Home & Garden

Practical calculators for growers and DIYers. Our aquaponics tool sizes a full fish-plant-biofilter loop from your daily feed and flags un-ionized ammonia toxicity from your pH and water temperature — using published aquaculture formulas. The pleat calculator turns a finished measurement into the exact fabric length for knife, box or inverted pleats, and draws the folds in 3D as you change them, right down to a mark-by-mark chalk guide. The macrame calculator works out how long to cut every cord, how many you need, and how much to buy. The soap lye calculator computes exact lye and water for any oil blend and predicts how the bar will feel. The aquarium glass calculator sizes safe glass thickness from the Warren plate-bending formula, works out real water volume and filled weight, and prints a glazier-ready cut list for custom tank builds. The mushroom substrate calculator sizes a monotub, computes the exact water for a target field capacity with a residual-moisture correction, works out spawn-to-substrate ratios, and blends carbon-to-nitrogen for CVG, Master's Mix and custom recipes. The electroforming amperage calculator sets the exact plating current from your metal and cathode surface area, builds that area from shapes or the professional foil-weight method, and estimates hours to a target thickness with Faraday's law and bath efficiency. The BSFL yield calculator turns an organic waste stream into projected larval biomass, protein meal, lipids and frass, reports feed conversion ratio, waste reduction and bioconversion rate, draws a live mass-balance flow, and estimates revenue from editable market prices. The weaving warp calculator turns finished cloth dimensions into total warp length, ends and yarn weight with take-up, shrinkage and loom-waste allowances, converts between global yarn-count systems, and solves reed denting patterns with live fabric visualisers. The welding purge calculator sizes the argon or gas volume and time to purge a pipe by volume changes, computes ASTM G-124 pressure cycles for a target ppm with AWS D18.2 heat-tint prediction, and estimates gas cost per joint, with confined-space safety guidance. The sourdough discard calculator splits any weight of discard into its real flour and water at your starter's hydration, folds it into a recipe without over-hydrating the dough, scales a batch to the discard you have, and converts commercial yeast to natural starter, with a cups-to-grams converter built in. The Kydex spacing calculator lays out eyelet holes for real mounting hardware like the Tek-Lok, DCC Monoblock, UltiClip and Safariland, maps sheet thickness to the correct eyelet and drill-bit size, compensates for thermal shrinkage, and prints a true 1:1 drill template with a calibration ruler for taco or pancake sheaths. The paracord length calculator works out the exact 550 cord footage to wrap a Kydex sheath using the true radius-offset perimeter formula rather than a rough ratio, handles horizontal or diagonal criss-cross weaves, carries cord presets from Type I to Type IV plus gutted 550, and draws a live wrap diagram as you adjust the sheath dimensions. The plaster mold volume calculator sizes a rectangular or cylindrical mold box, subtracts the master model, and solves the exact dry plaster and water weights by consistency for USG No. 1 Pottery Plaster, Hydrocal, Ultracal, Hydro-Stone and Jesmonite AC100, with combined-density, Keith Simpson, Andrew Martin and USG polynomial methods and a live slurry visualization. The chainmaille aspect ratio calculator finds a jump ring's AR from its inner and wire diameter, or solves the exact inner diameter or wire gauge a target weave needs, converts AWG and SWG gauges to millimetres, predicts metal springback from mandrel size for steel, aluminium, copper, titanium and niobium, and lights up every compatible weave from European 4-in-1 to Full Persian, Dragonscale and the Jens Pind Linkage. The leather thread length calculator works out exactly how much thread to cut for a hand saddle stitch or a machine lockstitch, using the true figure-eight geometry from seam length, total leather thickness and stitch spacing (SPI) rather than a rough multiplier, with SPI-to-millimetre and ounce-to-millimetre reference charts built in. The sausage fat ratio calculator works out the exact lean-to-fat blend for homemade sausage, solving how much fat to add to lean meat for an 80/20 or 70/30 ratio, accounting for the inherent fat in commercial mince, building to a target batch weight, or blending two cuts with the Pearson Square, plus automatic salt, Cure #1 (0.25% for 156 ppm nitrite) and ice-water seasoning and a live lean-to-fat chart. The fabric dyeing WOF calculator works out dye and auxiliary quantities from the Weight of Fibre, the exact water volume from your liquor ratio, and salt and soda ash in grams per litre for Procion reactive dyes, acid dyes, disperse dyes and natural dyes with mordants, with a stock-solution mode, a live dye-bath and an eco-metrics water and energy dashboard. More home and garden tools are on the way.