Forestry & Timber Calculators
Convert tree breast height diameters to basal area metrics, assess merchantable standing lumber volumes, calculate dry carbon dioxide sequestration offsets, analyze canopy light transmissions, and scale stacked cords of firewood.
Standing Timber Volume
Estimate merchantable tree volume from DBH and usable log height using the Doyle, Scribner, International 1/4", and Metric Form Factor log rules.
Dendrometric Inputs
Forestry Core Report
Dendrometric / SilviculturalEstimated Merchantable Solid Volume
Forestry Scaling Reference Info
Standard forest diameter values are measured at DBH (4.5 feet / 1.37 meters aboveground). Cords of firewood represent stacked wood, which contains roughly 65% solid wood volume and 35% empty airspace gaps.
Explore Additional Utilities
Head Pressure Converter
Convert between hydrostatic head pressure (meters or feet of water) and fluid pressures like bar, PSI, Pascals, and atmospheres.
Cure time — soap thickness ↔ days to harden
Forecast recommended bar cure durations and hardening rates based on shape profile dimensions.
Lye calculator — oil weight ↔ NaOH ↔ KOH amount
Determine exact NaOH and KOH weights required for cold and hot-process soap formulation batches.
Exposure time — emulsion type ↔ UV source ↔ seconds
Estimate photo-emulsion exposure durations for screen printing frames or solar plates using light distance calculations.
Speed to fly — polar curve ↔ McCready interthermal speed
Calculate the optimum speed to fly between thermals based on the glider polar curve, expected next thermal climb rate, and headwind/sink.
Covering material — book size ↔ cloth/leather dimensions
Determine required dimensions for book cloth, leather hide, or cover board wrapping based on book block margins.
Gemstone rough weight ↔ finished carat yield
Estimate finished faceted carat weight and material yield percentages of raw gemstone rough.
Plying angle ↔ yarn strength — twist balance
Calculate optimal twist plying angles, yarn twist multipliers, and balance criteria to spin stable structured yarns.
Tanning solution strength — hide weight ↔ chemical ratio
Calculate tanning agent concentrations, water ratios, and oil emulsions needed based on cured hide weight.
Buoyancy — weight needed ↔ wetsuit thickness + water type
Determine required lead weight adjustments based on wetsuit thickness, water density (salt vs. fresh), and diver body metrics.
Dye concentration — leather area ↔ product needed
Estimate leather dye volume needed based on total surface area, coat layers, and color reduction ratios.
Adhesive ratio — PVA ↔ paste ↔ water formulation
Formulate custom bookbinding adhesive mixtures (polyvinyl acetate and wheat starch paste) for perfect open time and flexibility.
Contour interval ↔ slope gradient — terrain steepness
Calculate terrain steepness, percentage grade, and slope angles using contour line spacing and map contour intervals.
Edition numbering — total prints ↔ AP ↔ PP allocation
Structure printmaking edition runs with proper numbering layouts, Artist Proofs, and Printer Proofs allocations.
Aerodynamic drag — frontal area + CdA → watts at given speed
Determine power requirements (watts) to overcome aerodynamic drag based on rider CdA, air density, and speed.
Freefall time — altitude ↔ seconds in freefall
Estimate freefall duration and terminal velocity based on exit altitude, deployment altitude, and body position.
Endpaper size — book block dimensions ↔ sheet size
Determine correct paper grain directions and cut layout dimensions of endpapers relative to parent sheet paper sizes.
Bit size — horse mouth width ↔ mm/inch measurement
Convert horse mouth width measurement to proper bit sizing in inches, centimeters, and millimeters with clearance safety margins.
Signature count — total pages ↔ sheets per signature
Divide book blocks into balanced signatures and calculate standard folded sheet configurations.
SWOLF score — strokes + seconds per length
Calculate and track your SWOLF efficiency score based on lap time and stroke count for various pool lengths.