Drill Calc vs Home Improvement Calcs

Need to find the right drill bit size for a hole? Drill Calc calculates the correct drill bit size to use for threaded holes, based on the bolt (tap) diameter and thread pitch and percentage, for both inch and metric threads. Close and tight fit hole sizes for many popular drill sizes are also displayed. It also has tables of standard inch fractional and numeric drill bit sizes, as well as complete information for various pipe sizes. There is also detailed information about the commonly used sizes of wood screws. Buy your copy of Drill Calc today, and put away your drill chart.

Home Improvement Calcs has over 250 do-it-yourself and home improvement calculations and unit conversions. Home Improvement Calcs gives you access to quickly and easily solve a variety of calculations from your iPhone or iPad. Easy to use and understand inputs and results in either decimals or fractions. Not just calculators but the ability save and open saved calculations and add calculators to a favorites list. You can also email calculator inputs and results so you can easily share your calculations. Search functionality enables you to quickly find the calculator you want. Current Calculators include: Concrete & Bricks * Asphalt * Block Wall - Based on Area * Block Wall - Based on Length and Height * Brick Wall * Concrete Column or Circular Slab * Concrete Footings * Concrete Post Holes * Concrete Rectangular Slab * Paver Bricks * Sand * Stone Retaining Wall Electrical * Amps from Watts and Volts * Amps Required for Circuit * Electricity Cost * Volts from Amps and Watts * Watts from Amps and Volts Framing * Rafter Length for Common - Pitch * Rafter Length for Common - Pitch Unknown * Rafter Types * Roofing Terms * Roof Pitch * Roof - Degrees to Pitch, Slope and Grade * Roof - Pitch to Degrees, Slope and Grade * Roof - Slope to Pitch, Degrees and Grade * Roof - Grade to Pitch, Degrees and Slope * Square Construction * Staircase * Stairs Best Step Height * Stairs Best Tread Width Heating & A/C * Airflow * Attic Ventilation * Ceiling Fan Sizing * Exhaust Fan Sizing Based on Fixtures * Exhaust Fan Sizing Based on Room Size * Heating Estimator * Whole House Fan * Window Air Conditioner Size Interiors * Carpet and Linoleum * Interior Paint * Tile * Tongue & Groove Flooring * Wallpaper Lumber & Materials * Board Feet and Cost * Caulking Length * Caulking Required * Drywall - Advanced * Drywall - Basic * Insulation - Attic * Insulation R-Value * Lumber Dimensions * Roofing Materials from Area * Roofing Materials from Pitch, Length and Width * Studs Miscellaneous * Belts and Pulleys * Cylindrical Tank - Horizontal Level * Cylindrical Tank - Vertical Level * Leaking Faucet Water Usage * Tank Fill Time * Weight of Liquids * Wrench Conversion Yard * Acreage * Backfill * Backfill on a Slope * Driveway Sealer * Fertilizer Coverage and Cost * Fertilizer - Nitrogen * Fill & Ground Cover * Grade from Rise and Run * Grade from Slope Length and Rise * Insecticide Coverage and Cost * Plant Quantity * Lawn Grass Coverage and Cost * Lawn Mowing * Sand Box * Mulch * Tree Height * Yard Area Area, Volume & Angle * Arc Length, Area, and Perimeter * Circle Area and Circumference * Cone * Cube (or Box) Surface Area and Volume * Cylinder Surface Area and Volume * Polygon Area and Sides from Apothem * Polygon Area and Sides from Radius * Pyramid * Rectangle Area and Perimeter * Trapezoid Area * Triangle Angle and Diagonal * Triangle Rise and Diagonal * Triangle Rise and Run * Triangle Area * Sphere Surface Area and Volume * Square Area and Perimeter Conversions * Airflow * Air Pressure * Angle * Area * Density * Electrical Current * Electrical Power * Electrical Voltage * Energy * Flow Rate * Fluid * Fuel Mileage * Length * Mechanical Power * Money * Speed * Temperature * Torque * Volume * Weight Sensor Angles * A set of 10 calculators that use the device's angle sensing ability to easily and accurate measure an angle. Project Estimator * Over 55 different estimators for Carpentry, Installation, Concrete and more. Project Dates & Times * Over 35 calculators help you understand and manage project timing and deadlines. More calculators coming soon in free updates! If there's a calculator you'd like to see added, visit our website and send us an email.