DIY & Maker

Free 3D Print Time Calculator — estimate FDM and resin (SLA/DLP) print duration, filament usage, spool consumption, and total material + electricity cost for any 3D printing project.

Free 3D Printing Filament Calculator — estimate filament cost, print cost breakdown, electricity, labor, depreciation, and remaining filament on any spool. Supports PLA, PETG, ABS, ASA, TPU, Nylon, PC, and more.

Free Arduino Pulse-Width Modulation (PWM) frequency calculator. Configure timer, prescaler, mode, and duty cycle — generates ready-to-paste Arduino C++ register setup code with waveform preview.

Free CNC Feed Rate and Speeds Calculator — compute feed rate, spindle RPM, surface speed, plunge rate, stepover, pass depth, and material removal rate for milling, drilling, and turning operations. Supports Imperial and Metric units with material presets.

Free CNC Spindle Speed (RPM) calculator — find the correct spindle speed for any tool diameter, cutting speed, and material. Includes feed rate companion output, HSS vs carbide comparison, material SFM reference table, and three calculation modes: Find RPM, Find Surface Speed, and Find Feed Rate.

Free Drill Speed and Feed Calculator — compute RPM, feed rate (IPM), chip load (IPT), cut time, and thrust force for any drill bit, material, and unit system.

Free NeoPixel and addressable LED strip power calculator. Estimate total current draw, wattage, PSU size, wire gauge, voltage drop, and power injection points for WS2812B, SK6812, APA102, and more.

Free Tap Size Calculator for cutting and forming taps — find the correct tap drill size for UNC, UNF, Metric Coarse, Metric Fine, and NPT threads with nearest standard drill bit cross-reference.