About SaunaCraft

Building or planning a home sauna raises a string of practical questions that don’t have an obvious answer without doing some arithmetic. How big a heater does this room actually need? How much bench length fits four people comfortably, and does a second tier change that? How many board feet of cedar or aspen should you order for the walls and ceiling? How much water is a reasonable amount to throw on the rocks? How long should a heat round run before you cool down? And does building one at home ever pay for itself against what you’d spend on spa visits instead? None of these are hard questions individually, but working them out by hand, for a project you’ll only build once, is where planning turns into guesswork.

SaunaCraft exists to put real numbers in front of you before you commit lumber or money. Instead of long articles you have to read end to end, the site is built around a set of small, single-purpose calculators, each aimed at one decision. The Sauna Heater Size Calculator turns your room’s dimensions, plus any glass walls or a glass door, into a recommended heater output in kilowatts. The Sauna Bench-Space Plannerworks out the linear bench length you need from your bather count and whether they’ll sit upright or lie down. The Cladding Board-Feet Calculator converts your wall and ceiling surface area, minus the door and plus a waste allowance, into board feet of paneling to order. The Löyly Water-to-Steam Calculatorshows how many ladles of water convert to steam and what share of your room’s air that represents. The Sauna Session Timer builds a full round-by-round schedule and runs a live countdown through it. And the Sauna Build Cost & ROI Calculatorweighs your build cost and running electricity against what you’d otherwise pay for spa visits, to show the payback period and 5-year net position.

Beyond the calculators, the blog and learn section cover sauna design, materials, the löyly ritual, and home-build economics, and the Sauna & Steam-Bathing Culture Museum is a browsable collection on the Finnish sauna, Turkish hammam, Russian banya, and Korean jjimjilbang, with every entry, image, and fact drawn from Wikipedia and Wikimedia Commons.

A few things worth stating plainly. SaunaCraft is an independent site, not affiliated with any sauna manufacturer, spa chain, or contractor. It is supported by advertising, which is how the tools stay free with no account required. Every result the tools produce — a heater size, a bench length, a board-foot count, a steam estimate, a session schedule, a payback period — is a general planning estimate built on the numbers you enter and on common design conventions, not a professional engineering, electrical, or financial determination. This site covers sauna design, building, and culture only; it does not offer medical or therapeutic advice of any kind. Before wiring a heater or finalizing a build, confirm the specific product’s spec sheet and local code requirements with the manufacturer and a licensed electrician or contractor. If a tool looks off, or there’s a calculator you wish existed, the contact page is the place to say so.