Hydraulics & Fluid Lab
Convert volumetric flows, interconvert dynamic and kinematic viscosity, analyze fluid head pressure columns, model pump efficiency curves, and visualize Reynolds flow regimes.
Head Pressure
Convert between hydrostatic head pressure (meters/feet of water) and fluid pressures like bar, PSI, and Pascals.
0.00 bar (Gauge)
Atmospheric reference point
0.981 bar
14.223 PSI
@ 10m depth
Explore Additional Utilities
Clothing Size Converter
Convert apparel sizes (XS to 3XL) across US, UK, European, and Asian standards.
pH buffer amount — solution volume ↔ ml of pH up/down
Estimate the volume of phosphoric acid (pH Down) or potassium hydroxide (pH Up) needed to adjust nutrient water reservoirs.
Nutrient dilution — concentrate ratio ↔ final EC
Calculate water and liquid concentrate volumes for multi-part hydroponic reservoirs to achieve target mixing ratios and EC.
Tanning solution strength — hide weight ↔ chemical ratio
Calculate tanning agent concentrations, water ratios, and oil emulsions needed based on cured hide weight.
Dog Age ↔ Human Age Equivalent
Calculate the human age equivalent of a dog based on their age and breed size category (small, medium, large, or giant), using modern veterinary curves.
Filament weight ↔ length (grams ↔ meters)
Convert between filament physical weight in grams and equivalent spool length in meters based on material density and diameter.
Thread Weight Converter
Convert between different thread sizing standards including Tex, Denier, and Number English (Ne).
Decompression stop — depth + time → stop obligation
Estimate decompression stop obligations, no-decompression limits (NDL), and ceiling depths based on depth and bottom time.
Scale factor (model size ↔ real world)
Convert dimensions between model design sizes and physical real-world scale targets, including imperial/metric conversions.
Safety glass thickness ↔ impact resistance rating
Calculate safety glass thickness requirements and impact resistance (Tempered vs. Laminated).
Water resistance — ATM ↔ bar ↔ meters depth rating
Convert water pressure tolerances across ATM, Bar, and depth meters. Understand safe real-world water sport activities.
Mohs Hardness & Scratch Resistance
Compare minerals, absolute hardness values, and scratch interactions using the classic 1-10 Mohs scale and Knoop indentation hardness.
Paint Coverage Calculator
Estimate the gallons or liters of paint needed based on area and number of coats.
Thread count ↔ fabric quality rating
Calculate and convert cotton single-ply thread counts to analyze and rate fabric quality and softness.
Packet size ↔ transmission time — network planning
Model network serialization delays and transit times across various network speeds and bandwidth options.
Arrow spine ↔ draw weight + length — stiffness matching
Estimate required arrow static spine rating (stiffness) based on bow draw weight, arrow length, and bow type.
Lumber Size & Board Feet Calculator
Calculate board feet volume, convert between nominal and actual lumber sizes, and estimate weights.
Coffee Brewing Ratio Calculator
Determine the perfect coffee-to-water brewing ratio based on grams of coffee, milliliters of water, and cup size.
Maritime & Aviation Speed
Convert maritime knots, airspeed parameters, and hourly nautical coordinates.
Twist rate — caliber ↔ bullet length → stabilization
Calculate the optimal barrel rifling twist rate needed to stabilize a bullet of a given length, caliber, and velocity.