Workshop Calculators

Calculate drill and bit speeds, dust collection CFM, pulley and belt speeds, and shop layout dimensions - dial in your machines for clean, safe work.

Band Saw Blade Length CalculatorBand Saw Blade Length Calculator that finds the loop from wheel size and both axle distances, then lists stock blade…Blade Height CalculatorBlade Height Calculator that sets a table saw blade for rips, dados, box joint slots and half-laps, then checks teeth…Clamp Pressure CalculatorClamp Pressure Calculator that sets clamp count, spacing and force per clamp for a glued panel or stack, and tells…Drill Bit Size CalculatorDrill Bit Size Calculator that finds pilot, clearance and countersink sizes for wood screws by wood density, plus tap drills…Dust Collection CalculatorDust Collection Calculator that totals static pressure in a duct run, checks duct speed in FPM and finds the airflow…Five Cut Method CalculatorFive Cut Method Calculator that turns two strip widths into the exact fence move, its direction and adjuster screw turns…Lathe Speed CalculatorLathe Speed Calculator that finds wood lathe RPM for a blank of any size at each stage of the turn,…Router Bit Speed CalculatorRouter Bit Speed Calculator that caps RPM by bit size, turns it into a router dial setting, and sets a…Sandpaper Grit CalculatorSandpaper Grit Calculator that matches CAMI and P-grade paper by grain size, checks each step of a full sanding list,…Table Saw Fence CalculatorTable Saw Fence Calculator determines the fence position for a rip, an offcut rip, or a centered dado cut using…Workshop Layout CalculatorWorkshop Layout Calculator checks whether shop machines fit your available floor space, accounting for infeed, outfeed, and aisle clearance around…

Woodworking Shop Calculators

A tool set up wrong burns bits, tears grain, and lets fine dust hang in the air. The right speed and the right airflow are numbers, not guesses. These calculators give you those numbers, so your machines cut clean and your shop stays safe.

Drill and bit speeds

Drill speed depends on two things: bit diameter and the material. The rule runs opposite to what people expect. Small bits and soft material run fast - a 1/4-inch bit in softwood spins around 1,500 RPM. Large bits and hard metal run slow - a 1/2-inch bit in mild steel drops to 250 to 600 RPM. Too fast and you scorch the wood and dull the bit; too slow and it rubs and wanders. Our drill speed calculator sets the RPM from your bit size and stock, so the hole comes out clean.

Dust collection sizing

Dust collection is about air speed, not just suction. Chips need roughly 3,500 to 4,500 feet per minute in the duct to stay airborne. Below that, they settle and clog the run. Size it right and you need the machine's CFM demand, the duct diameter, and the losses from bends and blast gates. Our dust collection calculator works those out, so the system actually pulls chips to the collector instead of dropping them in the pipe.

Pulleys, belts, and shop layout

The rest of the cluster covers the shop itself. Work out pulley ratios and belt speed to change a machine's RPM. Plan bit and blade speeds for the router and saw. Lay out clearances and workstation dimensions so material has room to feed. Each tool works from your real numbers, so the setup fits your shop, not a generic one.

Speeds and airflow shift with tool condition, wood species, and duct layout, so treat these as working starting points - dial from the calculated figure and adjust to how the cut sounds and the chips clear.

Safety note: fine wood dust is a health and fire hazard. Use proper filtration, grounding where needed, and respiratory protection during dusty work.