Free calculators for resin, candles, 3D printing and the kitchen
Free calculators for makers and home cooks — epoxy resin, candles and wax melts, 3D printing cost, filament, brine, pizza dough, coffee ratios and knitting — in metric and US units, with sources.
Resin & Woodworking
Candles & Wax
3D Printing
Kitchen
Knitting & Crochet
Worked answers for common projects
Epoxy for river tables and slabs
Candles, filament and brine
Pizza dough and coffee
Numbers from the people who make the materials
A calculator is only as good as its inputs. Rather than copying rules of thumb from forum posts, these calculators use manufacturers’ published figures — the maximum pour depth on each deep-pour epoxy, the maximum fragrance load each wax is rated for, the density on each filament’s technical data sheet and the average power Bambu Lab and Prusa measured for their printers — and link to them, so you can check the number for the exact product you bought.
Weigh, don’t guess
Almost every recipe on this site works better by weight. Fragrance oil, epoxy kits with a weight ratio, pizza dough and brine all depend on proportions, and a cup of one brand of salt can weigh twice as much as a cup of another. A kitchen scale that reads to 1 g is the most useful tool a maker can own; the calculators give every answer in grams and ounces.
About these calculators
Yes. Every calculator on this site is free to use with no sign-up and no limit, and most run entirely in your browser.
Yes. Each calculator lets you enter inches or centimetres, ounces or grams, gallons or litres, and shows results in both.
From manufacturers’ data sheets and published standards: deep-pour epoxy depths from TotalBoat, EcoPoxy, MAS and Stone Coat; wax fragrance loads from CandleScience, IGI and EcoSoya; filament densities from Prusament, Bambu Lab and Polymaker data sheets (and a generic figure for ABS); printer power from Bambu Lab and Prusa; the SCA Golden Cup ratio; the AVPN rules for Neapolitan pizza; USDA nitrite limits; and the Craft Yarn Council yarn weight system. Each page links to its sources.
They follow the cited sources, but curing meat safely depends on a tested recipe, accurate weighing and correct storage. Treat the calculator as a check on your recipe, not a replacement for one.