Builder's Formulator
Not in any tracked top chart right now.
Updated 25 Oct 2026 · rankings refresh through the day
DeveloperHistorycentral.com
CategoryBusiness
PriceFree
Released
Rating★ 2.0 (3)
Version4.1
Age rating4+
First seen by us
24 Oct 2026
Rating
2.0 ★
3 ratings
Measured
Builder's Formulator on the App Store
App details
App ID
306247596
Publisher
Historycentral.com Inc
On the store since
Feb 2009
17 years on the store
Minimum OS
iOS 26.4+
iPhone 11 and later
Devices
iPhone · iPad
Universal purchase
Content rating
4+
Languages
1
EN
Size
50 MB
Also listed in
Productivity
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Not charting right now. | ||
Ratings
App Store, worldwide.
Rating
2.0 ★
3 ratings
Measured
Ratings
3
Measured
About Builder's Formulator
Builder's Formulator is the ultimate professional reference tool for general contractors, builders, plumbers, HVAC technicians, and
electricians. With over 2,600 formulas, 136 plumbing code charts, 27 technical drawings, and complete ADA accessibility references,
it's the most comprehensive construction calculator available.
CONSTRUCTION — Calculate joists, studs, headers, hardwood flooring costs, concrete and excavation volumes, bricks needed for a wall,
roofing materials, stair dimensions, lumber requirements, and acoustic absorption. Includes material weight references for dozens of
building materials.
STRUCTURAL ENGINEERING — Comprehensive beam analysis for single-span and cantilevered beams with point loads, uniform loads, and
triangular loads. Concrete design for flexure, shear, axial compression, and prestressed concrete. Masonry stress analysis, steel
design, wood design, flat plate calculations, soil bearing capacity, and road/highway formulas.
ELECTRICAL — Calculate kilowatts, horsepower, efficiency, power factor, watts, amps, resistance, and voltage. Includes transformer
calculations, voltage drop analysis, motor sizing, battery calculations, AC/DC circuits, Ohm's Law, impedance, frequency conversions,
and UPS sizing.
PLUMBING & HVAC — Pipe sizing, flow velocity, friction loss, pressure calculations, drainage and venting, storm drainage, gas piping,
water heater sizing and recovery, pump horsepower, septic and sewage systems, grease interceptors, thermal expansion, water supply
sizing, medical gas piping, and swimming pool calculations. Boiler efficiency, condensation, and comprehensive water flow analysis.
HVAC SYSTEMS — Dedicated ductwork and duct sizing, fan laws, pump laws, gas laws, hydronic formulas, psychrometrics, ventilation
rates, heating design, refrigeration, steam systems, air change rate equations, humidity calculations, and heating/cooling load
analysis.
FINANCIAL — Mortgage calculations, depreciation, investment analysis, interest formulas, debt ratios, and price quotes.
REFERENCE LIBRARY — 136 plumbing code charts and tables covering gas piping, drainage, venting, backflow prevention, medical gas,
thermal expansion, fixture units, and more. 27 technical drawings for venting systems, chimney terminations, gas clearances, and water
heater installations. Complete ADA accessibility reference with 52 diagrams and 17 documents covering wheelchair dimensions, grab
bars, ramps, parking, elevators, and restroom clearances. Plus built-in reference tables for occupancy loads, brick sizes, lumber
dimensions, wire gauge, concrete mixes, and insulation R-values.
CONVERSIONS — Hundreds of unit conversions across pressure, volume, linear measure, area, weight, flow, power, BTU, and eight
temperature scales including Celsius, Fahrenheit, Kelvin, and Rankine.
FEATURES — Save and revisit calculations, mark favorites for quick access, toggle between US and metric units, export
electricians. With over 2,600 formulas, 136 plumbing code charts, 27 technical drawings, and complete ADA accessibility references,
it's the most comprehensive construction calculator available.
CONSTRUCTION — Calculate joists, studs, headers, hardwood flooring costs, concrete and excavation volumes, bricks needed for a wall,
roofing materials, stair dimensions, lumber requirements, and acoustic absorption. Includes material weight references for dozens of
building materials.
STRUCTURAL ENGINEERING — Comprehensive beam analysis for single-span and cantilevered beams with point loads, uniform loads, and
triangular loads. Concrete design for flexure, shear, axial compression, and prestressed concrete. Masonry stress analysis, steel
design, wood design, flat plate calculations, soil bearing capacity, and road/highway formulas.
ELECTRICAL — Calculate kilowatts, horsepower, efficiency, power factor, watts, amps, resistance, and voltage. Includes transformer
calculations, voltage drop analysis, motor sizing, battery calculations, AC/DC circuits, Ohm's Law, impedance, frequency conversions,
and UPS sizing.
PLUMBING & HVAC — Pipe sizing, flow velocity, friction loss, pressure calculations, drainage and venting, storm drainage, gas piping,
water heater sizing and recovery, pump horsepower, septic and sewage systems, grease interceptors, thermal expansion, water supply
sizing, medical gas piping, and swimming pool calculations. Boiler efficiency, condensation, and comprehensive water flow analysis.
HVAC SYSTEMS — Dedicated ductwork and duct sizing, fan laws, pump laws, gas laws, hydronic formulas, psychrometrics, ventilation
rates, heating design, refrigeration, steam systems, air change rate equations, humidity calculations, and heating/cooling load
analysis.
FINANCIAL — Mortgage calculations, depreciation, investment analysis, interest formulas, debt ratios, and price quotes.
REFERENCE LIBRARY — 136 plumbing code charts and tables covering gas piping, drainage, venting, backflow prevention, medical gas,
thermal expansion, fixture units, and more. 27 technical drawings for venting systems, chimney terminations, gas clearances, and water
heater installations. Complete ADA accessibility reference with 52 diagrams and 17 documents covering wheelchair dimensions, grab
bars, ramps, parking, elevators, and restroom clearances. Plus built-in reference tables for occupancy loads, brick sizes, lumber
dimensions, wire gauge, concrete mixes, and insulation R-values.
CONVERSIONS — Hundreds of unit conversions across pressure, volume, linear measure, area, weight, flow, power, BTU, and eight
temperature scales including Celsius, Fahrenheit, Kelvin, and Rankine.
FEATURES — Save and revisit calculations, mark favorites for quick access, toggle between US and metric units, export
Latest updates
4.1
Expanded handling of metric calculations