Candle Wax & Fragrance Oil Calculator - Calculate the exact amount of wax needed for your candle container and determine the correct fragrance oil percentage. Features animated candle visualization, supports multiple wax types, container shapes, and batch calculations.

Filament Cost Calculator - Calculate the true cost of a 3D print from the grams of filament used, your spool price, print time, printer wattage, and electricity rate. See an animated cost breakdown, how much of a spool each print consumes, prints per spool, failed-print allowance, printer wear, and a suggested selling price with markup.

Filament Length-Weight Converter - Convert 3D printer filament length to weight (meters to grams) or weight to length (grams to meters) for PLA, PETG, ABS, TPU, Nylon and more, at 1.75 mm, 2.85 mm, or a custom diameter. See grams per meter, meters left in a spool, an animated spool-to-scale visual, and a material-by-material comparison chart.

Print Shrinkage Compensation Calculator - Calculate the exact scale factor to compensate for material shrinkage in 3D printing, resin printing, sintering, and casting. Enter designed vs measured dimensions from a calibration print (per X/Y/Z axis) or a known shrinkage percentage, and get the precise slicer scale percentage with copy buttons, an animated before/after diagram, step-by-step math, and a material shrinkage comparison.

Resin Casting Volume Calculator - Calculate exactly how much epoxy resin and hardener to mix for your mold. Choose a mold shape (rectangle, cylinder, half sphere), enter a known volume, or use the water-weight method, then get resin and hardener amounts in ml, fluid ounces, and grams for any mix ratio (1:1, 2:1, 3:1 and more) — with waste margin, multiple-mold batches, and an animated mixing-cup diagram. New

Resin Print Cost Calculator - Calculate the true cost of a resin 3D print from the milliliters of resin used and your bottle price, plus the consumables every print quietly burns: IPA wash fluid, gloves and towels, FEP film wear, LCD screen life, and electricity. See an animated cost breakdown, bottle consumption gauge, failed-print allowance, and a suggested selling price with markup.

Soap Making Lye Calculator (SAP) - Calculate the precise amount of lye (NaOH or KOH) needed for soap making with accurate saponification values for 40+ oils. Includes superfat calculation, water ratios, dual lye support, and safety guidelines for cold process and hot process soap.