Latest Version
Version
1.0.0
1.0.0
Update
September 21, 2026
September 21, 2026
Developer
RedXApps
RedXApps
Categories
Tools
Tools
Platforms
Android
Android
Downloads
0
0
License
Free
Free
Package Name
com.RedXApps.redx_calc
com.RedXApps.redx_calc
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Report a Problem
More About RedX Construction Calculator
The 100% FREE construction calculator. REDX CALC is the feet-inch-fraction calculator for framers, carpenters, contractors and builders: rafter, stair, roof pitch and framing math with no ads, no subscriptions and no in-app purchases.
Work the way you measure: add, cut and convert full feet-inch dimensions with fractions, and switch between imperial and metric in one tap.
FEET & INCHES MATH
• Add, subtract, multiply and divide feet-inch measurements with fractions
• Adjustable fraction precision
• Instant conversion between yards, feet, inches, meters, cm and mm
• Percent, square, square root and reciprocal functions
• Memory keys and automatic calculation history
RIGHT TRIANGLES & ROOFS
• Pitch, Rise, Run and Diagonal keys: enter what you know, tap to solve the rest
• Hip/Valley and Jack rafter solvers
• Miter angles for trim and framing
STAIRS, ARCS & CIRCLES
• Stair layouts: risers, treads, stringers and the stairwell opening
• Arc solver for arched openings
• Circle facts, columns and cone volumes
DIMENSIONS
• Length, Width and Height registers for areas and volumes
• Unit-aware math keeps your results in the units you build with
KNOW-HOW BUILT IN
• Step-by-step guides for the basics, roofs, stairs, circles, conversions and more
• Light and dark mode
100% FREE. FOREVER.
No ads. No in-app purchases. No subscriptions. Every feature included.
Part of the RedX Apps family: RedX Decks, RedX Roof, RedX Walls and RedX Stairs.
Terms of Use
https://www.redxapps.com/terms-of-service
FEET & INCHES MATH
• Add, subtract, multiply and divide feet-inch measurements with fractions
• Adjustable fraction precision
• Instant conversion between yards, feet, inches, meters, cm and mm
• Percent, square, square root and reciprocal functions
• Memory keys and automatic calculation history
RIGHT TRIANGLES & ROOFS
• Pitch, Rise, Run and Diagonal keys: enter what you know, tap to solve the rest
• Hip/Valley and Jack rafter solvers
• Miter angles for trim and framing
STAIRS, ARCS & CIRCLES
• Stair layouts: risers, treads, stringers and the stairwell opening
• Arc solver for arched openings
• Circle facts, columns and cone volumes
DIMENSIONS
• Length, Width and Height registers for areas and volumes
• Unit-aware math keeps your results in the units you build with
KNOW-HOW BUILT IN
• Step-by-step guides for the basics, roofs, stairs, circles, conversions and more
• Light and dark mode
100% FREE. FOREVER.
No ads. No in-app purchases. No subscriptions. Every feature included.
Part of the RedX Apps family: RedX Decks, RedX Roof, RedX Walls and RedX Stairs.
Terms of Use
https://www.redxapps.com/terms-of-service
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