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CALCULATORS/SLIDE RULES
FEATURING OUR BEST SELLER: SCHEDULING WHEEL CHART
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-10%Duct Sizing Calculator, English & Metric Unitswas $14.95 Special Price $13.45 -
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-10%Equal Friction Duct Calculator by Carrierwas $9.95 Special Price $8.95 -
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-10%Circuit Setter Valve Balance Procedure Calculator & Instruction Bookwas $29.95 Special Price $26.95 -
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-10%System Syzer Calculator & Instruction Bookwas $29.95 Special Price $26.95 -
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-10%Structural Steel Detail Guide, Wheel Calculatorwas $19.95 Special Price $17.95 -
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-10%Steel Weight Finder,Wheel Calculatorwas $19.95 Special Price $17.95 -
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-10%Pathfinder: Directional Conversion Wheelwas $24.95 Special Price $22.45 -
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-10%Asphalt Paving Job Calculator Slide Rulewas $7.95 Special Price $7.15 -
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-10%Stone, Concrete, Asphalt Aggregate Slide Rule Calculatorwas $9.95 Special Price $8.95 -
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-10%Concrete & Masonry Materials Estimator - Slide Rulewas $9.95 Special Price $8.95 -
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-10%Math Pie Wheels, All Grades -- Englishwas $3.00 Special Price $2.70 -
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-10%SuperCool Slide Rule Duct Calculator Flex Metal Ductulator Chartwas $34.95 Special Price $31.45 -
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-10%Structural Steel Detail Slide by Piping Selectorwas $32.95 Special Price $29.65 -
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-10%Piping Selector 150/300 Wheel Calculatorwas $32.95 Special Price $29.65 -
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-10%2021 UPC Water Pipe System Sizing Calculator, IAPMOwas $19.95 Special Price $17.95 -
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-10%2021 Natural Gas Pipe Sizing Calculator, IAPMOwas $19.95 Special Price $17.95 -
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-10%2021 Drain Waste Vent Pipe Sizing Calculator, IAPMOwas $19.95 Special Price $17.95 -
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-10%POCKET SERVICE CARD (RESIDENTIAL) For HCFC-22 Systemswas $3.95 Special Price $3.55 -
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-10%NATURAL GAS FURNACE MANIFOLD PRESSURE CALCULATORwas $9.95 Special Price $8.95 -
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-10%Westcott Metric Triangular Scale 12.5in White (TS-659)was $13.50 Special Price $12.15 -
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-10%2015 Drain Waste Vent Pipe Sizing Calculator, IAPMOwas $19.95 Special Price $17.95 -
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-10%2012 UPC Water Pipe Sizing Calculator,IAPMOwas $19.95 Special Price $17.95 -
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-10%Lufkin Architects Tape 1/8 in. & 1/4 in.was $44.95 Special Price $40.45 -
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-10%Calculated Industries Scale Master Pro 6025was $79.95 Special Price $71.95 -
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-10%Scale Master Pro XE Multi-Scale Digital Estimating Toolwas $110.95 Special Price $99.85 -
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-10%Drill Point Sharpening Gage With Imperial (Inch) Markingswas $14.95 Special Price $13.45 -
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-10%Tradesman Calc: Trades Math and Conversion Calculatorwas $44.95 Special Price $40.45 -
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-10%Construction Master Pro Workbook & Study Guidewas $29.95 Special Price $26.95 -
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-10%Construction Master Pro Trig: Feet-Inch-Fraction Calculator with Built-In Trig. Functions.was $110.95 Special Price $99.85 -
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-10%ElectriCalc Pro: Electrical Problem-Solving Calculator with 2026 Updatewas $110.95 Special Price $99.85 -
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-10%Pipe Trades Pro Advanced Pipe Trades Math Calculatorwas $99.95 Special Price $89.95 -
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-10%Measure Master Pro Feet-Inch-Fraction Calculator, Calculated Industrieswas $44.95 Special Price $40.45 -
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-10%Building Materials Estimating Calculatorwas $59.95 Special Price $53.95 -
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