About us

About Craft Calculators

Craft Calculators is owned and operated by Sparkbuilt Labs, LLC. Craft Calculators is the public name of this calculator website, not a separate legal entity.

Craft Calculators helps makers turn project measurements into practical estimates. The site is built for people who need quick, transparent calculations for leatherwork, quilting, sewing, pottery, candles, resin, soap, yarn, beads, and cord projects.

Every calculator shows the formula behind the result so you can understand the math, adjust it for your own materials, and verify important decisions before buying supplies or starting a batch.

The first version includes 15 calculators. Results are educational estimates, not professional advice, and safety-critical projects should always be checked against product labels, safety data sheets, manufacturer guidance, and hands-on testing.