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Handcrafted Tools
A masterfully calibrated toolkit for developers, creators, and professionals. Convert measurements, real-time fiscal currencies, global time zones, storage formats, and developer keys with pristine precision.
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Stride length ↔ cadence ↔ running speed
Analyze running biomechanics: calculate speed based on cadence (SPM) and stride length.
Pipe thread standard — NPT ↔ BSP ↔ metric
Compare dimensions, angles, thread pitches, and sealing mechanics of NPT, BSPP, BSPT, and Metric thread systems.
Barometric Altimeter Settings
Calibrate pressure settings between QNH and QFE based on airfield elevation and temperature.
Wing loading — pilot weight + gear ↔ glider area
Calculate paraglider wing loading in kg/m² to determine wing dynamics and agility.
Engine power ↔ hull speed — planing vs displacement
Estimate maximum displacement hull speeds (LWL formula) or calculate planing hull speeds using Crouch's classic marine formula.
Browse by Category
Everything you need. Organized, fast, and easy to use.
Units
Convert between length, weight, speed, area, volume and more.
Currency
Real-time exchange rates for global currencies.
Time Zones & Calendar
Convert global timezones, Julian dates, Islamic Hijri, Hebrew, ISO week numbers, and business fiscal years.
Data
Convert data units, sizes, bits, bytes and more.
Dev Tools
Format, encode, decode and validate your data.
Converters
All-in-one converters for everyday needs.
Health & Body
Calculate BMI, body fat ratio, waist risks, and medical doses.
Legal & Document
Estimate legal billable hours, translation rates, and tiered notary public fees.
Sports & Fitness
Estimate VO2 Max, convert running paces, map cycling training FTP zones, and calculate 1RM.
Environment & Sustainability
Convert vehicle CO2 emissions, estimate water footprints, calculate solar & wind energy generation, and map recycling resource savings.
Geology & Mining
Compare earthquake Richter ↔ Mw scales, determine Mohs hardness scratch levels, convert ore grades (g/t, %, oz/ton), and calculate overburden depth-pressure.
Psychology & Research
Calculate effect sizes (Cohen's d ↔ r ↔ odds ratio), convert percentiles ↔ z-scores, map Likert responses, estimate required sample sizes, and analyze IQ ranks.
Woodworking & Carpentry
Calculate board feet, wood shrinkage, dovetail and bevel angles, compare sandpaper grits, and look up standard screw gauges and nail sizes.
Plumbing & Pipework
Convert Nominal Pipe Sizes to actual outer diameters, calculate flow velocity and water hammer pressure, compare thread standards (NPT, BSP, metric), estimate hot water demand, and calculate drain slope drops.
HVAC & Thermal
Convert air ventilation flow rates, calculate room cooling load requirements (BTU), determine insulation R-value properties, assess wall surface dew point risks, and calculate physical refrigerant lines.
Welding & Metallurgy
Determine MIG wire feed speeds and stick electrode currents, compute high tensile preheat temperatures, convert steel hardness scales (Rockwell, Brinell, Vickers), cross-reference ASTM standards, and calculate fillet throat geometry.
Masonry & Concrete
Estimate mortar mix ratios, bricks and CMU block count for walls, tile grout bags coverage, convert concrete strength scales (MPa, psi, N/mm²), calculate water-cement durability ratios, and determine wall render/plaster thickness yields.
Automotive
Decode tire size specs, calculate vehicle gear ratio and final drive road speeds, estimate engine displacement volumes, find mechanical static compression ratios, size fuel injector flow, convert coil spring rates, and check alignment camber angle offsets.
Marine Engineering
Convert ship displacement tonnage to submerged volume, calculate propeller pitch and theoretical boat speed, estimate planing vs displacement hull speeds, compute fuel burn rate per engine horsepower, and assess rope breaking strength with safe working loads.
Telecommunications
Convert logarithmic dB gains, calculate carrier frequencies ↔ wavelengths, estimate cable losses & optical span attenuation, find light propagation latencies, compute theoretical channel bandwidth capacities (Shannon limit), and analyze Bit Error Rates.
Networking & IT
Convert CIDR subnets, decode IPv4 formats, format MAC physical addresses, plan network packet serialization delay times, compute RAID redundant usable storage capacities, and measure CPU cycle clock speed MIPS rates.
Optics & Laser
Convert laser divergence angles to target spot sizes, evaluate power density concentrations, compute filter optical densities, design TIR interfaces, and measure fiber coupling numerical apertures.
Thermodynamics
Convert specific heat capacities, translate thermal insulation conductivities, lookup saturated steam properties, determine maximum Carnot engine efficiency, and compute heat fluxes.
Quantum & Atomic
Convert photon energies to wavelengths, calculate atomic mass unit molar ratios, translate fundamental Planck limits, model De Broglie matter waves, and chart atomic orbital Bohr shells.
Oceanography
Convert between Practical Salinity Units, translate marine depths to hydrostatic pressures, model wave celerity sea states, estimate chlorophyll indices, and compute thermohaline densities.
Forestry & Timber
Convert tree breast-height diameters to basal area indices, estimate standing timber volumes, compute carbon dry sequestration weights, model canopy cover transmittance, and scale stacked cords of firewood.
Mining & Drilling
Convert drill bit sizes, estimate solid and broken rock density tonnage, calculate explosive powder factor weights, model penetration (ROP) times, and compute ore grade dilution values.
Ceramics & Pottery
Calculate clay shrinkages across drying and firing, convert specific gravity glaze consistency parameters, map Orton pyrometric cones, normalize batch chemical weights, and diagnose glaze-to-clay thermal fit coefficients.
Brewing & Fermentation
Calculate alcohol percentage, analyze hop bitterness ratios, convert water hardness minerals, estimate yeast pitch cell rates, and balance carbonation pressures.
Perfumery & Cosmetics
Analyze perfume oil concentration values, map dynamic centipoise product viscosity profiles, calculate accurate preservative weights, dilute essential oils safely, and estimate acidifying drops.
Renewable Energy
Convert W/m² irradiance to peak sun hours, calculate kinetic wind density class potentials, scale battery autonomy backup banks, compute inverter load ratings, and audit grid feed-in offsets.
Cryptography & Security
Compare security levels across symmetric keys, RSA, and ECC, analyze hash digests, calculate Shannon password entropy, verify certificate validity periods, and convert raw text formats.
Linguistics Advanced
Convert raw text into Morse and NATO spelled phonetics, map letters to Semaphore flag angles, inspect fingerspelling handshapes, calculate shorthand dictation WPMs, and track dialect vowel shift ranges.
Sports Science
Convert threshold heart rate percentages to training zones, calculate mechanical stride and cadence speeds, examine power-to-weight ratios, analyze baseball hitting average stats, and translate golf handicap index ratings.
Textile Manufacturing
Convert fabric weights between GSM and oz/yd², evaluate cotton single-ply thread counts, analyze warp/weft density ratios, calculate garment shrinkage and cut size allowances, and compute liquor-bath dyeing recipes.
Paper & Printing
Convert paper weights between GSM and US basis weights, estimate CMYK ink consumption, calculate line screen LPI resolution demands, determine spine widths, and match folding sheets to envelope sizes.
Event & Production
Convert stage lighting lux/foot-candles, calculate speaker SPL coverage and amplifier wattage, compute rigging safety margins, size event generators (kVA), and check cable-run wire gauge limits.
Archery & Ballistics
Convert draw weight bow poundages, estimate required arrow static spine ratings, compute sectional density and G1 ballistic coefficient (BC), analyze muzzle velocity and energy, estimate bullet drop trajectories, and calculate rifling twist rate.
Watchmaking & Horology
Convert watch beat rates and frequencies, estimate mainspring power reserve durations, explore jewel count bearing applications, convert water resistance ATM ratings, size case diameters and strap lug widths, and map crown setting functions.
Beekeeping & Apiary
Estimate seasonal honey surplus yields based on hive population, verify Varroa mite wash diagnostic treatment thresholds, calculate nectar-to-honey moisture reduction weights, convert capped brood frames to emerging bee population, and estimate beeswax capping yields.
Glassmaking & Glazing
Evaluate glass thickness for wind loads, calculate double vs triple glazing thermal U-values, convert Solar Heat Gain Coefficient (SHGC) shading factors, check VLT tint levels, and estimate safety glass impact ratings.
Paper Folding & Origami
Scale starting paper square sizes to finished origami model dimensions, compute theoretical fold ratio limits, translate crease pattern grid dimensions, and calculate optimal moisture weight for wet folding.
Aquaculture & Fish Farming
Calculate stocking density and carrying capacities, determine feed conversion ratio efficiencies, analyze dissolved oxygen limits, map un-ionized ammonia toxicity scales, compute tank water turnover rates, and convert salinity ppt values.
Candle Making
Formulate precise fragrance oil weights, calculate recommended wick sizing options, convert wax melting and pouring temperatures, determine liquid dye drop counts or color chips required, and map container volumes to dry wax weight.
Soap Making
Formulate cold and hot process lye requirements, calculate skin-conditioning superfat percentages, optimize water discounts, look up standard oil saponification values, and forecast bar hardening cure durations.
Leatherworking
Convert leather weights in ounces to millimeters, calculate saddle stitch thread lengths, estimate leather dye volume requirements, determine ideal rivet post sizes, and scale pattern layouts uniformly.
Papermaking
Calculate pulp-to-water vat consistency, convert paper basis weights to finished sheet caliper thicknesses, evaluate sheet formation uniformities, determine filler weights and retention aid polymer dosages, and convert CSF to SR freeness.
Glassblowing
Estimate finished blown piece dimensions from gather weight, calculate annealing schedules by glass CoE, formulate color rod saturation, and optimize blowpipe rotation speed to correct gravity sag.
Blacksmithing & Forging
Calculate steel bar weights across round, square, or flat sections, check forge temperature color ranges, optimize alloy quenching rates, plan drawing out ratios, and gauge coal fuel consumption.
Stonecutting & Lapidary
Project carat weight yields from rough gemstone quality, determine optimal pavilion and crown faceting angles based on refractive indexes, calculate grinding lap SFPM surface speeds, manage abrasive micron grit progressions, and map cabochon dome curves.
Fiber Arts & Spinning
Convert wraps per inch (WPI) to yarn weight categories, calculate twist per inch (TPI) from spinning wheel flyer ratios, estimate washed fiber clean yields, project yarn yardage, and balance plying twist angles.
Bookbinding & Restoration
Calculate spine widths from page counts and paper weights, split book blocks into signatures, measure leather/cloth covering dimensions, blend PVA and paste ratios, and lay out grain-aligned endpapers.
Printmaking & Press
Estimate intaglio etching durations based on acid Baumé, adjust ink viscosity with oils, compute screen printing ink deposit depths by mesh count, determine UV exposure times, and layout print edition numbering distributions.
Cartography & GIS
Convert representative fraction scales, convert WGS84 geographic coordinates to projection UTM zones, calculate contour slope grade percentages, analyze pixel GSD resolutions, and map bearing azimuths.
Hydroponics & Soil-less
Convert EC to PPM on 500/700 scales, adjust reservoir pH with buffers, dilute liquid multi-part fertilizers, compute grow light PPFD and photoperiod DLI, measure container media volume, and trace dissolved oxygen.
Falconry
Assess flight weights and bird fitness, determine training lure size metrics, fit jesses by tarsus leg size, and calculate hood sizes.
Taxidermy
Determine salt and acid pickle solution volumes, convert body measurements to mannikin sizes, calculate tanning ratio mixes, and fit glass eyes.
Pest Control
Dilute chemical concentrates, measure application coverage rates, plan bait station spacing densities, and compute gas fumigation doses.
Scuba & Diving
Calculate Nitrox MODs, Surface Air Consumption (SAC) rates, NDL safety stop schedules, wetsuit buoyancy ballast weights, and water clarity visibility metrics.
Parachuting & Skydiving
Calculate exit altitude freefall seconds, canopy wing loading sizes, parachute snivel hard deck safety margins, and landing wind drift offsets.
Rock Climbing
Estimate fingertip hold edge crimp pulley loads, dynamic fall factors, rope elongation stretch, anchor angle bolt load multipliers, and climbing grade scales.
Mountaineering
Assess altitude sickness acclimatization risks, calculate snowpack water equivalent avalanche factors, wind chills, oxygen partial pressure, and metabolic calorie burns.
Cycling Advanced
Analyze gear inches, determine cadence Speed velocity thresholds, tire rolling resistance power loss, aerodynamic drag CdA coefficients, and climb gradient percentages.
Swimming Advanced
Optimize stroke rate distance efficiency, monitor SWOLF lap efficiency scores, analyze turn transitions with dolphin kicks, and measure drag suit resistances.
Equestrian
Analyze stride lengths, gait cadences, arena standard specifications, feed rations, bit sizing clearances, saddle tree fitting angles, and rug sizes.
Archery Advanced
Calculate bow limb angles, pre-tensions, correct arrow flight paper tuning errors, generate interpolated sight tape marks, and optimize release aid travel adjustments.
Gliding & Soaring
Perform wind-adjusted glide ratio calculations, explore sink rate polar curves, estimate thermal core diameters with bank angle G-forces, and calculate MacCready Speed-to-Fly airspeeds.
Kite Surfing
Calculate recommended kite sizes, analyze line length steering response latency, determine wind window power zones, and size kiteboards.
Paragliding
Determine paraglider wing loading profiles, calibrate speedbar trim system pressures, analyze reserve safety deployments, and map cross country paths.
Astronomy Advanced
Calculate celestial angular diameters, explore cosmological redshifts, convert absolute magnitudes, solve Keplerian orbits, and calculate signal delays.
Seismology
Relate Richter scales with Modified Mercalli ratings, estimate epicenter distances, convert Peak Ground Accelerations, and predict tsunami wave speeds.
Volcanology
Calculate volumetric lava flow discharge, map Volcanic Explosivity Index (VEI) columns, forecast tephra ash deposition, and track SO₂ gas fluxes.