Wood Moisture API
Wood-moisture maths as an API, computed locally and deterministically — the moisture-content, oven-dry-weight and drying-target numbers a woodworker, sawyer, kiln operator or firewood seller weighs timber by. The moisture-content endpoint takes a wet weight and an oven-dry weight and returns the moisture content on both conventions: the dry basis (water ÷ oven-dry weight × 100, the forestry and woodworking standard) and the wet/green basis (water ÷ wet weight × 100, common in agriculture and paper) — a board weighing 120 g that dries to 100 g holds 20 g of water and is 20 % dry-basis or 16.7 % wet-basis, so it always matters which is quoted. Above fibre saturation (~28–30 %) the wood is still shedding free water and has not begun to shrink. The dry-weight endpoint back-calculates the unchanging oven-dry weight from a current weight and a meter reading (wet ÷ (1 + MC/100)), the anchor for any drying plan because the wood substance does not change as water leaves. The target-weight endpoint uses that anchor to give the weight a piece should reach for a target moisture content and the water still to drive off — taking 120 g at 20 % down to 12 % means a 112 g target and 8 g of water to lose, so you simply weigh the piece down to that figure. Everything is computed locally and deterministically, so it is instant and private. Ideal for woodworking and lutherie tools, sawmill and kiln-drying apps, and firewood-seasoning calculators. Pure local computation — no key, no third-party service, instant. Mass-balance maths — pair it with a real moisture meter. 3 compute endpoints. For board feet use a lumber API; for a wood-stack volume a firewood API.
api.oanor.com/woodmoisture-api
