20 of 20 storefronts
| Region | Language | Price | Ratings | Avg | Version |
|---|---|---|---|---|---|
 US | en-US | USD 19.99 | 7 | 4.6 | 2026.04.06 |
 ZA | en-GB | ZAR 249.99 | 2 | 5.0 | 2026.04.06 |
 AE | en-GB | AED 59.99 | 1 | 5.0 | 2026.04.06 |
 CA | en-CA | CAD 17.99 | 1 | 5.0 | 2026.04.06 |
 DE | de-DE | EUR 14.99 | 1 | 5.0 | 2026.04.06 |
 AL | en-GB | USD 14.99 | 0 | — | 2026.04.06 |
 BB | en-GB | USD 14.99 | 0 | — | 2026.04.06 |
 BS | en-GB | USD 14.99 | 0 | — | 2026.04.06 |
 BZ | en-GB | USD 12.99 | 0 | — | 2026.04.06 |
 GB | en-GB | GBP 14.99 | 0 | — | 2026.04.06 |
 GY | en-GB | USD 12.99 | 0 | — | 2026.04.06 |
 MD | en-GB | USD 14.99 | 0 | — | 2026.04.06 |
 MG | en-GB | USD 12.99 | 0 | — | 2026.04.06 |
 MT | en-GB | EUR 14.99 | 0 | — | 2026.04.06 |
 NR | en-GB | USD 12.99 | 0 | — | 2026.04.06 |
 PH | en-GB | PHP 799 | 0 | — | 2026.04.06 |
 PW | en-GB | USD 12.99 | 0 | — | 2026.04.06 |
 SR | en-GB | USD 14.99 | 0 | — | 2026.04.06 |
 TT | en-GB | USD 12.99 | 0 | — | 2026.04.06 |
 VN | en-GB | VND 399000 | 0 | — | 2026.04.06 |
Change log 22 changes · BB
✎
releaseNotes updated
What’s New
Tired of searching for the right construction formula? We’ve got you covered.
• Added new calculators for Water Tanks, Walls, Staircases, Footings,
✎
description updated
The #1 construction calculator trusted by 1M+ contractors, builders, and engineers worldwide.
CONCRETE CALCULATOR
• Slabs, footings, columns, beams, stairs & c
✎
subtitle updated
Concrete Steel & BOQ Estimator
✎
name updated
Construction Calculator A1 Pro
◆
Version 2026.04.06 released
What’s New
Tired of searching for the right construction formula? We’ve got you covered.
• Added new calculators for Water Tanks, Walls, Staircases, Footings, Gutters, and Tubes to handle daily site calculations easily
• Enhanced House Co
◆
Version 2026.01.04 released
What’s New
Tired of searching for the right construction formula? We’ve got you covered.
• Added new calculators for Water Tanks, Walls, Staircases, Footings, Gutters, and Tubes to handle daily site calculations easily
• Enhanced House Co
◆
Version 2026.01.03 released
All new calculators (water tanks, walls, staircases, footings, gutters, tubes)
New features (house cost, custom calcs, rich notes, material library)
◆
Version 2026.01.02 released
New Formula Generator
Can’t find a specific calculation? Create your own custom formulas, save them, and reuse anytime. Built for real-world construction flexibility.
Enhanced Construction Calculator
Perform fast and accurate calculations
◆
Version 2026.01.01 released
What’s New in This Update
• New Formula Generator
Can’t find a specific calculation? Now create your own custom formulas, save them, and reuse them anytime. Designed for real-world construction needs with complete flexibility.
• Enhanced
◆
Version 2024.09.01 released
* Multiple language support added
* Dam & Sewage Calculations: Added capacity, flow, and tank design.
* Water Supply & Rail: New tools for demand, pump power, gradient, and braking.
* Road & Brickwork: Pavement, slope, bond types, and paver
◆
Version 10.2023.01 released
*Precast Boundary wall quantity added
*Shoe size converter added
*minor bug fixes
◆
Version 10.2022.01 released
Following quantities added
* Arc calculator
* Slope backfilling
* Helix Bar
* Plum Concrete By Volume
* Partly Fill Rectangular Tank
* Partly Fill Circular Tank
* Super Elevation
◆
Version 09.2022.01 released
New quantity added
- Baluster
New areas added
- Kite
- Heptagon
- Decagon
New volumes added
- Pipe Culvert
- Step Wall
- Triangular Slice
◆
Version 2.5.5 released
* Minor bug fixes
◆
Version 2.5.3 released
(1) Concrete quantities added -
- Box Footing
- Trapezoidal Footing
- Dog legged Staircase
- Various wall shapes
- various curb stone shapes
- Square tube
- Various gutter shapes
- Configure your own mix designs in new mix design section
-
◆
Version 2.5.2 released
Update :
1. Search option added
2. UI enhancements for increasing user experience
3. Following converters added
- Fuel Converter
- Illumination Converter
- Heat Converter
- Viscosity Converter
- Magnet Field Converter
- Inertia Converter
-
◆
Version 2.5.1 released
Update :
1. Search option added
2. UI enhancements for increasing user experience
3. Following converters added
- Fuel Converter
- Illumination Converter
- Heat Converter
- Viscosity Converter
- Magnet Field Converter
- Inertia Converter
-
◆
Version 2.5.0 released
**Update
1. Following quantities added
AC Capacity
Swimming Pool
Solar(Electric)
Solar Water heater
Plywood Sheet
Paver Calculator
Plum Concrete
Rain Water Harvesting
Waterproofing
Shuttering
Tile Grout
2. New areas added
Sector
Pentagon
He
◆
Version 2.0.2 released
* bug fixes
◆
Version 2.0.1 released
* Metal calculator added
* Bill of quantity added(BOQ)
* minor bug fixes
◆
Version 2.0.0 released
Metal calculator added, Bill of quantity (BOQ) added, currency selection option in quantity, quiz, etc.
◆
Version 1.0 released