Start with the Flow Rate Calculator — it is the most universally applicable tool and establishes the baseline for all other calculations. Once you know your nozzle's K-factor and operating pressure, you can confirm actual versus rated flow. Then use the Coverage Calculator to verify that your nozzle spacing produces the required overlap at your standoff distance. For applications where droplet size matters (dust suppression, gas absorption, evaporation), run the Droplet Size Calculator next.

The K-factor is a nozzle's hydraulic constant defined as K = Q ÷ √P — where Q is flow rate and P is supply pressure. It is published in every nozzle's datasheet, usually in GPM/√PSI for North American specifications. Once you have K for your nozzle, calculating flow at any pressure is Q = K × √P. See the full explanation with worked examples in our Flow Rate Formulas guide, or use the Flow Rate Calculator which accepts K directly as an input.

The Droplet Size Calculator uses the empirical power-law relationship Dv50 ∝ P⁻⁰·³ × σ⁰·⁴ which gives predictions within ±15–25% of laser diffraction measurements for standard hydraulic nozzles spraying water-like fluids at rated operating conditions. Accuracy decreases for: highly viscous liquids (above 20 cP), unusual orifice geometries, and pressures far outside the nozzle's rated range. For viscous liquids above 10 cP, apply the manufacturer's viscosity correction curves to the calculator output — the base prediction assumes water-like surface tension (72 mN/m) and viscosity (1 cP).

Yes — a 15% flow increase means the orifice diameter has increased by approximately 7% (since area = diameter², a 7% diameter increase gives 15% area increase). The nozzle's orifice is worn and should be replaced. Cleaning cannot restore a worn orifice — the orifice material has been removed by abrasion or erosion and is not recoverable. Use the Nozzle Wear Calculator to calculate the actual orifice diameter, project remaining service life, and quantify the annual cost of running worn nozzles in your system. See also: How to Detect Nozzle Wear for the complete timed collection protocol.

The Mining Water Conservation ROI and Compressed Air Savings calculators both accept current operating parameters and upgrade scenario parameters, and output annual savings and payback period. To build a business case: (1) measure current nozzle flow rate with the timed collection method; (2) obtain the flow rate specification for the proposed replacement nozzle; (3) enter both into the relevant ROI calculator along with your water or energy cost, operating hours per year, and nozzle count; (4) the calculator outputs annual dollar savings and months-to-payback. This output can be presented directly to purchasing or operations management as a one-page justification.

Yes, with corrections. The Flow Rate Calculator includes a liquid density field — for liquids denser than water (sulfuric acid: 1.84 g/cc; sodium hypochlorite solution: 1.1 g/cc), enter the actual density and the calculator applies the density correction to the K-factor formula. The Droplet Size Calculator includes surface tension and viscosity fields — enter your liquid's values rather than water defaults. For viscosities above 10 cP, the droplet size prediction becomes less accurate because the empirical power-law relationship was developed primarily for low-viscosity liquids; treat the result as a starting estimate and verify with manufacturer's viscosity correction data or direct measurement if droplet size is specification-critical.