Free calculators for dust collection, air compressors, heating, and electrical. Get the right equipment the first time.
Each calculator gives you exact specifications, plain-English explanations, and equipment recommendations.
Calculate CFM and HP requirements based on your tools and duct layout.
Calculate Now →Size your compressor based on tool CFM requirements.
Calculate →Calculate total load and subpanel requirements.
Calculate →Size a heater based on space, insulation, and climate.
Calculate →Size a mini-split for year-round heating and cooling.
Calculate →Find the optimal workbench height for your body.
Calculate →Calculate duct diameter and static pressure.
Calculate →Visualize your shop layout with clearance zones.
Plan Layout →Calculate lumber volume and estimate project costs.
Calculate →Find the right wire gauge for ampacity and voltage drop.
Calculate →Calculate cubic yards and bags for your project.
Calculate →Find tap drill and clearance hole sizes for threads.
Calculate →Calculate RPM and belt speed for pulley systems.
Calculate →Calculate weight of steel, aluminum, and other materials.
Calculate →Minimize waste and plan your sheet cuts efficiently.
Optimize →Calculate how many gallons of paint you need.
Calculate →Find calculators and guides specific to your workshop type.
Dust collection, workbenches, and layout planning for wood shops.
Electrical, air compressors, and ventilation for metal shops.
Air systems, heating, and electrical for garage workshops.
Maximize limited space with smart layout and equipment choices.
Complete guide to dust collection systems and sizing.
Air compressor sizing and pneumatic tool requirements.
Subpanel sizing, circuit planning, and load calculations.
Heater BTU and mini-split sizing for year-round comfort.
Quick-lookup charts for common workshop specs. Searchable, sortable, and always free.
Fractional, number, letter, and metric drill bit sizes with tap drill references.
View Chart →SAE and metric torque specs for Grade 2/5/8 and Class 8.8/10.9/12.9 fasteners.
View Chart →Screw gauges, pilot hole sizes, and recommended lengths by material thickness.
View Chart →Pilot hole sizes for wood screws in softwood and hardwood by gauge.
View Chart →Nominal vs. actual lumber sizes for common dimensional lumber and plywood.
View Chart →13 reference charts for drill bits, fasteners, lumber, sandpaper, and more.
View All →Expert-tested reviews to help you pick the right workshop equipment.
Cabinet, contractor, hybrid, and jobsite saws tested and ranked.
Read Guide →8 dust collectors ranked by CFM for small and large shops.
Read Guide →9 air compressors tested for garages and workshops.
Read Guide →Top shop vacs for workshops — from budget to heavy-duty.
Read Guide →Benchtop and stationary planers compared for hobbyists and pros.
Read Guide →20+ guides covering table saws, dust collectors, jointers, and more.
View All →Three steps to the right equipment for your shop.
Tell us about your workshop size, tools, and requirements. Our calculators adapt to your specific situation.
Receive exact specifications with plain-English explanations. Understand why, not just what.
See equipment recommendations that match your calculated requirements. Compare options and buy with confidence.
All our calculators, reference charts, and exclusive planning tools — in one downloadable Excel workbook. Save your data, work offline, plan smarter.