Small, fast, privacy-friendly calculators for makers, sellers and DIYers. Everything runs in your browser — no signup, no uploads.
Itemized Etsy fees, net profit, margin, reverse pricing.
Compress a photo or signature to an exact KB target — 100% in your browser.
Knitting & crochet: stitches, rows and yarn amounts from your gauge.
How much fabric for curtains, a circle skirt or any project — 45" and 60" bolts.
Exact epoxy volume, mix ratios, waste factor and cost.
Coop, run, nesting boxes and roost sizing from your flock.
Cubic yards, bags, tons and cost for mulch, gravel, compost or topsoil.
Filament or resin: full cost breakdown and suggested sale prices.
Rating changes per game, K-factors and tournament performance rating.
Estimate SE tax, federal income tax, quarterly payments and set-aside %.
Batch margin calculator: CSV up to 500 SKUs, all marketplaces, tax presets, export.