EC ↔ PPM ↔ TDS StrengthHydroponics Lab
Convert liquid nutrient electrical conductivity to PPM on 500 (USA), 700 (Hanna), or 640 scales.
Hydroponic root health depends on water temperature. Above 22°C (72°F), pythium pathogens thrive while oxygen levels drop. Keep reservoirs aerated and cool.
Explore Additional Utilities
Inverter sizing — load watts ↔ VA rating needed
Analyze total AC continuous and surge loads to specify the ideal inverter Volt-Amp (VA) and wattage ratings.
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.
Gear inches — chainring ↔ cog ↔ wheel size
Calculate bicycle gear inches, development (meters of development), and gear ratio options.
Oven Temperature & Gas Marks
Convert oven temperature heat indexes between Celsius, Fahrenheit, and official Gas Marks.
Prism Power Converter
Convert ophthalmic prism power between prism diopters (PD) and degrees of deviation, with light bending estimations.
Bohr radius ↔ nanometers — atomic scale reference
Determine electron orbital radius and binding energy levels for Hydrogen-like atomic configurations.
Bullet drop — distance ↔ inches ↔ cm at given range
Estimate bullet drop trajectories over distance based on muzzle velocity, projectile mass, and gravitational pull.
Royal jelly production — nurse bee count ↔ grams per day
Calculate potential royal jelly production based on young nurse bee count and queen cell graft rates.
Carton CBM ↔ Container Capacity
Convert carton dimensions to Cubic Meters (CBM) and calculate carton capacity for 20ft and 40ft shipping containers.
VO2 Max & Aerobic Capacity Estimator
Convert running race times or heart rates into VO2 Max estimates and aerobic fitness classifications.
Weld throat thickness ↔ leg length — fillet weld geometry
Convert between throat thickness and leg length for fillet welds. Estimate joint volume, weld weight, and shear load capacity.
Quench rate — steel grade ↔ medium — oil vs water vs air
Identify ideal quench mediums and tempering guidelines for hardening various carbon and alloy steel grades.
Depth ↔ Geostatic & Hydrostatic Pressure
Determine lithostatic (rock overburden) and hydrostatic (fluid) pressure at custom geological underground depths or deep underwater.
Roving weight ↔ finished yarn yardage estimate
Calculate expected yarn yardage from roving mass based on target spinning grist (yards per pound or run).
Fabric Width Yardage Converter
Convert fabric yardage requirements between different standard widths like 44 inches and 60 inches.
Pipe nominal size ↔ actual OD — NPS vs DN standards
Cross-reference standard Nominal Pipe Sizes (NPS) with Diameter Nominal (DN), wall thickness, and outer diameter measurements.
No Claim Discount (NCD)
Track and project No Claim Discount percentages, claim-free year scales, and calculate potential premium savings with claim step-backs.
Bread Dough Hydration Calculator
Convert between flour weight, water weight, and hydration percentages for perfect baking doughs.
Rivet size — leather thickness ↔ post length needed
Calculate the correct rivet post length based on your total leather material stack thickness and hardware style.
Carbon Footprint Calculator
Convert between distance driven (km or miles) and greenhouse gas emissions (kg CO2) across various vehicle fuel types and efficiencies.